switch to go vendoring

vendor/github.com/go-micro/plugins/v4/client/grpc/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/client/grpc/README.md

@@ -0,0 +1,25 @@
+# GRPC Client
+
+The grpc client is a [micro.Client](https://godoc.org/github.com/micro/go-micro/client#Client) compatible client.
+
+## Overview
+
+The client makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying communication mechanism.
+
+## Usage
+
+Specify the client to your micro service
+
+```go
+import (
+	"github.com/micro/go-micro"
+	"github.com/micro/go-plugins/client/grpc"
+)
+
+func main() {
+	service := micro.NewService(
+		micro.Name("greeter"),
+		micro.Client(grpc.NewClient()),
+	)
+}
+```

vendor/github.com/go-micro/plugins/v4/client/grpc/codec.go

@@ -0,0 +1,209 @@
+package grpc
+
+import (
+	b "bytes"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/codec/bytes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/runtime/protoiface"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+type jsonCodec struct{}
+type protoCodec struct{}
+type bytesCodec struct{}
+type wrapCodec struct{ encoding.Codec }
+
+var useNumber bool
+
+var (
+	defaultGRPCCodecs = map[string]encoding.Codec{
+		"application/json":         jsonCodec{},
+		"application/proto":        protoCodec{},
+		"application/protobuf":     protoCodec{},
+		"application/octet-stream": protoCodec{},
+		"application/grpc":         protoCodec{},
+		"application/grpc+json":    jsonCodec{},
+		"application/grpc+proto":   protoCodec{},
+		"application/grpc+bytes":   bytesCodec{},
+	}
+)
+
+// UseNumber fix unmarshal Number(8234567890123456789) to interface(8.234567890123457e+18).
+func UseNumber() {
+	useNumber = true
+}
+
+func (w wrapCodec) String() string {
+	return w.Codec.Name()
+}
+
+func (w wrapCodec) Marshal(v interface{}) ([]byte, error) {
+	b, ok := v.(*bytes.Frame)
+	if ok {
+		return b.Data, nil
+	}
+	return w.Codec.Marshal(v)
+}
+
+func (w wrapCodec) Unmarshal(data []byte, v interface{}) error {
+	b, ok := v.(*bytes.Frame)
+	if ok {
+		b.Data = data
+		return nil
+	}
+	return w.Codec.Unmarshal(data, v)
+}
+
+func (protoCodec) Marshal(v interface{}) ([]byte, error) {
+	switch m := v.(type) {
+	case *bytes.Frame:
+		return m.Data, nil
+	case proto.Message:
+		return proto.Marshal(m)
+	case protoiface.MessageV1:
+		// #2333 compatible with etcd legacy proto.Message
+		m2 := protoimpl.X.ProtoMessageV2Of(m)
+		return proto.Marshal(m2)
+	}
+	return nil, fmt.Errorf("failed to marshal: %v is not type of *bytes.Frame or proto.Message", v)
+}
+
+func (protoCodec) Unmarshal(data []byte, v interface{}) error {
+	switch m := v.(type) {
+	case proto.Message:
+		return proto.Unmarshal(data, m)
+	case protoiface.MessageV1:
+		// #2333 compatible with etcd legacy proto.Message
+		m2 := protoimpl.X.ProtoMessageV2Of(m)
+		return proto.Unmarshal(data, m2)
+	}
+	return fmt.Errorf("failed to unmarshal: %v is not type of proto.Message", v)
+}
+
+func (protoCodec) Name() string {
+	return "proto"
+}
+
+func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
+	}
+	return *b, nil
+}
+
+func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return fmt.Errorf("failed to unmarshal: %v is not type of *[]byte", v)
+	}
+	*b = data
+	return nil
+}
+
+func (bytesCodec) Name() string {
+	return "bytes"
+}
+
+func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
+	if b, ok := v.(*bytes.Frame); ok {
+		return b.Data, nil
+	}
+
+	if pb, ok := v.(proto.Message); ok {
+		bytes, err := protojson.Marshal(pb)
+		if err != nil {
+			return nil, err
+		}
+		return bytes, nil
+	}
+
+	return json.Marshal(v)
+}
+
+func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if b, ok := v.(*bytes.Frame); ok {
+		b.Data = data
+		return nil
+	}
+	if pb, ok := v.(proto.Message); ok {
+		return protojson.Unmarshal(data, pb)
+	}
+
+	dec := json.NewDecoder(b.NewReader(data))
+	if useNumber {
+		dec.UseNumber()
+	}
+	return dec.Decode(v)
+}
+
+func (jsonCodec) Name() string {
+	return "json"
+}
+
+type grpcCodec struct {
+	// headers
+	id       string
+	target   string
+	method   string
+	endpoint string
+
+	s grpc.ClientStream
+	c encoding.Codec
+}
+
+func (g *grpcCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
+	md, err := g.s.Header()
+	if err != nil {
+		return err
+	}
+	if m == nil {
+		m = new(codec.Message)
+	}
+	if m.Header == nil {
+		m.Header = make(map[string]string, len(md))
+	}
+	for k, v := range md {
+		m.Header[k] = strings.Join(v, ",")
+	}
+	m.Id = g.id
+	m.Target = g.target
+	m.Method = g.method
+	m.Endpoint = g.endpoint
+	return nil
+}
+
+func (g *grpcCodec) ReadBody(v interface{}) error {
+	if f, ok := v.(*bytes.Frame); ok {
+		return g.s.RecvMsg(f)
+	}
+	return g.s.RecvMsg(v)
+}
+
+func (g *grpcCodec) Write(m *codec.Message, v interface{}) error {
+	// if we don't have a body
+	if v != nil {
+		return g.s.SendMsg(v)
+	}
+	// write the body using the framing codec
+	return g.s.SendMsg(&bytes.Frame{Data: m.Body})
+}
+
+func (g *grpcCodec) Close() error {
+	return g.s.CloseSend()
+}
+
+func (g *grpcCodec) String() string {
+	return g.c.Name()
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/error.go

@@ -0,0 +1,69 @@
+package grpc
+
+import (
+	"net/http"
+
+	"go-micro.dev/v4/errors"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func microError(err error) error {
+	// no error
+	switch err {
+	case nil:
+		return nil
+	}
+
+	if verr, ok := err.(*errors.Error); ok {
+		return verr
+	}
+
+	// grpc error
+	s, ok := status.FromError(err)
+	if !ok {
+		return err
+	}
+
+	// return first error from details
+	if details := s.Details(); len(details) > 0 {
+		return microError(details[0].(error))
+	}
+
+	// try to decode micro *errors.Error
+	if e := errors.Parse(s.Message()); e.Code > 0 {
+		return e // actually a micro error
+	}
+
+	// fallback
+	return errors.New("go.micro.client", s.Message(), microStatusFromGrpcCode(s.Code()))
+}
+
+func microStatusFromGrpcCode(code codes.Code) int32 {
+	switch code {
+	case codes.OK:
+		return http.StatusOK
+	case codes.InvalidArgument:
+		return http.StatusBadRequest
+	case codes.DeadlineExceeded:
+		return http.StatusRequestTimeout
+	case codes.NotFound:
+		return http.StatusNotFound
+	case codes.AlreadyExists:
+		return http.StatusConflict
+	case codes.PermissionDenied:
+		return http.StatusForbidden
+	case codes.Unauthenticated:
+		return http.StatusUnauthorized
+	case codes.FailedPrecondition:
+		return http.StatusPreconditionFailed
+	case codes.Unimplemented:
+		return http.StatusNotImplemented
+	case codes.Internal:
+		return http.StatusInternalServerError
+	case codes.Unavailable:
+		return http.StatusServiceUnavailable
+	}
+
+	return http.StatusInternalServerError
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/grpc.go

@@ -0,0 +1,704 @@
+// Package grpc provides a gRPC client
+package grpc
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"reflect"
+	"strings"
+	"sync/atomic"
+	"time"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/client"
+	raw "go-micro.dev/v4/codec/bytes"
+	"go-micro.dev/v4/errors"
+	"go-micro.dev/v4/metadata"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/selector"
+	"go-micro.dev/v4/util/cmd"
+	pnet "go-micro.dev/v4/util/net"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/encoding"
+	gmetadata "google.golang.org/grpc/metadata"
+)
+
+type grpcClient struct {
+	opts client.Options
+	pool *pool
+	once atomic.Value
+}
+
+func init() {
+	cmd.DefaultClients["grpc"] = NewClient
+
+	encoding.RegisterCodec(wrapCodec{jsonCodec{}})
+	encoding.RegisterCodec(wrapCodec{protoCodec{}})
+	encoding.RegisterCodec(wrapCodec{bytesCodec{}})
+}
+
+// secure returns the dial option for whether its a secure or insecure connection.
+func (g *grpcClient) secure(addr string) grpc.DialOption {
+	// first we check if theres'a  tls config
+	if g.opts.Context != nil {
+		if v := g.opts.Context.Value(tlsAuth{}); v != nil {
+			tls := v.(*tls.Config)
+			creds := credentials.NewTLS(tls)
+			// return tls config if it exists
+			return grpc.WithTransportCredentials(creds)
+		}
+	}
+
+	// default config
+	tlsConfig := &tls.Config{}
+	defaultCreds := grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig))
+
+	// check if the address is prepended with https
+	if strings.HasPrefix(addr, "https://") {
+		return defaultCreds
+	}
+
+	// if no port is specified or port is 443 default to tls
+	_, port, err := net.SplitHostPort(addr)
+	// assuming with no port its going to be secured
+	if port == "443" {
+		return defaultCreds
+	} else if err != nil && strings.Contains(err.Error(), "missing port in address") {
+		return defaultCreds
+	}
+
+	// other fallback to insecure
+	return grpc.WithInsecure()
+}
+
+func (g *grpcClient) next(request client.Request, opts client.CallOptions) (selector.Next, error) {
+	service, address, _ := pnet.Proxy(request.Service(), opts.Address)
+
+	// return remote address
+	if len(address) > 0 {
+		return func() (*registry.Node, error) {
+			return &registry.Node{
+				Address: address[0],
+			}, nil
+		}, nil
+	}
+
+	// get next nodes from the selector
+	next, err := g.opts.Selector.Select(service, opts.SelectOptions...)
+	if err != nil {
+		if err == selector.ErrNotFound {
+			return nil, errors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
+		}
+		return nil, errors.InternalServerError("go.micro.client", "error selecting %s node: %s", service, err.Error())
+	}
+
+	return next, nil
+}
+
+func (g *grpcClient) call(ctx context.Context, node *registry.Node, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	var header map[string]string
+
+	address := node.Address
+
+	if md, ok := metadata.FromContext(ctx); ok {
+		header = make(map[string]string, len(md))
+		for k, v := range md {
+			header[strings.ToLower(k)] = v
+		}
+	} else {
+		header = make(map[string]string)
+	}
+
+	// set timeout in nanoseconds
+	header["timeout"] = fmt.Sprintf("%d", opts.RequestTimeout)
+	// set the content type for the request
+	header["x-content-type"] = req.ContentType()
+
+	md := gmetadata.New(header)
+	ctx = gmetadata.NewOutgoingContext(ctx, md)
+
+	cf, err := g.newGRPCCodec(req.ContentType())
+	if err != nil {
+		return errors.InternalServerError("go.micro.client", err.Error())
+	}
+
+	maxRecvMsgSize := g.maxRecvMsgSizeValue()
+	maxSendMsgSize := g.maxSendMsgSizeValue()
+
+	var grr error
+
+	var dialCtx context.Context
+	var cancel context.CancelFunc
+	if opts.DialTimeout > 0 {
+		dialCtx, cancel = context.WithTimeout(ctx, opts.DialTimeout)
+	} else {
+		dialCtx, cancel = context.WithCancel(ctx)
+	}
+	defer cancel()
+
+	grpcDialOptions := []grpc.DialOption{
+		g.secure(address),
+		grpc.WithDefaultCallOptions(
+			grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
+			grpc.MaxCallSendMsgSize(maxSendMsgSize),
+		),
+	}
+
+	if opts := g.getGrpcDialOptions(); opts != nil {
+		grpcDialOptions = append(grpcDialOptions, opts...)
+	}
+
+	cc, err := g.pool.getConn(dialCtx, address, grpcDialOptions...)
+	if err != nil {
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
+	}
+	defer func() {
+		// defer execution of release
+		g.pool.release(address, cc, grr)
+	}()
+
+	ch := make(chan error, 1)
+
+	go func() {
+		grpcCallOptions := []grpc.CallOption{
+			grpc.ForceCodec(cf),
+			grpc.CallContentSubtype(cf.Name())}
+		if opts := callOpts(opts); opts != nil {
+			grpcCallOptions = append(grpcCallOptions, opts...)
+		}
+		err := cc.Invoke(ctx, methodToGRPC(req.Service(), req.Endpoint()), req.Body(), rsp, grpcCallOptions...)
+		ch <- microError(err)
+	}()
+
+	select {
+	case err := <-ch:
+		grr = err
+	case <-ctx.Done():
+		grr = errors.Timeout("go.micro.client", "%v", ctx.Err())
+	}
+
+	return grr
+}
+
+func (g *grpcClient) stream(ctx context.Context, node *registry.Node, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	var header map[string]string
+
+	address := node.Address
+
+	if md, ok := metadata.FromContext(ctx); ok {
+		header = make(map[string]string, len(md))
+		for k, v := range md {
+			header[k] = v
+		}
+	} else {
+		header = make(map[string]string)
+	}
+
+	// set timeout in nanoseconds
+	if opts.StreamTimeout > time.Duration(0) {
+		header["timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
+	}
+	// set the content type for the request
+	header["x-content-type"] = req.ContentType()
+
+	md := gmetadata.New(header)
+	ctx = gmetadata.NewOutgoingContext(ctx, md)
+
+	cf, err := g.newGRPCCodec(req.ContentType())
+	if err != nil {
+		return errors.InternalServerError("go.micro.client", err.Error())
+	}
+
+	var dialCtx context.Context
+	var cancel context.CancelFunc
+	if opts.DialTimeout > 0 {
+		dialCtx, cancel = context.WithTimeout(ctx, opts.DialTimeout)
+	} else {
+		dialCtx, cancel = context.WithCancel(ctx)
+	}
+	defer cancel()
+
+	wc := wrapCodec{cf}
+
+	grpcDialOptions := []grpc.DialOption{
+		g.secure(address),
+	}
+
+	if opts := g.getGrpcDialOptions(); opts != nil {
+		grpcDialOptions = append(grpcDialOptions, opts...)
+	}
+
+	cc, err := g.pool.getConn(dialCtx, address, grpcDialOptions...)
+	if err != nil {
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
+	}
+
+	desc := &grpc.StreamDesc{
+		StreamName:    req.Service() + req.Endpoint(),
+		ClientStreams: true,
+		ServerStreams: true,
+	}
+
+	grpcCallOptions := []grpc.CallOption{
+		grpc.ForceCodec(wc),
+		grpc.CallContentSubtype(cf.Name()),
+	}
+	if opts := callOpts(opts); opts != nil {
+		grpcCallOptions = append(grpcCallOptions, opts...)
+	}
+
+	// create a new canceling context
+	newCtx, cancel := context.WithCancel(ctx)
+
+	st, err := cc.NewStream(newCtx, desc, methodToGRPC(req.Service(), req.Endpoint()), grpcCallOptions...)
+	if err != nil {
+		// we need to cleanup as we dialed and created a context
+		// cancel the context
+		cancel()
+		// close the connection
+		cc.Close()
+		// now return the error
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
+	}
+
+	codec := &grpcCodec{
+		s: st,
+		c: wc,
+	}
+
+	// set request codec
+	if r, ok := req.(*grpcRequest); ok {
+		r.codec = codec
+	}
+
+	// setup the stream response
+	stream := &grpcStream{
+		context: ctx,
+		request: req,
+		response: &response{
+			conn:   cc.ClientConn,
+			stream: st,
+			codec:  cf,
+			gcodec: codec,
+		},
+		stream: st,
+		cancel: cancel,
+		release: func(err error) {
+			g.pool.release(address, cc, err)
+		},
+	}
+
+	// set the stream as the response
+	val := reflect.ValueOf(rsp).Elem()
+	val.Set(reflect.ValueOf(stream).Elem())
+	return nil
+}
+
+func (g *grpcClient) poolMaxStreams() int {
+	if g.opts.Context == nil {
+		return DefaultPoolMaxStreams
+	}
+	v := g.opts.Context.Value(poolMaxStreams{})
+	if v == nil {
+		return DefaultPoolMaxStreams
+	}
+	return v.(int)
+}
+
+func (g *grpcClient) poolMaxIdle() int {
+	if g.opts.Context == nil {
+		return DefaultPoolMaxIdle
+	}
+	v := g.opts.Context.Value(poolMaxIdle{})
+	if v == nil {
+		return DefaultPoolMaxIdle
+	}
+	return v.(int)
+}
+
+func (g *grpcClient) maxRecvMsgSizeValue() int {
+	if g.opts.Context == nil {
+		return DefaultMaxRecvMsgSize
+	}
+	v := g.opts.Context.Value(maxRecvMsgSizeKey{})
+	if v == nil {
+		return DefaultMaxRecvMsgSize
+	}
+	return v.(int)
+}
+
+func (g *grpcClient) maxSendMsgSizeValue() int {
+	if g.opts.Context == nil {
+		return DefaultMaxSendMsgSize
+	}
+	v := g.opts.Context.Value(maxSendMsgSizeKey{})
+	if v == nil {
+		return DefaultMaxSendMsgSize
+	}
+	return v.(int)
+}
+
+func (g *grpcClient) newGRPCCodec(contentType string) (encoding.Codec, error) {
+	codecs := make(map[string]encoding.Codec)
+	if g.opts.Context != nil {
+		if v := g.opts.Context.Value(codecsKey{}); v != nil {
+			codecs = v.(map[string]encoding.Codec)
+		}
+	}
+	if c, ok := codecs[contentType]; ok {
+		return wrapCodec{c}, nil
+	}
+	if c, ok := defaultGRPCCodecs[contentType]; ok {
+		return wrapCodec{c}, nil
+	}
+	return nil, fmt.Errorf("unsupported Content-Type: %s", contentType)
+}
+
+func (g *grpcClient) Init(opts ...client.Option) error {
+	size := g.opts.PoolSize
+	ttl := g.opts.PoolTTL
+
+	for _, o := range opts {
+		o(&g.opts)
+	}
+
+	// update pool configuration if the options changed
+	if size != g.opts.PoolSize || ttl != g.opts.PoolTTL {
+		g.pool.Lock()
+		g.pool.size = g.opts.PoolSize
+		g.pool.ttl = int64(g.opts.PoolTTL.Seconds())
+		g.pool.Unlock()
+	}
+
+	return nil
+}
+
+func (g *grpcClient) Options() client.Options {
+	return g.opts
+}
+
+func (g *grpcClient) NewMessage(topic string, msg interface{}, opts ...client.MessageOption) client.Message {
+	return newGRPCEvent(topic, msg, g.opts.ContentType, opts...)
+}
+
+func (g *grpcClient) NewRequest(service, method string, req interface{}, reqOpts ...client.RequestOption) client.Request {
+	return newGRPCRequest(service, method, req, g.opts.ContentType, reqOpts...)
+}
+
+func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	if req == nil {
+		return errors.InternalServerError("go.micro.client", "req is nil")
+	} else if rsp == nil {
+		return errors.InternalServerError("go.micro.client", "rsp is nil")
+	}
+	// make a copy of call opts
+	callOpts := g.opts.CallOptions
+	for _, opt := range opts {
+		opt(&callOpts)
+	}
+
+	next, err := g.next(req, callOpts)
+	if err != nil {
+		return err
+	}
+
+	// check if we already have a deadline
+	d, ok := ctx.Deadline()
+	if !ok {
+		// no deadline so we create a new one
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
+		defer cancel()
+	} else {
+		// got a deadline so no need to setup context
+		// but we need to set the timeout we pass along
+		opt := client.WithRequestTimeout(time.Until(d))
+		opt(&callOpts)
+	}
+
+	// should we noop right here?
+	select {
+	case <-ctx.Done():
+		return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
+	default:
+	}
+
+	// make copy of call method
+	gcall := g.call
+
+	// wrap the call in reverse
+	for i := len(callOpts.CallWrappers); i > 0; i-- {
+		gcall = callOpts.CallWrappers[i-1](gcall)
+	}
+
+	// return errors.New("go.micro.client", "request timeout", 408)
+	call := func(i int) error {
+		// call backoff first. Someone may want an initial start delay
+		t, err := callOpts.Backoff(ctx, req, i)
+		if err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+
+		// only sleep if greater than 0
+		if t.Seconds() > 0 {
+			time.Sleep(t)
+		}
+
+		// select next node
+		node, err := next()
+		service := req.Service()
+		if err != nil {
+			if err == selector.ErrNotFound {
+				return errors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
+			}
+			return errors.InternalServerError("go.micro.client", "error selecting %s node: %s", service, err.Error())
+		}
+
+		// make the call
+		err = gcall(ctx, node, req, rsp, callOpts)
+		g.opts.Selector.Mark(service, node, err)
+		if verr, ok := err.(*errors.Error); ok {
+			return verr
+		}
+
+		return err
+	}
+
+	ch := make(chan error, callOpts.Retries+1)
+	var gerr error
+
+	for i := 0; i <= callOpts.Retries; i++ {
+		go func(i int) {
+			ch <- call(i)
+		}(i)
+
+		select {
+		case <-ctx.Done():
+			return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
+		case err := <-ch:
+			// if the call succeeded lets bail early
+			if err == nil {
+				return nil
+			}
+
+			retry, rerr := callOpts.Retry(ctx, req, i, err)
+			if rerr != nil {
+				return rerr
+			}
+
+			if !retry {
+				return err
+			}
+
+			gerr = err
+		}
+	}
+
+	return gerr
+}
+
+func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	// make a copy of call opts
+	callOpts := g.opts.CallOptions
+	for _, opt := range opts {
+		opt(&callOpts)
+	}
+
+	next, err := g.next(req, callOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	// #200 - streams shouldn't have a request timeout set on the context
+
+	// should we noop right here?
+	select {
+	case <-ctx.Done():
+		return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
+	default:
+	}
+
+	// make a copy of stream
+	gstream := g.stream
+
+	// wrap the call in reverse
+	for i := len(callOpts.CallWrappers); i > 0; i-- {
+		gstream = callOpts.CallWrappers[i-1](gstream)
+	}
+
+	call := func(i int) (client.Stream, error) {
+		// call backoff first. Someone may want an initial start delay
+		t, err := callOpts.Backoff(ctx, req, i)
+		if err != nil {
+			return nil, errors.InternalServerError("go.micro.client", err.Error())
+		}
+
+		// only sleep if greater than 0
+		if t.Seconds() > 0 {
+			time.Sleep(t)
+		}
+
+		node, err := next()
+		service := req.Service()
+		if err != nil {
+			if err == selector.ErrNotFound {
+				return nil, errors.InternalServerError("go.micro.client", "service %s: %s", service, err.Error())
+			}
+			return nil, errors.InternalServerError("go.micro.client", "error selecting %s node: %s", service, err.Error())
+		}
+
+		// make the call
+		stream := &grpcStream{}
+		err = g.stream(ctx, node, req, stream, callOpts)
+
+		g.opts.Selector.Mark(service, node, err)
+		return stream, err
+	}
+
+	type response struct {
+		stream client.Stream
+		err    error
+	}
+
+	ch := make(chan response, callOpts.Retries+1)
+	var grr error
+
+	for i := 0; i <= callOpts.Retries; i++ {
+		go func(i int) {
+			s, err := call(i)
+			ch <- response{s, err}
+		}(i)
+
+		select {
+		case <-ctx.Done():
+			return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
+		case rsp := <-ch:
+			// if the call succeeded lets bail early
+			if rsp.err == nil {
+				return rsp.stream, nil
+			}
+
+			retry, rerr := callOpts.Retry(ctx, req, i, err)
+			if rerr != nil {
+				return nil, rerr
+			}
+
+			if !retry {
+				return nil, rsp.err
+			}
+
+			grr = rsp.err
+		}
+	}
+
+	return nil, grr
+}
+
+func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	var options client.PublishOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	md, ok := metadata.FromContext(ctx)
+	if !ok {
+		md = make(map[string]string)
+	}
+	md["Content-Type"] = p.ContentType()
+	md["Micro-Topic"] = p.Topic()
+
+	cf, err := g.newGRPCCodec(p.ContentType())
+	if err != nil {
+		return errors.InternalServerError("go.micro.client", err.Error())
+	}
+
+	var body []byte
+
+	// passed in raw data
+	if d, ok := p.Payload().(*raw.Frame); ok {
+		body = d.Data
+	} else {
+		// set the body
+		b, err := cf.Marshal(p.Payload())
+		if err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+		body = b
+	}
+
+	if !g.once.Load().(bool) {
+		if err = g.opts.Broker.Connect(); err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+		g.once.Store(true)
+	}
+
+	topic := p.Topic()
+
+	// get the exchange
+	if len(options.Exchange) > 0 {
+		topic = options.Exchange
+	}
+
+	return g.opts.Broker.Publish(topic, &broker.Message{
+		Header: md,
+		Body:   body,
+	}, broker.PublishContext(options.Context))
+}
+
+func (g *grpcClient) String() string {
+	return "grpc"
+}
+
+func (g *grpcClient) getGrpcDialOptions() []grpc.DialOption {
+	if g.opts.CallOptions.Context == nil {
+		return nil
+	}
+
+	v := g.opts.CallOptions.Context.Value(grpcDialOptions{})
+
+	if v == nil {
+		return nil
+	}
+
+	opts, ok := v.([]grpc.DialOption)
+
+	if !ok {
+		return nil
+	}
+
+	return opts
+}
+
+func newClient(opts ...client.Option) client.Client {
+	options := client.NewOptions()
+	// default content type for grpc
+	options.ContentType = "application/grpc+proto"
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	rc := &grpcClient{
+		opts: options,
+	}
+	rc.once.Store(false)
+
+	rc.pool = newPool(options.PoolSize, options.PoolTTL, rc.poolMaxIdle(), rc.poolMaxStreams())
+
+	c := client.Client(rc)
+
+	// wrap in reverse
+	for i := len(options.Wrappers); i > 0; i-- {
+		c = options.Wrappers[i-1](c)
+	}
+
+	return c
+}
+
+func NewClient(opts ...client.Option) client.Client {
+	return newClient(opts...)
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/grpc_pool.go

@@ -0,0 +1,218 @@
+package grpc
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/connectivity"
+)
+
+type pool struct {
+	size int
+	ttl  int64
+
+	//  max streams on a *poolConn
+	maxStreams int
+	//  max idle conns
+	maxIdle int
+
+	sync.Mutex
+	conns map[string]*streamsPool
+}
+
+type streamsPool struct {
+	//  head of list
+	head *poolConn
+	//  busy conns list
+	busy *poolConn
+	//  the size of list
+	count int
+	//  idle conn
+	idle int
+}
+
+type poolConn struct {
+	//  grpc conn
+	*grpc.ClientConn
+	err  error
+	addr string
+
+	//  pool and streams pool
+	pool    *pool
+	sp      *streamsPool
+	streams int
+	created int64
+
+	//  list
+	pre  *poolConn
+	next *poolConn
+	in   bool
+}
+
+func newPool(size int, ttl time.Duration, idle int, ms int) *pool {
+	if ms <= 0 {
+		ms = 1
+	}
+	if idle < 0 {
+		idle = 0
+	}
+	return &pool{
+		size:       size,
+		ttl:        int64(ttl.Seconds()),
+		maxStreams: ms,
+		maxIdle:    idle,
+		conns:      make(map[string]*streamsPool),
+	}
+}
+
+func (p *pool) getConn(dialCtx context.Context, addr string, opts ...grpc.DialOption) (*poolConn, error) {
+	now := time.Now().Unix()
+	p.Lock()
+	sp, ok := p.conns[addr]
+	if !ok {
+		sp = &streamsPool{head: &poolConn{}, busy: &poolConn{}, count: 0, idle: 0}
+		p.conns[addr] = sp
+	}
+	//  while we have conns check streams and then return one
+	//  otherwise we'll create a new conn
+	conn := sp.head.next
+	for conn != nil {
+		//  check conn state
+		// https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md
+		switch conn.GetState() {
+		case connectivity.Connecting:
+			conn = conn.next
+			continue
+		case connectivity.Shutdown:
+			next := conn.next
+			if conn.streams == 0 {
+				removeConn(conn)
+				sp.idle--
+			}
+			conn = next
+			continue
+		case connectivity.TransientFailure:
+			next := conn.next
+			if conn.streams == 0 {
+				removeConn(conn)
+				conn.ClientConn.Close()
+				sp.idle--
+			}
+			conn = next
+			continue
+		case connectivity.Ready:
+		case connectivity.Idle:
+		}
+		//  a old conn
+		if now-conn.created > p.ttl {
+			next := conn.next
+			if conn.streams == 0 {
+				removeConn(conn)
+				conn.ClientConn.Close()
+				sp.idle--
+			}
+			conn = next
+			continue
+		}
+		//  a busy conn
+		if conn.streams >= p.maxStreams {
+			next := conn.next
+			removeConn(conn)
+			addConnAfter(conn, sp.busy)
+			conn = next
+			continue
+		}
+		//  a idle conn
+		if conn.streams == 0 {
+			sp.idle--
+		}
+		//  a good conn
+		conn.streams++
+		p.Unlock()
+		return conn, nil
+	}
+	p.Unlock()
+
+	//  create new conn
+	cc, err := grpc.DialContext(dialCtx, addr, opts...)
+	if err != nil {
+		return nil, err
+	}
+	conn = &poolConn{cc, nil, addr, p, sp, 1, time.Now().Unix(), nil, nil, false}
+
+	//  add conn to streams pool
+	p.Lock()
+	if sp.count < p.size {
+		addConnAfter(conn, sp.head)
+	}
+	p.Unlock()
+
+	return conn, nil
+}
+
+func (p *pool) release(addr string, conn *poolConn, err error) {
+	p.Lock()
+	p, sp, created := conn.pool, conn.sp, conn.created
+	//  try to add conn
+	if !conn.in && sp.count < p.size {
+		addConnAfter(conn, sp.head)
+	}
+	if !conn.in {
+		p.Unlock()
+		conn.ClientConn.Close()
+		return
+	}
+	//  a busy conn
+	if conn.streams >= p.maxStreams {
+		removeConn(conn)
+		addConnAfter(conn, sp.head)
+	}
+	conn.streams--
+	//  if streams == 0, we can do something
+	if conn.streams == 0 {
+		//  1. it has errored
+		//  2. too many idle conn or
+		//  3. conn is too old
+		now := time.Now().Unix()
+		if err != nil || sp.idle >= p.maxIdle || now-created > p.ttl {
+			removeConn(conn)
+			p.Unlock()
+			conn.ClientConn.Close()
+			return
+		}
+		sp.idle++
+	}
+	p.Unlock()
+}
+
+func (conn *poolConn) Close() {
+	conn.pool.release(conn.addr, conn, conn.err)
+}
+
+func removeConn(conn *poolConn) {
+	if conn.pre != nil {
+		conn.pre.next = conn.next
+	}
+	if conn.next != nil {
+		conn.next.pre = conn.pre
+	}
+	conn.pre = nil
+	conn.next = nil
+	conn.in = false
+	conn.sp.count--
+	return
+}
+
+func addConnAfter(conn *poolConn, after *poolConn) {
+	conn.next = after.next
+	conn.pre = after
+	if after.next != nil {
+		after.next.pre = conn
+	}
+	after.next = conn
+	conn.in = true
+	conn.sp.count++
+	return
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/message.go

@@ -0,0 +1,40 @@
+package grpc
+
+import (
+	"go-micro.dev/v4/client"
+)
+
+type grpcEvent struct {
+	topic       string
+	contentType string
+	payload     interface{}
+}
+
+func newGRPCEvent(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
+	var options client.MessageOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	if len(options.ContentType) > 0 {
+		contentType = options.ContentType
+	}
+
+	return &grpcEvent{
+		payload:     payload,
+		topic:       topic,
+		contentType: contentType,
+	}
+}
+
+func (g *grpcEvent) ContentType() string {
+	return g.contentType
+}
+
+func (g *grpcEvent) Topic() string {
+	return g.topic
+}
+
+func (g *grpcEvent) Payload() interface{} {
+	return g.payload
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/options.go

@@ -0,0 +1,143 @@
+// Package grpc provides a gRPC options
+package grpc
+
+import (
+	"context"
+	"crypto/tls"
+
+	"go-micro.dev/v4/client"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+)
+
+var (
+	// DefaultPoolMaxStreams maximum streams on a connectioin
+	// (20).
+	DefaultPoolMaxStreams = 20
+
+	// DefaultPoolMaxIdle maximum idle conns of a pool
+	// (50).
+	DefaultPoolMaxIdle = 50
+
+	// DefaultMaxRecvMsgSize maximum message that client can receive
+	// (4 MB).
+	DefaultMaxRecvMsgSize = 1024 * 1024 * 4
+
+	// DefaultMaxSendMsgSize maximum message that client can send
+	// (4 MB).
+	DefaultMaxSendMsgSize = 1024 * 1024 * 4
+)
+
+type poolMaxStreams struct{}
+type poolMaxIdle struct{}
+type codecsKey struct{}
+type tlsAuth struct{}
+type maxRecvMsgSizeKey struct{}
+type maxSendMsgSizeKey struct{}
+type grpcDialOptions struct{}
+type grpcCallOptions struct{}
+
+// maximum streams on a connectioin.
+func PoolMaxStreams(n int) client.Option {
+	return func(o *client.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, poolMaxStreams{}, n)
+	}
+}
+
+// maximum idle conns of a pool.
+func PoolMaxIdle(d int) client.Option {
+	return func(o *client.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, poolMaxIdle{}, d)
+	}
+}
+
+// gRPC Codec to be used to encode/decode requests for a given content type.
+func Codec(contentType string, c encoding.Codec) client.Option {
+	return func(o *client.Options) {
+		codecs := make(map[string]encoding.Codec)
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		if v := o.Context.Value(codecsKey{}); v != nil {
+			codecs = v.(map[string]encoding.Codec)
+		}
+		codecs[contentType] = c
+		o.Context = context.WithValue(o.Context, codecsKey{}, codecs)
+	}
+}
+
+// AuthTLS should be used to setup a secure authentication using TLS.
+func AuthTLS(t *tls.Config) client.Option {
+	return func(o *client.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, tlsAuth{}, t)
+	}
+}
+
+// MaxRecvMsgSize set the maximum size of message that client can receive.
+func MaxRecvMsgSize(s int) client.Option {
+	return func(o *client.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, maxRecvMsgSizeKey{}, s)
+	}
+}
+
+// MaxSendMsgSize set the maximum size of message that client can send.
+func MaxSendMsgSize(s int) client.Option {
+	return func(o *client.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, maxSendMsgSizeKey{}, s)
+	}
+}
+
+// DialOptions to be used to configure gRPC dial options.
+func DialOptions(opts ...grpc.DialOption) client.CallOption {
+	return func(o *client.CallOptions) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, grpcDialOptions{}, opts)
+	}
+}
+
+// CallOptions to be used to configure gRPC call options.
+func CallOptions(opts ...grpc.CallOption) client.CallOption {
+	return func(o *client.CallOptions) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, grpcCallOptions{}, opts)
+	}
+}
+
+func callOpts(opts client.CallOptions) []grpc.CallOption {
+	if opts.Context == nil {
+		return nil
+	}
+
+	v := opts.Context.Value(grpcCallOptions{})
+
+	if v == nil {
+		return nil
+	}
+
+	options, ok := v.([]grpc.CallOption)
+
+	if !ok {
+		return nil
+	}
+
+	return options
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/request.go

@@ -0,0 +1,87 @@
+package grpc
+
+import (
+	"fmt"
+	"strings"
+
+	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/codec"
+)
+
+type grpcRequest struct {
+	service     string
+	method      string
+	contentType string
+	request     interface{}
+	opts        client.RequestOptions
+	codec       codec.Codec
+}
+
+// service Struct.Method /service.Struct/Method.
+func methodToGRPC(service, method string) string {
+	// no method or already grpc method
+	if len(method) == 0 || method[0] == '/' {
+		return method
+	}
+
+	// assume method is Foo.Bar
+	mParts := strings.Split(method, ".")
+	if len(mParts) != 2 {
+		return method
+	}
+
+	if len(service) == 0 {
+		return fmt.Sprintf("/%s/%s", mParts[0], mParts[1])
+	}
+
+	// return /pkg.Foo/Bar
+	return fmt.Sprintf("/%s.%s/%s", service, mParts[0], mParts[1])
+}
+
+func newGRPCRequest(service, method string, request interface{}, contentType string, reqOpts ...client.RequestOption) client.Request {
+	var opts client.RequestOptions
+	for _, o := range reqOpts {
+		o(&opts)
+	}
+
+	// set the content-type specified
+	if len(opts.ContentType) > 0 {
+		contentType = opts.ContentType
+	}
+
+	return &grpcRequest{
+		service:     service,
+		method:      method,
+		request:     request,
+		contentType: contentType,
+		opts:        opts,
+	}
+}
+
+func (g *grpcRequest) ContentType() string {
+	return g.contentType
+}
+
+func (g *grpcRequest) Service() string {
+	return g.service
+}
+
+func (g *grpcRequest) Method() string {
+	return g.method
+}
+
+func (g *grpcRequest) Endpoint() string {
+	return g.method
+}
+
+func (g *grpcRequest) Codec() codec.Writer {
+	return g.codec
+}
+
+func (g *grpcRequest) Body() interface{} {
+	return g.request
+}
+
+func (g *grpcRequest) Stream() bool {
+	return g.opts.Stream
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/response.go

@@ -0,0 +1,44 @@
+package grpc
+
+import (
+	"strings"
+
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/codec/bytes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+)
+
+type response struct {
+	conn   *grpc.ClientConn
+	stream grpc.ClientStream
+	codec  encoding.Codec
+	gcodec codec.Codec
+}
+
+// Read the response.
+func (r *response) Codec() codec.Reader {
+	return r.gcodec
+}
+
+// read the header.
+func (r *response) Header() map[string]string {
+	md, err := r.stream.Header()
+	if err != nil {
+		return map[string]string{}
+	}
+	hdr := make(map[string]string, len(md))
+	for k, v := range md {
+		hdr[k] = strings.Join(v, ",")
+	}
+	return hdr
+}
+
+// Read the undecoded response.
+func (r *response) Read() ([]byte, error) {
+	f := &bytes.Frame{}
+	if err := r.gcodec.ReadBody(f); err != nil {
+		return nil, err
+	}
+	return f.Data, nil
+}

vendor/github.com/go-micro/plugins/v4/client/grpc/stream.go

@@ -0,0 +1,84 @@
+package grpc
+
+import (
+	"context"
+	"io"
+	"sync"
+
+	"go-micro.dev/v4/client"
+	"google.golang.org/grpc"
+)
+
+// Implements the streamer interface.
+type grpcStream struct {
+	sync.RWMutex
+	closed   bool
+	err      error
+	stream   grpc.ClientStream
+	request  client.Request
+	response client.Response
+	context  context.Context
+	cancel   func()
+	release  func(error)
+}
+
+func (g *grpcStream) Context() context.Context {
+	return g.context
+}
+
+func (g *grpcStream) Request() client.Request {
+	return g.request
+}
+
+func (g *grpcStream) Response() client.Response {
+	return g.response
+}
+
+func (g *grpcStream) Send(msg interface{}) error {
+	if err := g.stream.SendMsg(msg); err != nil {
+		g.setError(err)
+		return err
+	}
+	return nil
+}
+
+func (g *grpcStream) Recv(msg interface{}) (err error) {
+	if err = g.stream.RecvMsg(msg); err != nil {
+		if err != io.EOF {
+			g.setError(err)
+		}
+		return err
+	}
+	return
+}
+
+func (g *grpcStream) Error() error {
+	g.RLock()
+	defer g.RUnlock()
+	return g.err
+}
+
+func (g *grpcStream) setError(e error) {
+	g.Lock()
+	g.err = e
+	g.Unlock()
+}
+
+func (g *grpcStream) CloseSend() error {
+	return g.stream.CloseSend()
+}
+
+func (g *grpcStream) Close() error {
+	g.Lock()
+	defer g.Unlock()
+
+	if g.closed {
+		return nil
+	}
+	// cancel the context
+	g.cancel()
+	g.closed = true
+	// release back to pool
+	g.release(g.err)
+	return nil
+}

vendor/github.com/go-micro/plugins/v4/events/natsjs/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/events/natsjs/README.md

@@ -0,0 +1,3 @@
+# NATS JetStream
+
+This plugin uses NATS with JetStream to send and receive events.

vendor/github.com/go-micro/plugins/v4/events/natsjs/nats.go

@@ -0,0 +1,220 @@
+package natsjs
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	nats "github.com/nats-io/nats.go"
+	"github.com/pkg/errors"
+
+	"go-micro.dev/v4/events"
+	"go-micro.dev/v4/logger"
+)
+
+const (
+	defaultClusterID = "micro"
+)
+
+// NewStream returns an initialized nats stream or an error if the connection to the nats
+// server could not be established.
+func NewStream(opts ...Option) (events.Stream, error) {
+	// parse the options
+	options := Options{
+		ClientID:  uuid.New().String(),
+		ClusterID: defaultClusterID,
+		Logger:    logger.DefaultLogger,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	s := &stream{opts: options}
+	natsJetStreamCtx, err := connectToNatsJetStream(options)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to nats cluster %v: %v", options.ClusterID, err)
+	}
+	s.natsJetStreamCtx = natsJetStreamCtx
+	return s, nil
+}
+
+type stream struct {
+	opts             Options
+	natsJetStreamCtx nats.JetStreamContext
+}
+
+func connectToNatsJetStream(options Options) (nats.JetStreamContext, error) {
+	nopts := nats.GetDefaultOptions()
+	if options.TLSConfig != nil {
+		nopts.Secure = true
+		nopts.TLSConfig = options.TLSConfig
+	}
+	if len(options.Address) > 0 {
+		nopts.Servers = strings.Split(options.Address, ",")
+	}
+
+	conn, err := nopts.Connect()
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to nats at %v with tls enabled (%v): %v", options.Address, nopts.TLSConfig != nil, err)
+	}
+
+	js, err := conn.JetStream()
+	if err != nil {
+		return nil, fmt.Errorf("error while obtaining JetStream context: %v", err)
+	}
+
+	return js, nil
+}
+
+// Publish a message to a topic.
+func (s *stream) Publish(topic string, msg interface{}, opts ...events.PublishOption) error {
+	// validate the topic
+	if len(topic) == 0 {
+		return events.ErrMissingTopic
+	}
+
+	// parse the options
+	options := events.PublishOptions{
+		Timestamp: time.Now(),
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// encode the message if it's not already encoded
+	var payload []byte
+	if p, ok := msg.([]byte); ok {
+		payload = p
+	} else {
+		p, err := json.Marshal(msg)
+		if err != nil {
+			return events.ErrEncodingMessage
+		}
+		payload = p
+	}
+
+	// construct the event
+	event := &events.Event{
+		ID:        uuid.New().String(),
+		Topic:     topic,
+		Timestamp: options.Timestamp,
+		Metadata:  options.Metadata,
+		Payload:   payload,
+	}
+
+	// serialize the event to bytes
+	bytes, err := json.Marshal(event)
+	if err != nil {
+		return errors.Wrap(err, "Error encoding event")
+	}
+
+	// publish the event to the topic's channel
+	if _, err := s.natsJetStreamCtx.PublishAsync(event.Topic, bytes); err != nil {
+		return errors.Wrap(err, "Error publishing message to topic")
+	}
+
+	return nil
+}
+
+// Consume from a topic.
+func (s *stream) Consume(topic string, opts ...events.ConsumeOption) (<-chan events.Event, error) {
+	// validate the topic
+	if len(topic) == 0 {
+		return nil, events.ErrMissingTopic
+	}
+
+	log := s.opts.Logger
+
+	// parse the options
+	options := events.ConsumeOptions{
+		Group: uuid.New().String(),
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// setup the subscriber
+	c := make(chan events.Event)
+	handleMsg := func(m *nats.Msg) {
+		ctx, cancel := context.WithCancel(context.TODO())
+		defer cancel()
+
+		// decode the message
+		var evt events.Event
+		if err := json.Unmarshal(m.Data, &evt); err != nil {
+			log.Logf(logger.ErrorLevel, "Error decoding message: %v", err)
+			// not acknowledging the message is the way to indicate an error occurred
+			return
+		}
+
+		if !options.AutoAck {
+			// set up the ack funcs
+			evt.SetAckFunc(func() error {
+				return m.Ack()
+			})
+			evt.SetNackFunc(func() error {
+				return m.Nak()
+			})
+		}
+
+		// push onto the channel and wait for the consumer to take the event off before we acknowledge it.
+		c <- evt
+
+		if !options.AutoAck {
+			return
+		}
+		if err := m.Ack(nats.Context(ctx)); err != nil {
+			log.Logf(logger.ErrorLevel, "Error acknowledging message: %v", err)
+		}
+
+	}
+
+	// ensure that a stream exists for that topic
+	_, err := s.natsJetStreamCtx.StreamInfo(topic)
+	if err != nil {
+		cfg := &nats.StreamConfig{
+			Name: topic,
+		}
+
+		_, err = s.natsJetStreamCtx.AddStream(cfg)
+		if err != nil {
+			return nil, errors.Wrap(err, "Stream did not exist and adding a stream failed")
+		}
+	}
+
+	// setup the options
+	subOpts := []nats.SubOpt{
+		nats.Durable(options.Group),
+	}
+
+	if options.CustomRetries {
+		subOpts = append(subOpts, nats.MaxDeliver(options.GetRetryLimit()))
+	}
+
+	if options.AutoAck {
+		subOpts = append(subOpts, nats.AckNone())
+	} else {
+		subOpts = append(subOpts, nats.AckExplicit())
+	}
+
+	if !options.Offset.IsZero() {
+		subOpts = append(subOpts, nats.StartTime(options.Offset))
+	} else {
+		subOpts = append(subOpts, nats.DeliverNew())
+	}
+
+	if options.AckWait > 0 {
+		subOpts = append(subOpts, nats.AckWait(options.AckWait))
+	}
+
+	// connect the subscriber
+	_, err = s.natsJetStreamCtx.QueueSubscribe(topic, options.Group, handleMsg, subOpts...)
+	if err != nil {
+		return nil, errors.Wrap(err, "Error subscribing to topic")
+	}
+
+	return c, nil
+}

vendor/github.com/go-micro/plugins/v4/events/natsjs/options.go

@@ -0,0 +1,54 @@
+package natsjs
+
+import (
+	"crypto/tls"
+
+	"go-micro.dev/v4/logger"
+)
+
+// Options which are used to configure the nats stream.
+type Options struct {
+	ClusterID string
+	ClientID  string
+	Address   string
+	TLSConfig *tls.Config
+	Logger    logger.Logger
+}
+
+// Option is a function which configures options.
+type Option func(o *Options)
+
+// ClusterID sets the cluster id for the nats connection.
+func ClusterID(id string) Option {
+	return func(o *Options) {
+		o.ClusterID = id
+	}
+}
+
+// ClientID sets the client id for the nats connection.
+func ClientID(id string) Option {
+	return func(o *Options) {
+		o.ClientID = id
+	}
+}
+
+// Address of the nats cluster.
+func Address(addr string) Option {
+	return func(o *Options) {
+		o.Address = addr
+	}
+}
+
+// TLSConfig to use when connecting to the cluster.
+func TLSConfig(t *tls.Config) Option {
+	return func(o *Options) {
+		o.TLSConfig = t
+	}
+}
+
+// Logger sets the underlyin logger
+func Logger(log logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = log
+	}
+}

vendor/github.com/go-micro/plugins/v4/logger/zerolog/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/logger/zerolog/README.md

@@ -0,0 +1,16 @@
+# Zerolog
+
+[Zerolog](https://github.com/rs/zerolog) logger implementation for __go-micro__ [meta logger](https://github.com/micro/go-micro/tree/master/logger).
+
+## Usage
+
+```go
+func ExampleWithOut() {
+  logger.DefaultLogger = zerolog.NewLogger(logger.WithOutput(os.Stdout), logger.WithLevel(logger.DebugLevel))
+
+  logger.Infof(logger.InfoLevel, "testing: %s", "Infof")
+
+  // Output:
+  // {"level":"info","message":"testing: Infof"}
+}
+```

vendor/github.com/go-micro/plugins/v4/logger/zerolog/options.go

@@ -0,0 +1,66 @@
+package zerolog
+
+import (
+	"github.com/rs/zerolog"
+
+	"go-micro.dev/v4/logger"
+)
+
+type Options struct {
+	logger.Options
+
+	// Flag for whether to log caller info (off by default)
+	ReportCaller bool
+	// Use this logger as system wide default logger  (off by default)
+	UseAsDefault bool
+	// zerolog hooks
+	Hooks []zerolog.Hook
+	// TimeFormat is one of time.RFC3339, time.RFC3339Nano, time.*
+	TimeFormat string
+	// Runtime mode. (Production by default)
+	Mode Mode
+	// Exit Function to call when FatalLevel log
+	ExitFunc func(int)
+}
+
+type reportCallerKey struct{}
+
+func ReportCaller() logger.Option {
+	return logger.SetOption(reportCallerKey{}, true)
+}
+
+type useAsDefaultKey struct{}
+
+func UseAsDefault() logger.Option {
+	return logger.SetOption(useAsDefaultKey{}, true)
+}
+
+type developmentModeKey struct{}
+
+func WithDevelopmentMode() logger.Option {
+	return logger.SetOption(developmentModeKey{}, true)
+}
+
+type productionModeKey struct{}
+
+func WithProductionMode() logger.Option {
+	return logger.SetOption(productionModeKey{}, true)
+}
+
+type timeFormatKey struct{}
+
+func WithTimeFormat(timeFormat string) logger.Option {
+	return logger.SetOption(timeFormatKey{}, timeFormat)
+}
+
+type hooksKey struct{}
+
+func WithHooks(hooks []zerolog.Hook) logger.Option {
+	return logger.SetOption(hooksKey{}, hooks)
+}
+
+type exitKey struct{}
+
+func WithExitFunc(exit func(int)) logger.Option {
+	return logger.SetOption(exitKey{}, exit)
+}

vendor/github.com/go-micro/plugins/v4/logger/zerolog/zerolog.go

@@ -0,0 +1,218 @@
+package zerolog
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"runtime/debug"
+	"time"
+
+	"github.com/rs/zerolog"
+	zlog "github.com/rs/zerolog/log"
+	"github.com/rs/zerolog/pkgerrors"
+
+	"go-micro.dev/v4/logger"
+)
+
+type Mode uint8
+
+const (
+	Production Mode = iota
+	Development
+)
+
+type zeroLogger struct {
+	zLog zerolog.Logger
+	opts Options
+}
+
+func (l *zeroLogger) Init(opts ...logger.Option) error {
+	for _, o := range opts {
+		o(&l.opts.Options)
+	}
+
+	if hs, ok := l.opts.Context.Value(hooksKey{}).([]zerolog.Hook); ok {
+		l.opts.Hooks = hs
+	}
+	if tf, ok := l.opts.Context.Value(timeFormatKey{}).(string); ok {
+		l.opts.TimeFormat = tf
+	}
+	if exitFunction, ok := l.opts.Context.Value(exitKey{}).(func(int)); ok {
+		l.opts.ExitFunc = exitFunction
+	}
+	if caller, ok := l.opts.Context.Value(reportCallerKey{}).(bool); ok && caller {
+		l.opts.ReportCaller = caller
+	}
+	if useDefault, ok := l.opts.Context.Value(useAsDefaultKey{}).(bool); ok && useDefault {
+		l.opts.UseAsDefault = useDefault
+	}
+	if devMode, ok := l.opts.Context.Value(developmentModeKey{}).(bool); ok && devMode {
+		l.opts.Mode = Development
+	}
+	if prodMode, ok := l.opts.Context.Value(productionModeKey{}).(bool); ok && prodMode {
+		l.opts.Mode = Production
+	}
+
+	skip := 4
+	if l.opts.CallerSkipCount > 0 {
+		skip = l.opts.CallerSkipCount
+	}
+	// RESET
+	zerolog.TimeFieldFormat = time.RFC3339
+	zerolog.ErrorStackMarshaler = nil
+	zerolog.CallerSkipFrameCount = skip
+
+	switch l.opts.Mode {
+	case Development:
+		zerolog.ErrorStackMarshaler = func(err error) interface{} {
+			fmt.Println(string(debug.Stack()))
+			return nil
+		}
+		consOut := zerolog.NewConsoleWriter(
+			func(w *zerolog.ConsoleWriter) {
+				if len(l.opts.TimeFormat) > 0 {
+					w.TimeFormat = l.opts.TimeFormat
+				}
+				w.Out = l.opts.Out
+				w.NoColor = false
+			},
+		)
+		// level = logger.DebugLevel
+		l.zLog = zerolog.New(consOut).
+			Level(zerolog.DebugLevel).
+			With().Timestamp().Stack().Logger()
+	default: // Production
+		zerolog.ErrorStackMarshaler = pkgerrors.MarshalStack
+		l.zLog = zerolog.New(l.opts.Out).
+			Level(zerolog.InfoLevel).
+			With().Timestamp().Stack().Logger()
+	}
+
+	// Set log Level if not default
+	if l.opts.Level != 100 {
+		zerolog.SetGlobalLevel(loggerToZerologLevel(l.opts.Level))
+		l.zLog = l.zLog.Level(loggerToZerologLevel(l.opts.Level))
+	}
+
+	// Reporting caller
+	if l.opts.ReportCaller {
+		l.zLog = l.zLog.With().Caller().Logger()
+	}
+
+	// Adding hooks if exist
+	for _, hook := range l.opts.Hooks {
+		l.zLog = l.zLog.Hook(hook)
+	}
+
+	// Setting timeFormat
+	if len(l.opts.TimeFormat) > 0 {
+		zerolog.TimeFieldFormat = l.opts.TimeFormat
+	}
+
+	// Adding seed fields if exist
+	if l.opts.Fields != nil {
+		l.zLog = l.zLog.With().Fields(l.opts.Fields).Logger()
+	}
+
+	// Also set it as zerolog's Default logger
+	if l.opts.UseAsDefault {
+		zlog.Logger = l.zLog
+	}
+
+	return nil
+}
+
+func (l *zeroLogger) Fields(fields map[string]interface{}) logger.Logger {
+	l.zLog = l.zLog.With().Fields(fields).Logger()
+	return l
+}
+
+func (l *zeroLogger) Error(err error) logger.Logger {
+	l.zLog = l.zLog.With().Fields(map[string]interface{}{zerolog.ErrorFieldName: err}).Logger()
+	return l
+}
+
+func (l *zeroLogger) Log(level logger.Level, args ...interface{}) {
+	msg := fmt.Sprint(args...)
+	l.zLog.WithLevel(loggerToZerologLevel(level)).Msg(msg)
+	// Invoke os.Exit because unlike zerolog.Logger.Fatal zerolog.Logger.WithLevel won't stop the execution.
+	if level == logger.FatalLevel {
+		l.opts.ExitFunc(1)
+	}
+}
+
+func (l *zeroLogger) Logf(level logger.Level, format string, args ...interface{}) {
+	l.zLog.WithLevel(loggerToZerologLevel(level)).Msgf(format, args...)
+	// Invoke os.Exit because unlike zerolog.Logger.Fatal zerolog.Logger.WithLevel won't stop the execution.
+	if level == logger.FatalLevel {
+		l.opts.ExitFunc(1)
+	}
+}
+
+func (l *zeroLogger) String() string {
+	return "zerolog"
+}
+
+func (l *zeroLogger) Options() logger.Options {
+	// FIXME: How to return full opts?
+	return l.opts.Options
+}
+
+// NewLogger builds a new logger based on options.
+func NewLogger(opts ...logger.Option) logger.Logger {
+	// Default options
+	options := Options{
+		Options: logger.Options{
+			Level:   100,
+			Fields:  make(map[string]interface{}),
+			Out:     os.Stderr,
+			Context: context.Background(),
+		},
+		ReportCaller: false,
+		UseAsDefault: false,
+		Mode:         Production,
+		ExitFunc:     os.Exit,
+	}
+
+	l := &zeroLogger{opts: options}
+	_ = l.Init(opts...)
+	return l
+}
+
+func loggerToZerologLevel(level logger.Level) zerolog.Level {
+	switch level {
+	case logger.TraceLevel:
+		return zerolog.TraceLevel
+	case logger.DebugLevel:
+		return zerolog.DebugLevel
+	case logger.InfoLevel:
+		return zerolog.InfoLevel
+	case logger.WarnLevel:
+		return zerolog.WarnLevel
+	case logger.ErrorLevel:
+		return zerolog.ErrorLevel
+	case logger.FatalLevel:
+		return zerolog.FatalLevel
+	default:
+		return zerolog.InfoLevel
+	}
+}
+
+func ZerologToLoggerLevel(level zerolog.Level) logger.Level {
+	switch level {
+	case zerolog.TraceLevel:
+		return logger.TraceLevel
+	case zerolog.DebugLevel:
+		return logger.DebugLevel
+	case zerolog.InfoLevel:
+		return logger.InfoLevel
+	case zerolog.WarnLevel:
+		return logger.WarnLevel
+	case zerolog.ErrorLevel:
+		return logger.ErrorLevel
+	case zerolog.FatalLevel:
+		return logger.FatalLevel
+	default:
+		return logger.InfoLevel
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/consul/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/consul/consul.go

@@ -0,0 +1,465 @@
+package consul
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	consul "github.com/hashicorp/consul/api"
+	hash "github.com/mitchellh/hashstructure"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/util/cmd"
+	mnet "go-micro.dev/v4/util/net"
+)
+
+type consulRegistry struct {
+	Address []string
+	opts    registry.Options
+
+	client *consul.Client
+	config *consul.Config
+
+	// connect enabled
+	connect bool
+
+	queryOptions *consul.QueryOptions
+
+	sync.Mutex
+	register map[string]uint64
+	// lastChecked tracks when a node was last checked as existing in Consul
+	lastChecked map[string]time.Time
+}
+
+func init() {
+	cmd.DefaultRegistries["consul"] = NewRegistry
+}
+
+func getDeregisterTTL(t time.Duration) time.Duration {
+	// splay slightly for the watcher?
+	splay := time.Second * 5
+	deregTTL := t + splay
+
+	// consul has a minimum timeout on deregistration of 1 minute.
+	if t < time.Minute {
+		deregTTL = time.Minute + splay
+	}
+
+	return deregTTL
+}
+
+func newTransport(config *tls.Config) *http.Transport {
+	if config == nil {
+		config = &tls.Config{
+			InsecureSkipVerify: true,
+		}
+	}
+
+	t := &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		Dial: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).Dial,
+		TLSHandshakeTimeout: 10 * time.Second,
+		TLSClientConfig:     config,
+	}
+	runtime.SetFinalizer(&t, func(tr **http.Transport) {
+		(*tr).CloseIdleConnections()
+	})
+	return t
+}
+
+func configure(c *consulRegistry, opts ...registry.Option) {
+	// set opts
+	for _, o := range opts {
+		o(&c.opts)
+	}
+
+	// use default non pooled config
+	config := consul.DefaultNonPooledConfig()
+
+	if c.opts.Context != nil {
+		// Use the consul config passed in the options, if available
+		if co, ok := c.opts.Context.Value("consul_config").(*consul.Config); ok {
+			config = co
+		}
+		if cn, ok := c.opts.Context.Value("consul_connect").(bool); ok {
+			c.connect = cn
+		}
+
+		// Use the consul query options passed in the options, if available
+		if qo, ok := c.opts.Context.Value("consul_query_options").(*consul.QueryOptions); ok && qo != nil {
+			c.queryOptions = qo
+		}
+		if as, ok := c.opts.Context.Value("consul_allow_stale").(bool); ok {
+			c.queryOptions.AllowStale = as
+		}
+	}
+
+	// check if there are any addrs
+	var addrs []string
+
+	// iterate the options addresses
+	for _, address := range c.opts.Addrs {
+		// check we have a port
+		addr, port, err := net.SplitHostPort(address)
+		if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
+			port = "8500"
+			addr = address
+			addrs = append(addrs, net.JoinHostPort(addr, port))
+		} else if err == nil {
+			addrs = append(addrs, net.JoinHostPort(addr, port))
+		}
+	}
+
+	// set the addrs
+	if len(addrs) > 0 {
+		c.Address = addrs
+		config.Address = c.Address[0]
+	}
+
+	if config.HttpClient == nil {
+		config.HttpClient = new(http.Client)
+	}
+
+	// requires secure connection?
+	if c.opts.Secure || c.opts.TLSConfig != nil {
+		config.Scheme = "https"
+		// We're going to support InsecureSkipVerify
+		config.HttpClient.Transport = newTransport(c.opts.TLSConfig)
+	}
+
+	// set timeout
+	if c.opts.Timeout > 0 {
+		config.HttpClient.Timeout = c.opts.Timeout
+	}
+
+	// set the config
+	c.config = config
+
+	// remove client
+	c.client = nil
+
+	// setup the client
+	c.Client()
+}
+
+func (c *consulRegistry) Init(opts ...registry.Option) error {
+	configure(c, opts...)
+	return nil
+}
+
+func (c *consulRegistry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
+	if len(s.Nodes) == 0 {
+		return errors.New("Require at least one node")
+	}
+
+	// delete our hash and time check of the service
+	c.Lock()
+	delete(c.register, s.Name)
+	delete(c.lastChecked, s.Name)
+	c.Unlock()
+
+	node := s.Nodes[0]
+	return c.Client().Agent().ServiceDeregister(node.Id)
+}
+
+func (c *consulRegistry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
+	if len(s.Nodes) == 0 {
+		return errors.New("Require at least one node")
+	}
+
+	var regTCPCheck bool
+	var regInterval time.Duration
+	var regHTTPCheck bool
+	var httpCheckConfig consul.AgentServiceCheck
+
+	var options registry.RegisterOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	if c.opts.Context != nil {
+		if tcpCheckInterval, ok := c.opts.Context.Value("consul_tcp_check").(time.Duration); ok {
+			regTCPCheck = true
+			regInterval = tcpCheckInterval
+		}
+		var ok bool
+		if httpCheckConfig, ok = c.opts.Context.Value("consul_http_check_config").(consul.AgentServiceCheck); ok {
+			regHTTPCheck = true
+		}
+	}
+
+	// create hash of service; uint64
+	h, err := hash.Hash(s, nil)
+	if err != nil {
+		return err
+	}
+
+	// use first node
+	node := s.Nodes[0]
+
+	// get existing hash and last checked time
+	c.Lock()
+	v, ok := c.register[s.Name]
+	lastChecked := c.lastChecked[s.Name]
+	c.Unlock()
+
+	// if it's already registered and matches then just pass the check
+	if ok && v == h {
+		if options.TTL == time.Duration(0) {
+			// ensure that our service hasn't been deregistered by Consul
+			if time.Since(lastChecked) <= getDeregisterTTL(regInterval) {
+				return nil
+			}
+			services, _, err := c.Client().Health().Checks(s.Name, c.queryOptions)
+			if err == nil {
+				for _, v := range services {
+					if v.ServiceID == node.Id {
+						return nil
+					}
+				}
+			}
+		} else {
+			// if the err is nil we're all good, bail out
+			// if not, we don't know what the state is, so full re-register
+			if err := c.Client().Agent().PassTTL("service:"+node.Id, ""); err == nil {
+				return nil
+			}
+		}
+	}
+
+	// encode the tags
+	tags := encodeMetadata(node.Metadata)
+	tags = append(tags, encodeEndpoints(s.Endpoints)...)
+	tags = append(tags, encodeVersion(s.Version)...)
+
+	var check *consul.AgentServiceCheck
+
+	if regTCPCheck {
+		deregTTL := getDeregisterTTL(regInterval)
+
+		check = &consul.AgentServiceCheck{
+			TCP:                            node.Address,
+			Interval:                       fmt.Sprintf("%v", regInterval),
+			DeregisterCriticalServiceAfter: fmt.Sprintf("%v", deregTTL),
+		}
+
+	} else if regHTTPCheck {
+		interval, _ := time.ParseDuration(httpCheckConfig.Interval)
+		deregTTL := getDeregisterTTL(interval)
+
+		host, _, _ := net.SplitHostPort(node.Address)
+		healthCheckURI := strings.Replace(httpCheckConfig.HTTP, "{host}", host, 1)
+
+		check = &consul.AgentServiceCheck{
+			HTTP:                           healthCheckURI,
+			Interval:                       httpCheckConfig.Interval,
+			Timeout:                        httpCheckConfig.Timeout,
+			DeregisterCriticalServiceAfter: fmt.Sprintf("%v", deregTTL),
+		}
+
+		// if the TTL is greater than 0 create an associated check
+	} else if options.TTL > time.Duration(0) {
+		deregTTL := getDeregisterTTL(options.TTL)
+
+		check = &consul.AgentServiceCheck{
+			TTL:                            fmt.Sprintf("%v", options.TTL),
+			DeregisterCriticalServiceAfter: fmt.Sprintf("%v", deregTTL),
+		}
+	}
+
+	host, pt, _ := net.SplitHostPort(node.Address)
+	if host == "" {
+		host = node.Address
+	}
+	port, _ := strconv.Atoi(pt)
+
+	// register the service
+	asr := &consul.AgentServiceRegistration{
+		ID:      node.Id,
+		Name:    s.Name,
+		Tags:    tags,
+		Port:    port,
+		Address: host,
+		Meta:    node.Metadata,
+		Check:   check,
+	}
+
+	// Specify consul connect
+	if c.connect {
+		asr.Connect = &consul.AgentServiceConnect{
+			Native: true,
+		}
+	}
+
+	if err := c.Client().Agent().ServiceRegister(asr); err != nil {
+		return err
+	}
+
+	// save our hash and time check of the service
+	c.Lock()
+	c.register[s.Name] = h
+	c.lastChecked[s.Name] = time.Now()
+	c.Unlock()
+
+	// if the TTL is 0 we don't mess with the checks
+	if options.TTL == time.Duration(0) {
+		return nil
+	}
+
+	// pass the healthcheck
+	return c.Client().Agent().PassTTL("service:"+node.Id, "")
+}
+
+func (c *consulRegistry) GetService(name string, opts ...registry.GetOption) ([]*registry.Service, error) {
+	var rsp []*consul.ServiceEntry
+	var err error
+
+	// if we're connect enabled only get connect services
+	if c.connect {
+		rsp, _, err = c.Client().Health().Connect(name, "", false, c.queryOptions)
+	} else {
+		rsp, _, err = c.Client().Health().Service(name, "", false, c.queryOptions)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	serviceMap := map[string]*registry.Service{}
+
+	for _, s := range rsp {
+		if s.Service.Service != name {
+			continue
+		}
+
+		// version is now a tag
+		version, _ := decodeVersion(s.Service.Tags)
+		// service ID is now the node id
+		id := s.Service.ID
+		// key is always the version
+		key := version
+
+		// address is service address
+		address := s.Service.Address
+
+		// use node address
+		if len(address) == 0 {
+			address = s.Node.Address
+		}
+
+		svc, ok := serviceMap[key]
+		if !ok {
+			svc = &registry.Service{
+				Endpoints: decodeEndpoints(s.Service.Tags),
+				Name:      s.Service.Service,
+				Version:   version,
+			}
+			serviceMap[key] = svc
+		}
+
+		var del bool
+
+		for _, check := range s.Checks {
+			// delete the node if the status is critical
+			if check.Status == "critical" {
+				del = true
+				break
+			}
+		}
+
+		// if delete then skip the node
+		if del {
+			continue
+		}
+
+		svc.Nodes = append(svc.Nodes, &registry.Node{
+			Id:       id,
+			Address:  mnet.HostPort(address, s.Service.Port),
+			Metadata: decodeMetadata(s.Service.Tags),
+		})
+	}
+
+	var services []*registry.Service
+	for _, service := range serviceMap {
+		services = append(services, service)
+	}
+	return services, nil
+}
+
+func (c *consulRegistry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
+	rsp, _, err := c.Client().Catalog().Services(c.queryOptions)
+	if err != nil {
+		return nil, err
+	}
+
+	var services []*registry.Service
+
+	for service := range rsp {
+		services = append(services, &registry.Service{Name: service})
+	}
+
+	return services, nil
+}
+
+func (c *consulRegistry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
+	return newConsulWatcher(c, opts...)
+}
+
+func (c *consulRegistry) String() string {
+	return "consul"
+}
+
+func (c *consulRegistry) Options() registry.Options {
+	return c.opts
+}
+
+func (c *consulRegistry) Client() *consul.Client {
+	if c.client != nil {
+		return c.client
+	}
+
+	for _, addr := range c.Address {
+		// set the address
+		c.config.Address = addr
+
+		// create a new client
+		tmpClient, _ := consul.NewClient(c.config)
+
+		// test the client
+		_, err := tmpClient.Agent().Host()
+		if err != nil {
+			continue
+		}
+
+		// set the client
+		c.client = tmpClient
+		return c.client
+	}
+
+	// set the default
+	c.client, _ = consul.NewClient(c.config)
+
+	// return the client
+	return c.client
+}
+
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	cr := &consulRegistry{
+		opts:        registry.Options{},
+		register:    make(map[string]uint64),
+		lastChecked: make(map[string]time.Time),
+		queryOptions: &consul.QueryOptions{
+			AllowStale: true,
+		},
+	}
+	configure(cr, opts...)
+	return cr
+}

vendor/github.com/go-micro/plugins/v4/registry/consul/encoding.go

@@ -0,0 +1,171 @@
+package consul
+
+import (
+	"bytes"
+	"compress/zlib"
+	"encoding/hex"
+	"encoding/json"
+	"io"
+
+	"go-micro.dev/v4/registry"
+)
+
+func encode(buf []byte) string {
+	var b bytes.Buffer
+	defer b.Reset()
+
+	w := zlib.NewWriter(&b)
+	if _, err := w.Write(buf); err != nil {
+		return ""
+	}
+	w.Close()
+
+	return hex.EncodeToString(b.Bytes())
+}
+
+func decode(d string) []byte {
+	hr, err := hex.DecodeString(d)
+	if err != nil {
+		return nil
+	}
+
+	br := bytes.NewReader(hr)
+	zr, err := zlib.NewReader(br)
+	if err != nil {
+		return nil
+	}
+
+	rbuf, err := io.ReadAll(zr)
+	if err != nil {
+		return nil
+	}
+	zr.Close()
+
+	return rbuf
+}
+
+func encodeEndpoints(en []*registry.Endpoint) []string {
+	var tags []string
+	for _, e := range en {
+		if b, err := json.Marshal(e); err == nil {
+			tags = append(tags, "e-"+encode(b))
+		}
+	}
+	return tags
+}
+
+func decodeEndpoints(tags []string) []*registry.Endpoint {
+	var en []*registry.Endpoint
+
+	// use the first format you find
+	var ver byte
+
+	for _, tag := range tags {
+		if len(tag) == 0 || tag[0] != 'e' {
+			continue
+		}
+
+		// check version
+		if ver > 0 && tag[1] != ver {
+			continue
+		}
+
+		var e *registry.Endpoint
+		var buf []byte
+
+		// Old encoding was plain
+		if tag[1] == '=' {
+			buf = []byte(tag[2:])
+		}
+
+		// New encoding is hex
+		if tag[1] == '-' {
+			buf = decode(tag[2:])
+		}
+
+		if err := json.Unmarshal(buf, &e); err == nil {
+			en = append(en, e)
+		}
+
+		// set version
+		ver = tag[1]
+	}
+	return en
+}
+
+func encodeMetadata(md map[string]string) []string {
+	var tags []string
+	for k, v := range md {
+		if b, err := json.Marshal(map[string]string{
+			k: v,
+		}); err == nil {
+			// new encoding
+			tags = append(tags, "t-"+encode(b))
+		}
+	}
+	return tags
+}
+
+func decodeMetadata(tags []string) map[string]string {
+	md := make(map[string]string)
+
+	var ver byte
+
+	for _, tag := range tags {
+		if len(tag) == 0 || tag[0] != 't' {
+			continue
+		}
+
+		// check version
+		if ver > 0 && tag[1] != ver {
+			continue
+		}
+
+		var kv map[string]string
+		var buf []byte
+
+		// Old encoding was plain
+		if tag[1] == '=' {
+			buf = []byte(tag[2:])
+		}
+
+		// New encoding is hex
+		if tag[1] == '-' {
+			buf = decode(tag[2:])
+		}
+
+		// Now unmarshal
+		if err := json.Unmarshal(buf, &kv); err == nil {
+			for k, v := range kv {
+				md[k] = v
+			}
+		}
+
+		// set version
+		ver = tag[1]
+	}
+	return md
+}
+
+func encodeVersion(v string) []string {
+	return []string{"v-" + encode([]byte(v))}
+}
+
+func decodeVersion(tags []string) (string, bool) {
+	for _, tag := range tags {
+		if len(tag) < 2 || tag[0] != 'v' {
+			continue
+		}
+
+		// Old encoding was plain
+		if tag[1] == '=' {
+			return tag[2:], true
+		}
+
+		// New encoding is hex
+		if tag[1] == '-' {
+			return string(decode(tag[2:])), true
+		}
+	}
+	return "", false
+}

vendor/github.com/go-micro/plugins/v4/registry/consul/options.go

@@ -0,0 +1,101 @@
+package consul
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	consul "github.com/hashicorp/consul/api"
+	"go-micro.dev/v4/registry"
+)
+
+// Connect specifies services should be registered as Consul Connect services.
+func Connect() registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, "consul_connect", true)
+	}
+}
+
+func Config(c *consul.Config) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, "consul_config", c)
+	}
+}
+
+// AllowStale sets whether any Consul server (non-leader) can service
+// a read. This allows for lower latency and higher throughput
+// at the cost of potentially stale data.
+// Works similar to Consul DNS Config option [1].
+// Defaults to true.
+//
+// [1] https://www.consul.io/docs/agent/options.html#allow_stale
+func AllowStale(v bool) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, "consul_allow_stale", v)
+	}
+}
+
+// QueryOptions specifies the QueryOptions to be used when calling
+// Consul. See `Consul API` for more information [1].
+//
+// [1] https://godoc.org/github.com/hashicorp/consul/api#QueryOptions
+func QueryOptions(q *consul.QueryOptions) registry.Option {
+	return func(o *registry.Options) {
+		if q == nil {
+			return
+		}
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, "consul_query_options", q)
+	}
+}
+
+// TCPCheck will tell the service provider to check the service address
+// and port every `t` interval. It will enabled only if `t` is greater than 0.
+// See `TCP + Interval` for more information [1].
+//
+// [1] https://www.consul.io/docs/agent/checks.html
+func TCPCheck(t time.Duration) registry.Option {
+	return func(o *registry.Options) {
+		if t <= time.Duration(0) {
+			return
+		}
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, "consul_tcp_check", t)
+	}
+}
+
+// HTTPCheck will tell the service provider to invoke the health check endpoint
+// with an interval and timeout. It will be enabled only if interval and
+// timeout are greater than 0.
+// See `HTTP + Interval` for more information [1].
+//
+// [1] https://www.consul.io/docs/agent/checks.html
+func HTTPCheck(protocol, port, httpEndpoint string, interval, timeout time.Duration) registry.Option {
+	return func(o *registry.Options) {
+		if interval <= time.Duration(0) || timeout <= time.Duration(0) {
+			return
+		}
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		check := consul.AgentServiceCheck{
+			HTTP:     fmt.Sprintf("%s://{host}:%s%s", protocol, port, httpEndpoint),
+			Interval: fmt.Sprintf("%v", interval),
+			Timeout:  fmt.Sprintf("%v", timeout),
+		}
+		o.Context = context.WithValue(o.Context, "consul_http_check_config", check)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/consul/watcher.go

@@ -0,0 +1,290 @@
+package consul
+
+import (
+	"fmt"
+	"net"
+	"sync"
+
+	"github.com/hashicorp/consul/api"
+	"github.com/hashicorp/consul/api/watch"
+	"go-micro.dev/v4/registry"
+	regutil "go-micro.dev/v4/util/registry"
+)
+
+type consulWatcher struct {
+	r        *consulRegistry
+	wo       registry.WatchOptions
+	wp       *watch.Plan
+	watchers map[string]*watch.Plan
+
+	next chan *registry.Result
+	exit chan bool
+
+	sync.RWMutex
+	services map[string][]*registry.Service
+}
+
+func newConsulWatcher(cr *consulRegistry, opts ...registry.WatchOption) (registry.Watcher, error) {
+	var wo registry.WatchOptions
+	for _, o := range opts {
+		o(&wo)
+	}
+
+	cw := &consulWatcher{
+		r:        cr,
+		wo:       wo,
+		exit:     make(chan bool),
+		next:     make(chan *registry.Result, 10),
+		watchers: make(map[string]*watch.Plan),
+		services: make(map[string][]*registry.Service),
+	}
+
+	wp, err := watch.Parse(map[string]interface{}{
+		"service": wo.Service,
+		"type":    "service",
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	wp.Handler = cw.handle
+	go wp.RunWithClientAndHclog(cr.Client(), wp.Logger)
+	cw.wp = wp
+
+	return cw, nil
+}
+
+func (cw *consulWatcher) serviceHandler(idx uint64, data interface{}) {
+	entries, ok := data.([]*api.ServiceEntry)
+	if !ok {
+		return
+	}
+
+	serviceMap := map[string]*registry.Service{}
+	serviceName := ""
+
+	for _, e := range entries {
+		serviceName = e.Service.Service
+		// version is now a tag
+		version, _ := decodeVersion(e.Service.Tags)
+		// service ID is now the node id
+		id := e.Service.ID
+		// key is always the version
+		key := version
+		// address is service address
+		address := e.Service.Address
+
+		// use node address
+		if len(address) == 0 {
+			address = e.Node.Address
+		}
+
+		svc, ok := serviceMap[key]
+		if !ok {
+			svc = &registry.Service{
+				Endpoints: decodeEndpoints(e.Service.Tags),
+				Name:      e.Service.Service,
+				Version:   version,
+			}
+			serviceMap[key] = svc
+		}
+
+		var del bool
+
+		for _, check := range e.Checks {
+			// delete the node if the status is critical
+			if check.Status == "critical" {
+				del = true
+				break
+			}
+		}
+
+		// if delete then skip the node
+		if del {
+			continue
+		}
+
+		svc.Nodes = append(svc.Nodes, &registry.Node{
+			Id:       id,
+			Address:  net.JoinHostPort(address, fmt.Sprint(e.Service.Port)),
+			Metadata: decodeMetadata(e.Service.Tags),
+		})
+	}
+
+	cw.RLock()
+	// make a copy
+	rservices := make(map[string][]*registry.Service)
+	for k, v := range cw.services {
+		rservices[k] = v
+	}
+	cw.RUnlock()
+
+	var newServices []*registry.Service
+
+	// serviceMap is the new set of services keyed by name+version
+	for _, newService := range serviceMap {
+		// append to the new set of cached services
+		newServices = append(newServices, newService)
+
+		// check if the service exists in the existing cache
+		oldServices, ok := rservices[serviceName]
+		if !ok {
+			// does not exist? then we're creating brand new entries
+			cw.next <- &registry.Result{Action: "create", Service: newService}
+			continue
+		}
+
+		// service exists. ok let's figure out what to update and delete version wise
+		action := "create"
+
+		for _, oldService := range oldServices {
+			// does this version exist?
+			// no? then default to create
+			if oldService.Version != newService.Version {
+				continue
+			}
+
+			// yes? then it's an update
+			action = "update"
+
+			var nodes []*registry.Node
+			// check the old nodes to see if they've been deleted
+			for _, oldNode := range oldService.Nodes {
+				var seen bool
+				for _, newNode := range newService.Nodes {
+					if newNode.Id == oldNode.Id {
+						seen = true
+						break
+					}
+				}
+				// does the old node exist in the new set of nodes
+				// no? then delete that shit
+				if !seen {
+					nodes = append(nodes, oldNode)
+				}
+			}
+
+			// it's an update rather than creation
+			if len(nodes) > 0 {
+				delService := regutil.CopyService(oldService)
+				delService.Nodes = nodes
+				cw.next <- &registry.Result{Action: "delete", Service: delService}
+			}
+		}
+
+		cw.next <- &registry.Result{Action: action, Service: newService}
+	}
+
+	// Now check old versions that may not be in new services map
+	for _, old := range rservices[serviceName] {
+		// old version does not exist in new version map
+		// kill it with fire!
+		if _, ok := serviceMap[old.Version]; !ok {
+			cw.next <- &registry.Result{Action: "delete", Service: old}
+		}
+	}
+
+	cw.Lock()
+	cw.services[serviceName] = newServices
+	cw.Unlock()
+}
+
+func (cw *consulWatcher) handle(idx uint64, data interface{}) {
+	services, ok := data.(map[string][]string)
+	if !ok {
+		return
+	}
+
+	// add new watchers
+	for service := range services {
+		// Filter on watch options
+		// wo.Service: Only watch services we care about
+		if len(cw.wo.Service) > 0 && service != cw.wo.Service {
+			continue
+		}
+
+		if _, ok := cw.watchers[service]; ok {
+			continue
+		}
+		wp, err := watch.Parse(map[string]interface{}{
+			"type":    "service",
+			"service": service,
+		})
+		if err == nil {
+			wp.Handler = cw.serviceHandler
+			go wp.RunWithClientAndHclog(cw.r.Client(), wp.Logger)
+			cw.watchers[service] = wp
+			cw.next <- &registry.Result{Action: "create", Service: &registry.Service{Name: service}}
+		}
+	}
+
+	cw.RLock()
+	// make a copy
+	rservices := make(map[string][]*registry.Service)
+	for k, v := range cw.services {
+		rservices[k] = v
+	}
+	cw.RUnlock()
+
+	// remove unknown services from registry
+	// save the things we want to delete
+	deleted := make(map[string][]*registry.Service)
+
+	for service := range rservices {
+		if _, ok := services[service]; !ok {
+			cw.Lock()
+			// save this before deleting
+			deleted[service] = cw.services[service]
+			delete(cw.services, service)
+			cw.Unlock()
+		}
+	}
+
+	// remove unknown services from watchers
+	for service, w := range cw.watchers {
+		if _, ok := services[service]; !ok {
+			w.Stop()
+			delete(cw.watchers, service)
+			for _, oldService := range deleted[service] {
+				// send a delete for the service nodes that we're removing
+				cw.next <- &registry.Result{Action: "delete", Service: oldService}
+			}
+			// sent the empty list as the last resort to indicate to delete the entire service
+			cw.next <- &registry.Result{Action: "delete", Service: &registry.Service{Name: service}}
+		}
+	}
+}
+
+func (cw *consulWatcher) Next() (*registry.Result, error) {
+	select {
+	case <-cw.exit:
+		return nil, registry.ErrWatcherStopped
+	case r, ok := <-cw.next:
+		if !ok {
+			return nil, registry.ErrWatcherStopped
+		}
+		return r, nil
+	}
+}
+
+func (cw *consulWatcher) Stop() {
+	select {
+	case <-cw.exit:
+		return
+	default:
+		close(cw.exit)
+		if cw.wp == nil {
+			return
+		}
+		cw.wp.Stop()
+
+		// drain results
+		for {
+			select {
+			case <-cw.next:
+			default:
+				return
+			}
+		}
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/etcd/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/etcd/etcd.go

@@ -0,0 +1,423 @@
+// Package etcd provides an etcd service registry
+package etcd
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/json"
+	"errors"
+	"net"
+	"os"
+	"path"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	hash "github.com/mitchellh/hashstructure"
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/util/cmd"
+	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
+	clientv3 "go.etcd.io/etcd/client/v3"
+	"go.uber.org/zap"
+)
+
+var (
+	prefix = "/micro/registry/"
+)
+
+type etcdRegistry struct {
+	client  *clientv3.Client
+	options registry.Options
+
+	sync.RWMutex
+	register map[string]uint64
+	leases   map[string]clientv3.LeaseID
+}
+
+func init() {
+	cmd.DefaultRegistries["etcd"] = NewRegistry
+}
+
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	e := &etcdRegistry{
+		options:  registry.Options{},
+		register: make(map[string]uint64),
+		leases:   make(map[string]clientv3.LeaseID),
+	}
+	username, password := os.Getenv("ETCD_USERNAME"), os.Getenv("ETCD_PASSWORD")
+	if len(username) > 0 && len(password) > 0 {
+		opts = append(opts, Auth(username, password))
+	}
+	address := os.Getenv("MICRO_REGISTRY_ADDRESS")
+	if len(address) > 0 {
+		opts = append(opts, registry.Addrs(address))
+	}
+	configure(e, opts...)
+	return e
+}
+
+func configure(e *etcdRegistry, opts ...registry.Option) error {
+	config := clientv3.Config{
+		Endpoints: []string{"127.0.0.1:2379"},
+	}
+
+	for _, o := range opts {
+		o(&e.options)
+	}
+
+	if e.options.Timeout == 0 {
+		e.options.Timeout = 5 * time.Second
+	}
+
+	if e.options.Logger == nil {
+		e.options.Logger = logger.DefaultLogger
+	}
+
+	config.DialTimeout = e.options.Timeout
+
+	if e.options.Secure || e.options.TLSConfig != nil {
+		tlsConfig := e.options.TLSConfig
+		if tlsConfig == nil {
+			tlsConfig = &tls.Config{
+				InsecureSkipVerify: true,
+			}
+		}
+
+		config.TLS = tlsConfig
+	}
+
+	if e.options.Context != nil {
+		u, ok := e.options.Context.Value(authKey{}).(*authCreds)
+		if ok {
+			config.Username = u.Username
+			config.Password = u.Password
+		}
+		cfg, ok := e.options.Context.Value(logConfigKey{}).(*zap.Config)
+		if ok && cfg != nil {
+			config.LogConfig = cfg
+		}
+	}
+
+	var cAddrs []string
+
+	for _, address := range e.options.Addrs {
+		if len(address) == 0 {
+			continue
+		}
+		addr, port, err := net.SplitHostPort(address)
+		if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
+			port = "2379"
+			addr = address
+			cAddrs = append(cAddrs, net.JoinHostPort(addr, port))
+		} else if err == nil {
+			cAddrs = append(cAddrs, net.JoinHostPort(addr, port))
+		}
+	}
+
+	// if we got addrs then we'll update
+	if len(cAddrs) > 0 {
+		config.Endpoints = cAddrs
+	}
+
+	cli, err := clientv3.New(config)
+	if err != nil {
+		return err
+	}
+	e.client = cli
+	return nil
+}
+
+func encode(s *registry.Service) string {
+	b, _ := json.Marshal(s)
+	return string(b)
+}
+
+func decode(ds []byte) *registry.Service {
+	var s *registry.Service
+	json.Unmarshal(ds, &s)
+	return s
+}
+
+func nodePath(s, id string) string {
+	service := strings.Replace(s, "/", "-", -1)
+	node := strings.Replace(id, "/", "-", -1)
+	return path.Join(prefix, service, node)
+}
+
+func servicePath(s string) string {
+	return path.Join(prefix, strings.Replace(s, "/", "-", -1))
+}
+
+func (e *etcdRegistry) Init(opts ...registry.Option) error {
+	return configure(e, opts...)
+}
+
+func (e *etcdRegistry) Options() registry.Options {
+	return e.options
+}
+
+func (e *etcdRegistry) registerNode(s *registry.Service, node *registry.Node, opts ...registry.RegisterOption) error {
+	if len(s.Nodes) == 0 {
+		return errors.New("Require at least one node")
+	}
+
+	// check existing lease cache
+	e.RLock()
+	leaseID, ok := e.leases[s.Name+node.Id]
+	e.RUnlock()
+
+	log := e.options.Logger
+
+	if !ok {
+		// missing lease, check if the key exists
+		ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
+		defer cancel()
+
+		// look for the existing key
+		rsp, err := e.client.Get(ctx, nodePath(s.Name, node.Id), clientv3.WithSerializable())
+		if err != nil {
+			return err
+		}
+
+		// get the existing lease
+		for _, kv := range rsp.Kvs {
+			if kv.Lease > 0 {
+				leaseID = clientv3.LeaseID(kv.Lease)
+
+				// decode the existing node
+				srv := decode(kv.Value)
+				if srv == nil || len(srv.Nodes) == 0 {
+					continue
+				}
+
+				// create hash of service; uint64
+				h, err := hash.Hash(srv.Nodes[0], nil)
+				if err != nil {
+					continue
+				}
+
+				// save the info
+				e.Lock()
+				e.leases[s.Name+node.Id] = leaseID
+				e.register[s.Name+node.Id] = h
+				e.Unlock()
+
+				break
+			}
+		}
+	}
+
+	var leaseNotFound bool
+
+	// renew the lease if it exists
+	if leaseID > 0 {
+		log.Logf(logger.TraceLevel, "Renewing existing lease for %s %d", s.Name, leaseID)
+		if _, err := e.client.KeepAliveOnce(context.TODO(), leaseID); err != nil {
+			if err != rpctypes.ErrLeaseNotFound {
+				return err
+			}
+
+			log.Logf(logger.TraceLevel, "Lease not found for %s %d", s.Name, leaseID)
+			// lease not found do register
+			leaseNotFound = true
+		}
+	}
+
+	// create hash of service; uint64
+	h, err := hash.Hash(node, nil)
+	if err != nil {
+		return err
+	}
+
+	// get existing hash for the service node
+	e.Lock()
+	v, ok := e.register[s.Name+node.Id]
+	e.Unlock()
+
+	// the service is unchanged, skip registering
+	if ok && v == h && !leaseNotFound {
+		log.Logf(logger.TraceLevel, "Service %s node %s unchanged skipping registration", s.Name, node.Id)
+		return nil
+	}
+
+	service := &registry.Service{
+		Name:      s.Name,
+		Version:   s.Version,
+		Metadata:  s.Metadata,
+		Endpoints: s.Endpoints,
+		Nodes:     []*registry.Node{node},
+	}
+
+	var options registry.RegisterOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
+	defer cancel()
+
+	var lgr *clientv3.LeaseGrantResponse
+	if options.TTL.Seconds() > 0 {
+		// get a lease used to expire keys since we have a ttl
+		lgr, err = e.client.Grant(ctx, int64(options.TTL.Seconds()))
+		if err != nil {
+			return err
+		}
+	}
+
+	log.Logf(logger.TraceLevel, "Registering %s id %s with lease %v and leaseID %v and ttl %v", service.Name, node.Id, lgr, lgr.ID, options.TTL)
+	// create an entry for the node
+	if lgr != nil {
+		_, err = e.client.Put(ctx, nodePath(service.Name, node.Id), encode(service), clientv3.WithLease(lgr.ID))
+	} else {
+		_, err = e.client.Put(ctx, nodePath(service.Name, node.Id), encode(service))
+	}
+	if err != nil {
+		return err
+	}
+
+	e.Lock()
+	// save our hash of the service
+	e.register[s.Name+node.Id] = h
+	// save our leaseID of the service
+	if lgr != nil {
+		e.leases[s.Name+node.Id] = lgr.ID
+	}
+	e.Unlock()
+
+	return nil
+}
+
+func (e *etcdRegistry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
+	if len(s.Nodes) == 0 {
+		return errors.New("Require at least one node")
+	}
+
+	for _, node := range s.Nodes {
+		e.Lock()
+		// delete our hash of the service
+		delete(e.register, s.Name+node.Id)
+		// delete our lease of the service
+		delete(e.leases, s.Name+node.Id)
+		e.Unlock()
+
+		ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
+		defer cancel()
+
+		e.options.Logger.Logf(logger.TraceLevel, "Deregistering %s id %s", s.Name, node.Id)
+		_, err := e.client.Delete(ctx, nodePath(s.Name, node.Id))
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (e *etcdRegistry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
+	if len(s.Nodes) == 0 {
+		return errors.New("Require at least one node")
+	}
+
+	var gerr error
+
+	// register each node individually
+	for _, node := range s.Nodes {
+		err := e.registerNode(s, node, opts...)
+		if err != nil {
+			gerr = err
+		}
+	}
+
+	return gerr
+}
+
+func (e *etcdRegistry) GetService(name string, opts ...registry.GetOption) ([]*registry.Service, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
+	defer cancel()
+
+	rsp, err := e.client.Get(ctx, servicePath(name)+"/", clientv3.WithPrefix(), clientv3.WithSerializable())
+	if err != nil {
+		return nil, err
+	}
+
+	if len(rsp.Kvs) == 0 {
+		return nil, registry.ErrNotFound
+	}
+
+	serviceMap := map[string]*registry.Service{}
+
+	for _, n := range rsp.Kvs {
+		if sn := decode(n.Value); sn != nil {
+			s, ok := serviceMap[sn.Version]
+			if !ok {
+				s = &registry.Service{
+					Name:      sn.Name,
+					Version:   sn.Version,
+					Metadata:  sn.Metadata,
+					Endpoints: sn.Endpoints,
+				}
+				serviceMap[s.Version] = s
+			}
+
+			s.Nodes = append(s.Nodes, sn.Nodes...)
+		}
+	}
+
+	services := make([]*registry.Service, 0, len(serviceMap))
+	for _, service := range serviceMap {
+		services = append(services, service)
+	}
+
+	return services, nil
+}
+
+func (e *etcdRegistry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
+	versions := make(map[string]*registry.Service)
+
+	ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
+	defer cancel()
+
+	rsp, err := e.client.Get(ctx, prefix, clientv3.WithPrefix(), clientv3.WithSerializable())
+	if err != nil {
+		return nil, err
+	}
+
+	if len(rsp.Kvs) == 0 {
+		return []*registry.Service{}, nil
+	}
+
+	for _, n := range rsp.Kvs {
+		sn := decode(n.Value)
+		if sn == nil {
+			continue
+		}
+		v, ok := versions[sn.Name+sn.Version]
+		if !ok {
+			versions[sn.Name+sn.Version] = sn
+			continue
+		}
+		// append to service:version nodes
+		v.Nodes = append(v.Nodes, sn.Nodes...)
+	}
+
+	services := make([]*registry.Service, 0, len(versions))
+	for _, service := range versions {
+		services = append(services, service)
+	}
+
+	// sort the services
+	sort.Slice(services, func(i, j int) bool { return services[i].Name < services[j].Name })
+
+	return services, nil
+}
+
+func (e *etcdRegistry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
+	return newEtcdWatcher(e, e.options.Timeout, opts...)
+}
+
+func (e *etcdRegistry) String() string {
+	return "etcd"
+}

vendor/github.com/go-micro/plugins/v4/registry/etcd/options.go

@@ -0,0 +1,37 @@
+package etcd
+
+import (
+	"context"
+
+	"go-micro.dev/v4/registry"
+	"go.uber.org/zap"
+)
+
+type authKey struct{}
+
+type logConfigKey struct{}
+
+type authCreds struct {
+	Username string
+	Password string
+}
+
+// Auth allows you to specify username/password.
+func Auth(username, password string) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, authKey{}, &authCreds{Username: username, Password: password})
+	}
+}
+
+// LogConfig allows you to set etcd log config.
+func LogConfig(config *zap.Config) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, logConfigKey{}, config)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/etcd/watcher.go

@@ -0,0 +1,91 @@
+package etcd
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"go-micro.dev/v4/registry"
+	clientv3 "go.etcd.io/etcd/client/v3"
+)
+
+type etcdWatcher struct {
+	stop    chan bool
+	w       clientv3.WatchChan
+	client  *clientv3.Client
+	timeout time.Duration
+}
+
+func newEtcdWatcher(r *etcdRegistry, timeout time.Duration, opts ...registry.WatchOption) (registry.Watcher, error) {
+	var wo registry.WatchOptions
+	for _, o := range opts {
+		o(&wo)
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	stop := make(chan bool, 1)
+
+	go func() {
+		<-stop
+		cancel()
+	}()
+
+	watchPath := prefix
+	if len(wo.Service) > 0 {
+		watchPath = servicePath(wo.Service) + "/"
+	}
+
+	return &etcdWatcher{
+		stop:    stop,
+		w:       r.client.Watch(ctx, watchPath, clientv3.WithPrefix(), clientv3.WithPrevKV()),
+		client:  r.client,
+		timeout: timeout,
+	}, nil
+}
+
+func (ew *etcdWatcher) Next() (*registry.Result, error) {
+	for wresp := range ew.w {
+		if wresp.Err() != nil {
+			return nil, wresp.Err()
+		}
+		if wresp.Canceled {
+			return nil, errors.New("could not get next")
+		}
+		for _, ev := range wresp.Events {
+			service := decode(ev.Kv.Value)
+			var action string
+
+			switch ev.Type {
+			case clientv3.EventTypePut:
+				if ev.IsCreate() {
+					action = "create"
+				} else if ev.IsModify() {
+					action = "update"
+				}
+			case clientv3.EventTypeDelete:
+				action = "delete"
+
+				// get service from prevKv
+				service = decode(ev.PrevKv.Value)
+			}
+
+			if service == nil {
+				continue
+			}
+			return &registry.Result{
+				Action:  action,
+				Service: service,
+			}, nil
+		}
+	}
+	return nil, errors.New("could not get next")
+}
+
+func (ew *etcdWatcher) Stop() {
+	select {
+	case <-ew.stop:
+		return
+	default:
+		close(ew.stop)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/README.md

@@ -0,0 +1,66 @@
+# Kubernetes Registry Plugin for micro
+This is a plugin for go-micro that allows you to use Kubernetes as a registry.
+
+
+## Overview
+This registry plugin makes use of Annotations and Labels on a Kubernetes pod
+to build a service discovery mechanism.
+
+
+## RBAC
+If your Kubernetes cluster has RBAC enabled, a role and role binding
+will need to be created to allow this plugin to `list` and `patch` pods.
+
+A cluster role can be used to specify the `list` and `patch`
+requirements, while a role binding per namespace can be used to apply
+the cluster role. The example RBAC configs below assume your Micro-based
+services are running in the `test` namespace, and the pods that contain
+the services are using the `micro-services` service account.
+
+```
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: micro-registry
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - pods
+  verbs:
+  - list
+  - patch
+  - watch
+```
+
+```
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: micro-registry
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: micro-registry
+subjects:
+- kind: ServiceAccount
+  name: micro-services
+  namespace: test
+```
+
+
+## Gotchas
+* Registering/Deregistering relies on the HOSTNAME Environment Variable, which inside a pod
+is the place where it can be retrieved from. (This needs improving)
+
+
+## Connecting to the Kubernetes API
+### Within a pod
+If the `--registry_address` flag is omitted, the plugin will securely connect to
+the Kubernetes API using the pods "Service Account". No extra configuration is necessary.
+
+Find out more about service accounts here. http://kubernetes.io/docs/user-guide/accessing-the-cluster/
+
+### Outside of Kubernetes
+Some functions of the plugin should work, but its not been heavily tested.
+Currently no TLS support.

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/api/request.go

@@ -0,0 +1,220 @@
+// Package api ...
+package api
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client/watch"
+)
+
+// Request is used to construct a http request for the k8s API.
+type Request struct {
+	client    *http.Client
+	header    http.Header
+	params    url.Values
+	method    string
+	host      string
+	namespace string
+
+	resource     string
+	resourceName *string
+	body         io.Reader
+
+	err error
+}
+
+// Params is the object to pass in to set parameters
+// on a request.
+type Params struct {
+	LabelSelector map[string]string
+	Watch         bool
+}
+
+// Options ...
+type Options struct {
+	Host        string
+	Namespace   string
+	BearerToken *string
+	Client      *http.Client
+}
+
+// NewRequest creates a k8s api request.
+func NewRequest(opts *Options) *Request {
+	req := Request{
+		header:    make(http.Header),
+		params:    make(url.Values),
+		client:    opts.Client,
+		namespace: opts.Namespace,
+		host:      opts.Host,
+	}
+
+	if opts.BearerToken != nil {
+		req.SetHeader("Authorization", "Bearer "+*opts.BearerToken)
+	}
+
+	return &req
+}
+
+// verb sets method.
+func (r *Request) verb(method string) *Request {
+	r.method = method
+	return r
+}
+
+// Get request.
+func (r *Request) Get() *Request {
+	return r.verb("GET")
+}
+
+// Post request.
+func (r *Request) Post() *Request {
+	return r.verb("POST")
+}
+
+// Put request.
+func (r *Request) Put() *Request {
+	return r.verb("PUT")
+}
+
+// Patch request
+// https://github.com/kubernetes/kubernetes/blob/master/docs/devel/api-conventions.md#patch-operations
+func (r *Request) Patch() *Request {
+	return r.verb("PATCH").SetHeader("Content-Type", "application/strategic-merge-patch+json")
+}
+
+// Delete request.
+func (r *Request) Delete() *Request {
+	return r.verb("DELETE")
+}
+
+// Namespace is to set the namespace to operate on.
+func (r *Request) Namespace(s string) *Request {
+	r.namespace = s
+	return r
+}
+
+// Resource is the type of resource the operation is
+// for, such as "services", "endpoints" or "pods".
+func (r *Request) Resource(s string) *Request {
+	r.resource = s
+	return r
+}
+
+// Name is for targeting a specific resource by id.
+func (r *Request) Name(s string) *Request {
+	r.resourceName = &s
+	return r
+}
+
+// Body pass in a body to set, this is for POST, PUT
+// and PATCH requests.
+func (r *Request) Body(in interface{}) *Request {
+	b := new(bytes.Buffer)
+	if err := json.NewEncoder(b).Encode(&in); err != nil {
+		r.err = err
+		return r
+	}
+
+	r.body = b
+
+	return r
+}
+
+// Params isused to set parameters on a request.
+func (r *Request) Params(p *Params) *Request {
+	for k, v := range p.LabelSelector {
+		// create new key=value pair
+		value := fmt.Sprintf("%s=%s", k, v)
+		// check if there's an existing value
+		if label := r.params.Get("labelSelector"); len(label) > 0 {
+			value = fmt.Sprintf("%s,%s", label, value)
+		}
+		// set and overwrite the value
+		r.params.Set("labelSelector", value)
+	}
+
+	return r
+}
+
+// SetHeader sets a header on a request with
+// a `key` and `value`.
+func (r *Request) SetHeader(key, value string) *Request {
+	r.header.Add(key, value)
+	return r
+}
+
+// request builds the http.Request from the options.
+func (r *Request) request() (*http.Request, error) {
+	url := fmt.Sprintf("%s/api/v1/namespaces/%s/%s/", r.host, r.namespace, r.resource)
+
+	// append resourceName if it is present
+	if r.resourceName != nil {
+		url += *r.resourceName
+	}
+
+	// append any query params
+	if len(r.params) > 0 {
+		url += "?" + r.params.Encode()
+	}
+
+	// build request
+	req, err := http.NewRequest(r.method, url, r.body)
+	if err != nil {
+		return nil, err
+	}
+
+	// set headers on request
+	req.Header = r.header
+
+	return req, nil
+}
+
+// Do builds and triggers the request.
+func (r *Request) Do() *Response {
+	if r.err != nil {
+		return &Response{
+			err: r.err,
+		}
+	}
+
+	req, err := r.request()
+	if err != nil {
+		return &Response{
+			err: err,
+		}
+	}
+
+	res, err := r.client.Do(req)
+	if err != nil {
+		return &Response{
+			err: err,
+		}
+	}
+
+	// return res, err
+	return newResponse(res, err)
+}
+
+// Watch builds and triggers the request, but will watch instead of return
+// an object.
+func (r *Request) Watch() (watch.Watch, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+
+	r.params.Set("watch", "true")
+
+	req, err := r.request()
+	if err != nil {
+		return nil, err
+	}
+
+	w, err := watch.NewBodyWatcher(req, r.client)
+
+	return w, err
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/api/response.go

@@ -0,0 +1,90 @@
+package api
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/pkg/errors"
+	log "go-micro.dev/v4/logger"
+)
+
+// Errors ...
+var (
+	ErrNoPodName = errors.New("no pod name provided")
+	ErrNotFound  = errors.New("pod not found")
+	ErrDecode    = errors.New("error decoding")
+	ErrOther     = errors.New("unspecified error occurred in k8s registry")
+)
+
+// Response ...
+type Response struct {
+	res *http.Response
+	err error
+}
+
+// Error returns an error.
+func (r *Response) Error() error {
+	return r.err
+}
+
+// StatusCode returns status code for response.
+func (r *Response) StatusCode() int {
+	return r.res.StatusCode
+}
+
+// Decode decodes body into `data`.
+func (r *Response) Decode(data interface{}) error {
+	if r.err != nil {
+		return r.err
+	}
+
+	var err error
+	defer func() {
+		nerr := r.res.Body.Close()
+		if err != nil {
+			err = nerr
+		}
+	}()
+
+	decoder := json.NewDecoder(r.res.Body)
+
+	if err := decoder.Decode(&data); err != nil {
+		return errors.Wrap(ErrDecode, err.Error())
+	}
+
+	return r.err
+}
+
+func newResponse(r *http.Response, err error) *Response {
+	resp := &Response{
+		res: r,
+		err: err,
+	}
+
+	if err != nil {
+		return resp
+	}
+
+	// Check if request is successful.
+	s := resp.res.StatusCode
+	if s == http.StatusOK || s == http.StatusCreated || s == http.StatusNoContent {
+		return resp
+	}
+
+	if resp.res.StatusCode == http.StatusNotFound {
+		resp.err = ErrNotFound
+		return resp
+	}
+
+	log.Errorf("K8s: request failed with code %v", resp.res.StatusCode)
+
+	b, err := io.ReadAll(resp.res.Body)
+	if err == nil {
+		log.Errorf("K8s: request failed with body: %s", string(b))
+	}
+
+	resp.err = ErrOther
+
+	return resp
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/client.go

@@ -0,0 +1,142 @@
+// Package client is the kubernetes registry client.
+package client
+
+import (
+	"crypto/tls"
+	"errors"
+	"net/http"
+	"os"
+	"path"
+
+	"go-micro.dev/v4/logger"
+
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client/api"
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client/watch"
+)
+
+var (
+	serviceAccountPath = "/var/run/secrets/kubernetes.io/serviceaccount"
+
+	// ErrReadNamespace error when failed to read namespace.
+	ErrReadNamespace = errors.New("could not read namespace from service account secret")
+)
+
+// Client ...
+type client struct {
+	opts *api.Options
+}
+
+// NewClientByHost sets up a client by host.
+func NewClientByHost(host string) Kubernetes {
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{
+			//nolint:gosec
+			InsecureSkipVerify: true,
+		},
+		DisableCompression: true,
+	}
+
+	c := &http.Client{
+		Transport: tr,
+	}
+
+	return &client{
+		opts: &api.Options{
+			Client:    c,
+			Host:      host,
+			Namespace: "default",
+		},
+	}
+}
+
+// NewClientInCluster should work similarly to the official api
+// NewInClient by setting up a client configuration for use within
+// a k8s pod.
+func NewClientInCluster() Kubernetes {
+	host := "https://" + os.Getenv("KUBERNETES_SERVICE_HOST") + ":" + os.Getenv("KUBERNETES_SERVICE_PORT")
+
+	s, err := os.Stat(serviceAccountPath)
+	if err != nil {
+		logger.Fatal(err)
+	}
+
+	if s == nil || !s.IsDir() {
+		logger.Fatal(errors.New("no k8s service account found"))
+	}
+
+	t, err := os.ReadFile(path.Join(serviceAccountPath, "token"))
+	if err != nil {
+		logger.Fatal(err)
+	}
+
+	token := string(t)
+
+	ns, err := detectNamespace()
+	if err != nil {
+		logger.Fatal(err)
+	}
+
+	crt, err := CertPoolFromFile(path.Join(serviceAccountPath, "ca.crt"))
+	if err != nil {
+		logger.Fatal(err)
+	}
+
+	c := &http.Client{
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				RootCAs:    crt,
+				MinVersion: tls.VersionTLS12,
+			},
+			DisableCompression: true,
+		},
+	}
+
+	return &client{
+		opts: &api.Options{
+			Client:      c,
+			Host:        host,
+			Namespace:   ns,
+			BearerToken: &token,
+		},
+	}
+}
+
+// ListPods ...
+func (c *client) ListPods(labels map[string]string) (*PodList, error) {
+	var pods PodList
+	err := api.NewRequest(c.opts).Get().Resource("pods").Params(&api.Params{LabelSelector: labels}).Do().Decode(&pods)
+
+	return &pods, err
+}
+
+// UpdatePod ...
+func (c *client) UpdatePod(name string, p *Pod) (*Pod, error) {
+	var pod Pod
+	err := api.NewRequest(c.opts).Patch().Resource("pods").Name(name).Body(p).Do().Decode(&pod)
+
+	return &pod, err
+}
+
+// WatchPods ...
+func (c *client) WatchPods(labels map[string]string) (watch.Watch, error) {
+	return api.NewRequest(c.opts).Get().Resource("pods").Params(&api.Params{LabelSelector: labels}).Watch()
+}
+
+func detectNamespace() (string, error) {
+	nsPath := path.Join(serviceAccountPath, "namespace")
+
+	// Make sure it's a file and we can read it
+	if s, err := os.Stat(nsPath); err != nil {
+		return "", err
+	} else if s.IsDir() {
+		return "", ErrReadNamespace
+	}
+
+	// Read the file, and cast to a string
+	ns, err := os.ReadFile(path.Clean(nsPath))
+	if err != nil {
+		return string(ns), err
+	}
+
+	return string(ns), nil
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/kubernetes.go

@@ -0,0 +1,35 @@
+package client
+
+import "github.com/go-micro/plugins/v4/registry/kubernetes/client/watch"
+
+// Kubernetes ...
+type Kubernetes interface {
+	ListPods(labels map[string]string) (*PodList, error)
+	UpdatePod(podName string, pod *Pod) (*Pod, error)
+	WatchPods(labels map[string]string) (watch.Watch, error)
+}
+
+// PodList ...
+type PodList struct {
+	Items []Pod `json:"items"`
+}
+
+// Pod is the top level item for a pod.
+type Pod struct {
+	Metadata *Meta   `json:"metadata"`
+	Status   *Status `json:"status"`
+}
+
+// Meta ...
+type Meta struct {
+	Name              string             `json:"name,omitempty"`
+	Labels            map[string]*string `json:"labels,omitempty"`
+	Annotations       map[string]*string `json:"annotations,omitempty"`
+	DeletionTimestamp string             `json:"deletionTimestamp,omitempty"`
+}
+
+// Status ...
+type Status struct {
+	PodIP string `json:"podIP"`
+	Phase string `json:"phase"`
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/utils.go

@@ -0,0 +1,87 @@
+package client
+
+import (
+	"crypto/x509"
+	"encoding/pem"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+// COPIED FROM
+// https://github.com/kubernetes/kubernetes/blob/7a725418af4661067b56506faabc2d44c6d7703a/pkg/util/crypto/crypto.go
+
+// CertPoolFromFile returns an x509.CertPool containing the certificates in
+// the given PEM-encoded file. Returns an error if the file could not be read,
+// a certificate could not be parsed, or if the file does not contain any certificates.
+func CertPoolFromFile(filename string) (*x509.CertPool, error) {
+	certs, err := certificatesFromFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	pool := x509.NewCertPool()
+	for _, cert := range certs {
+		pool.AddCert(cert)
+	}
+
+	return pool, nil
+}
+
+// certificatesFromFile returns the x509.Certificates contained in the given
+// PEM-encoded file. Returns an error if the file could not be read, a
+// certificate could not be parsed, or if the file does not contain any certificates.
+func certificatesFromFile(file string) ([]*x509.Certificate, error) {
+	if len(file) == 0 {
+		return nil, errors.New("error reading certificates from an empty filename")
+	}
+
+	pemBlock, err := os.ReadFile(filepath.Clean(file))
+	if err != nil {
+		return nil, err
+	}
+
+	certs, err := CertsFromPEM(pemBlock)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error reading %s", file)
+	}
+
+	return certs, nil
+}
+
+// CertsFromPEM returns the x509.Certificates contained in the given PEM-encoded
+// byte array. Returns an error if a certificate could not be parsed, or if the
+// data does not contain any certificates.
+func CertsFromPEM(pemCerts []byte) ([]*x509.Certificate, error) {
+	ok := false
+	certs := []*x509.Certificate{}
+
+	for len(pemCerts) > 0 {
+		var block *pem.Block
+		block, pemCerts = pem.Decode(pemCerts)
+
+		if block == nil {
+			break
+		}
+
+		// Only use PEM "CERTIFICATE" blocks without extra headers
+		if block.Type != "CERTIFICATE" || len(block.Headers) != 0 {
+			continue
+		}
+
+		cert, err := x509.ParseCertificate(block.Bytes)
+		if err != nil {
+			return certs, err
+		}
+
+		certs = append(certs, cert)
+		ok = true
+	}
+
+	if !ok {
+		return certs, errors.New("could not read any certificates")
+	}
+
+	return certs, nil
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/watch/body.go

@@ -0,0 +1,104 @@
+package watch
+
+import (
+	"bufio"
+	"context"
+	"encoding/json"
+	"net/http"
+	"sync/atomic"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+// bodyWatcher scans the body of a request for chunks.
+type bodyWatcher struct {
+	ctx     context.Context
+	stop    context.CancelFunc
+	results chan Event
+	res     *http.Response
+	req     *http.Request
+}
+
+// Changes returns the results channel.
+func (wr *bodyWatcher) ResultChan() <-chan Event {
+	return wr.results
+}
+
+// Stop cancels the request.
+func (wr *bodyWatcher) Stop() {
+	select {
+	case <-wr.ctx.Done():
+		return
+	default:
+		wr.stop()
+		close(wr.results)
+	}
+}
+
+func (wr *bodyWatcher) stream() {
+	reader := bufio.NewReader(wr.res.Body)
+
+	// ignore first few messages from stream,
+	// as they are usually old.
+	var ignore atomic.Bool
+
+	go func() {
+		<-time.After(time.Second)
+		ignore.Store(false)
+	}()
+
+	go func() {
+		//nolint:errcheck
+		defer wr.res.Body.Close()
+
+		for {
+			// Read a line
+			b, err := reader.ReadBytes('\n')
+			if err != nil {
+				break
+			}
+
+			// Ignore for the first second
+			if ignore.Load() {
+				continue
+			}
+
+			// Send the event
+			var event Event
+			if err := json.Unmarshal(b, &event); err != nil {
+				continue
+			}
+			wr.results <- event
+		}
+
+		// stop the watcher
+		wr.Stop()
+	}()
+}
+
+// NewBodyWatcher creates a k8s body watcher for a given http request.
+func NewBodyWatcher(req *http.Request, client *http.Client) (Watch, error) {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	req = req.WithContext(ctx)
+
+	//nolint:bodyclose
+	res, err := client.Do(req)
+	if err != nil {
+		cancel()
+		return nil, errors.Wrap(err, "body watcher failed to make http request")
+	}
+
+	wr := &bodyWatcher{
+		ctx:     ctx,
+		results: make(chan Event),
+		stop:    cancel,
+		req:     req,
+		res:     res,
+	}
+
+	go wr.stream()
+
+	return wr, nil
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/client/watch/watch.go

@@ -0,0 +1,27 @@
+// Package watch implements the k8s watcher.
+package watch
+
+import "encoding/json"
+
+// Watch ...
+type Watch interface {
+	Stop()
+	ResultChan() <-chan Event
+}
+
+// EventType defines the possible types of events.
+type EventType string
+
+// EventTypes used.
+const (
+	Added    EventType = "ADDED"
+	Modified EventType = "MODIFIED"
+	Deleted  EventType = "DELETED"
+	Error    EventType = "ERROR"
+)
+
+// Event represents a single event to a watched resource.
+type Event struct {
+	Type   EventType       `json:"type"`
+	Object json.RawMessage `json:"object"`
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/kubernetes.go

@@ -0,0 +1,321 @@
+// Package kubernetes provides a kubernetes registry
+package kubernetes
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/util/cmd"
+
+	"github.com/pkg/errors"
+
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client"
+)
+
+type kregistry struct {
+	client  client.Kubernetes
+	timeout time.Duration
+	options registry.Options
+}
+
+var (
+	// used on pods as labels & services to select
+	// eg: svcSelectorPrefix+"svc.name"
+	svcSelectorPrefix = "micro.mu/selector-"
+	svcSelectorValue  = "service"
+
+	labelTypeKey          = "micro.mu/type"
+	labelTypeValueService = "service"
+
+	// used on k8s services to scope a serialized
+	// micro service by pod name.
+	annotationServiceKeyPrefix = "micro.mu/service-"
+
+	// Pod status.
+	podRunning = "Running"
+
+	// label name regex.
+	labelRe = regexp.MustCompilePOSIX("[-A-Za-z0-9_.]")
+)
+
+// Err are all package errors.
+var (
+	ErrNoHostname   = errors.New("failed to get podname from HOSTNAME variable")
+	ErrNoNodesFound = errors.New("you must provide at least one node")
+)
+
+// podSelector.
+var podSelector = map[string]string{
+	labelTypeKey: labelTypeValueService,
+}
+
+func init() {
+	cmd.DefaultRegistries["kubernetes"] = NewRegistry
+}
+
+func configure(k *kregistry, opts ...registry.Option) error {
+	for _, o := range opts {
+		o(&k.options)
+	}
+
+	// get first host
+	var host string
+	if len(k.options.Addrs) > 0 && len(k.options.Addrs[0]) > 0 {
+		host = k.options.Addrs[0]
+	}
+
+	if k.options.Timeout == 0 {
+		k.options.Timeout = time.Second * 1
+	}
+
+	// if no hosts setup, assume InCluster
+	var c client.Kubernetes
+	if len(host) == 0 {
+		c = client.NewClientInCluster()
+	} else {
+		c = client.NewClientByHost(host)
+	}
+
+	k.client = c
+	k.timeout = k.options.Timeout
+
+	return nil
+}
+
+// serviceName generates a valid service name for k8s labels.
+func serviceName(name string) string {
+	aname := make([]byte, len(name))
+
+	for i, r := range []byte(name) {
+		if !labelRe.Match([]byte{r}) {
+			aname[i] = '_'
+			continue
+		}
+
+		aname[i] = r
+	}
+
+	return string(aname)
+}
+
+// Init allows reconfig of options.
+func (c *kregistry) Init(opts ...registry.Option) error {
+	return configure(c, opts...)
+}
+
+// Options returns the registry Options.
+func (c *kregistry) Options() registry.Options {
+	return c.options
+}
+
+// Register sets a service selector label and an annotation with a
+// serialized version of the service passed in.
+func (c *kregistry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
+	if len(s.Nodes) == 0 {
+		return ErrNoNodesFound
+	}
+
+	svcName := s.Name
+
+	// TODO: grab podname from somewhere better than this.
+	podName, err := getPodName()
+	if err != nil {
+		return errors.Wrap(err, "failed to register")
+	}
+
+	// encode micro service
+	b, err := json.Marshal(s)
+	if err != nil {
+		return err
+	}
+
+	svc := string(b)
+
+	pod := &client.Pod{
+		Metadata: &client.Meta{
+			Labels: map[string]*string{
+				labelTypeKey:                             &labelTypeValueService,
+				svcSelectorPrefix + serviceName(svcName): &svcSelectorValue,
+			},
+			Annotations: map[string]*string{
+				annotationServiceKeyPrefix + serviceName(svcName): &svc,
+			},
+		},
+	}
+
+	if _, err := c.client.UpdatePod(podName, pod); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Deregister nils out any things set in Register.
+func (c *kregistry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
+	if len(s.Nodes) == 0 {
+		return ErrNoNodesFound
+	}
+
+	svcName := s.Name
+
+	// TODO: grab podname from somewhere better than env var.
+	podName, err := getPodName()
+	if err != nil {
+		return errors.Wrap(err, "failed to deregister")
+	}
+
+	pod := &client.Pod{
+		Metadata: &client.Meta{
+			Labels: map[string]*string{
+				svcSelectorPrefix + serviceName(svcName): nil,
+			},
+			Annotations: map[string]*string{
+				annotationServiceKeyPrefix + serviceName(svcName): nil,
+			},
+		},
+	}
+
+	if _, err := c.client.UpdatePod(podName, pod); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// GetService will get all the pods with the given service selector,
+// and build services from the annotations.
+func (c *kregistry) GetService(name string, opts ...registry.GetOption) ([]*registry.Service, error) {
+	pods, err := c.client.ListPods(map[string]string{
+		svcSelectorPrefix + serviceName(name): svcSelectorValue,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if len(pods.Items) == 0 {
+		return nil, registry.ErrNotFound
+	}
+
+	// svcs mapped by version
+	svcs := make(map[string]*registry.Service)
+
+	// loop through items
+	for _, pod := range pods.Items {
+		if pod.Status.Phase != podRunning || pod.Metadata.DeletionTimestamp != "" {
+			continue
+		}
+		// get serialized service from annotation
+		svcStr, ok := pod.Metadata.Annotations[annotationServiceKeyPrefix+serviceName(name)]
+		if !ok {
+			continue
+		}
+
+		var svc registry.Service
+
+		// unmarshal service string
+		err := json.Unmarshal([]byte(*svcStr), &svc)
+		if err != nil {
+			return nil, fmt.Errorf("could not unmarshal service '%s' from pod annotation", name)
+		}
+
+		// merge up pod service & ip with versioned service.
+		vs, ok := svcs[svc.Version]
+		if !ok {
+			svcs[svc.Version] = &svc
+			continue
+		}
+
+		vs.Nodes = append(vs.Nodes, svc.Nodes...)
+	}
+
+	list := make([]*registry.Service, 0, len(svcs))
+	for _, val := range svcs {
+		list = append(list, val)
+	}
+
+	return list, nil
+}
+
+// ListServices will list all the service names.
+func (c *kregistry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
+	pods, err := c.client.ListPods(podSelector)
+	if err != nil {
+		return nil, err
+	}
+
+	// svcs mapped by name+version
+	svcs := make(map[string]*registry.Service)
+
+	for _, pod := range pods.Items {
+		if pod.Status.Phase != podRunning || pod.Metadata.DeletionTimestamp != "" {
+			continue
+		}
+
+		for k, v := range pod.Metadata.Annotations {
+			if !strings.HasPrefix(k, annotationServiceKeyPrefix) {
+				continue
+			}
+
+			// we have to unmarshal the annotation itself since the
+			// key is encoded to match the regex restriction.
+			var svc registry.Service
+			if err := json.Unmarshal([]byte(*v), &svc); err != nil {
+				continue
+			}
+
+			s, ok := svcs[svc.Name+svc.Version]
+			if !ok {
+				svcs[svc.Name+svc.Version] = &svc
+				continue
+			}
+
+			// append to service:version nodes
+			s.Nodes = append(s.Nodes, svc.Nodes...)
+		}
+	}
+
+	i := 0
+	list := make([]*registry.Service, len(svcs))
+
+	for _, s := range svcs {
+		list[i] = s
+		i++
+	}
+
+	return list, nil
+}
+
+// Watch returns a kubernetes watcher.
+func (c *kregistry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
+	return newWatcher(c, opts...)
+}
+
+func (c *kregistry) String() string {
+	return "kubernetes"
+}
+
+// NewRegistry creates a kubernetes registry.
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	k := &kregistry{
+		options: registry.Options{},
+	}
+
+	//nolint:errcheck,gosec
+	configure(k, opts...)
+
+	return k
+}
+
+func getPodName() (string, error) {
+	podName := os.Getenv("HOSTNAME")
+	if len(podName) == 0 {
+		return "", ErrNoHostname
+	}
+
+	return podName, nil
+}

vendor/github.com/go-micro/plugins/v4/registry/kubernetes/watcher.go

@@ -0,0 +1,264 @@
+package kubernetes
+
+import (
+	"encoding/json"
+	"errors"
+	"strings"
+	"sync"
+
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client"
+	"github.com/go-micro/plugins/v4/registry/kubernetes/client/watch"
+)
+
+var (
+	deleteAction = "delete"
+)
+
+type k8sWatcher struct {
+	registry *kregistry
+	watcher  watch.Watch
+	next     chan *registry.Result
+
+	sync.RWMutex
+	pods map[string]*client.Pod
+}
+
+// build a cache of pods when the watcher starts.
+func (k *k8sWatcher) updateCache() ([]*registry.Result, error) {
+	podList, err := k.registry.client.ListPods(podSelector)
+	if err != nil {
+		return nil, err
+	}
+
+	var results []*registry.Result
+
+	for _, p := range podList.Items {
+		// Copy to new var as p gets overwritten by the loop
+		pod := p
+		rslts := k.buildPodResults(&pod, nil)
+		results = append(results, rslts...)
+
+		k.Lock()
+		k.pods[pod.Metadata.Name] = &pod
+		k.Unlock()
+	}
+
+	return results, nil
+}
+
+// look through pod annotations, compare against cache if present
+// and return a list of results to send down the wire.
+func (k *k8sWatcher) buildPodResults(pod *client.Pod, cache *client.Pod) []*registry.Result {
+	var results []*registry.Result
+
+	ignore := make(map[string]bool)
+
+	if pod.Metadata != nil {
+		results, ignore = podBuildResult(pod, cache)
+	}
+
+	// loop through cache annotations to find services
+	// not accounted for above, and "delete" them.
+	if cache != nil && cache.Metadata != nil {
+		for annKey, annVal := range cache.Metadata.Annotations {
+			if ignore[annKey] {
+				continue
+			}
+
+			// check this annotation kv is a service notation
+			if !strings.HasPrefix(annKey, annotationServiceKeyPrefix) {
+				continue
+			}
+
+			rslt := &registry.Result{Action: deleteAction}
+
+			// unmarshal service notation from annotation value
+			if err := json.Unmarshal([]byte(*annVal), &rslt.Service); err != nil {
+				continue
+			}
+
+			results = append(results, rslt)
+		}
+	}
+
+	return results
+}
+
+// handleEvent will taken an event from the k8s pods API and do the correct
+// things with the result, based on the local cache.
+func (k *k8sWatcher) handleEvent(event watch.Event) {
+	var pod client.Pod
+	if err := json.Unmarshal([]byte(event.Object), &pod); err != nil {
+		logger.Error("K8s Watcher: Couldnt unmarshal event object from pod")
+		return
+	}
+
+	//nolint:exhaustive
+	switch event.Type {
+	// Pod was modified
+	case watch.Modified:
+		k.RLock()
+		cache := k.pods[pod.Metadata.Name]
+		k.RUnlock()
+
+		// service could have been added, edited or removed.
+		var results []*registry.Result
+
+		if pod.Status.Phase == podRunning {
+			results = k.buildPodResults(&pod, cache)
+		} else {
+			// passing in cache might not return all results
+			results = k.buildPodResults(&pod, nil)
+		}
+
+		for _, result := range results {
+			// pod isnt running
+			if pod.Status.Phase != podRunning || pod.Metadata.DeletionTimestamp != "" {
+				result.Action = deleteAction
+			}
+			k.next <- result
+		}
+
+		k.Lock()
+		k.pods[pod.Metadata.Name] = &pod
+		k.Unlock()
+
+		return
+
+	// Pod was deleted
+	// passing in cache might not return all results
+	case watch.Deleted:
+		results := k.buildPodResults(&pod, nil)
+
+		for _, result := range results {
+			result.Action = deleteAction
+			k.next <- result
+		}
+
+		k.Lock()
+		delete(k.pods, pod.Metadata.Name)
+		k.Unlock()
+
+		return
+	}
+}
+
+// Next will block until a new result comes in.
+func (k *k8sWatcher) Next() (*registry.Result, error) {
+	r, ok := <-k.next
+	if !ok {
+		return nil, errors.New("result chan closed")
+	}
+
+	return r, nil
+}
+
+// Stop will cancel any requests, and close channels.
+func (k *k8sWatcher) Stop() {
+	k.watcher.Stop()
+
+	select {
+	case <-k.next:
+		return
+	default:
+		close(k.next)
+	}
+}
+
+func newWatcher(kr *kregistry, opts ...registry.WatchOption) (registry.Watcher, error) {
+	var wo registry.WatchOptions
+	for _, o := range opts {
+		o(&wo)
+	}
+
+	selector := podSelector
+	if len(wo.Service) > 0 {
+		selector = map[string]string{
+			svcSelectorPrefix + serviceName(wo.Service): svcSelectorValue,
+		}
+	}
+
+	// Create watch request
+	watcher, err := kr.client.WatchPods(selector)
+	if err != nil {
+		return nil, err
+	}
+
+	k := &k8sWatcher{
+		registry: kr,
+		watcher:  watcher,
+		next:     make(chan *registry.Result),
+		pods:     make(map[string]*client.Pod),
+	}
+
+	// update cache, but dont emit changes
+	if _, err := k.updateCache(); err != nil {
+		return nil, err
+	}
+
+	// range over watch request changes, and invoke
+	// the update event
+	go func() {
+		for event := range watcher.ResultChan() {
+			k.handleEvent(event)
+		}
+
+		k.Stop()
+	}()
+
+	return k, nil
+}
+
+func podBuildResult(pod *client.Pod, cache *client.Pod) ([]*registry.Result, map[string]bool) {
+	results := make([]*registry.Result, 0, len(pod.Metadata.Annotations))
+	ignore := make(map[string]bool)
+
+	for annKey, annVal := range pod.Metadata.Annotations {
+		// check this annotation kv is a service notation
+		if !strings.HasPrefix(annKey, annotationServiceKeyPrefix) {
+			continue
+		}
+
+		if annVal == nil {
+			continue
+		}
+
+		// ignore when we check the cached annotations
+		// as we take care of it here
+		ignore[annKey] = true
+
+		// compare against cache.
+		var (
+			cacheExists bool
+			cav         *string
+		)
+
+		if cache != nil && cache.Metadata != nil {
+			cav, cacheExists = cache.Metadata.Annotations[annKey]
+			if cacheExists && cav != nil && cav == annVal {
+				// service notation exists and is identical -
+				// no change result required.
+				continue
+			}
+		}
+
+		rslt := &registry.Result{}
+		if cacheExists {
+			rslt.Action = "update"
+		} else {
+			rslt.Action = "create"
+		}
+
+		// unmarshal service notation from annotation value
+		if err := json.Unmarshal([]byte(*annVal), &rslt.Service); err != nil {
+			continue
+		}
+
+		results = append(results, rslt)
+	}
+
+	return results, ignore
+}

vendor/github.com/go-micro/plugins/v4/registry/mdns/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/mdns/mdns.go

@@ -0,0 +1,16 @@
+// Package mdns provides a multicast dns registry
+package mdns
+
+import (
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/util/cmd"
+)
+
+func init() {
+	cmd.DefaultRegistries["mdns"] = NewRegistry
+}
+
+// NewRegistry returns a new mdns registry.
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	return registry.NewRegistry(opts...)
+}

vendor/github.com/go-micro/plugins/v4/registry/memory/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/memory/memory.go

@@ -0,0 +1,288 @@
+// Package memory provides an in-memory registry
+package memory
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+)
+
+var (
+	sendEventTime = 10 * time.Millisecond
+	ttlPruneTime  = time.Second
+)
+
+type node struct {
+	*registry.Node
+	TTL      time.Duration
+	LastSeen time.Time
+}
+
+type record struct {
+	Name      string
+	Version   string
+	Metadata  map[string]string
+	Nodes     map[string]*node
+	Endpoints []*registry.Endpoint
+}
+
+type Registry struct {
+	options registry.Options
+
+	sync.RWMutex
+	records  map[string]map[string]*record
+	watchers map[string]*Watcher
+}
+
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	options := registry.Options{
+		Context: context.Background(),
+		Logger:  logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	records := getServiceRecords(options.Context)
+	if records == nil {
+		records = make(map[string]map[string]*record)
+	}
+
+	reg := &Registry{
+		options:  options,
+		records:  records,
+		watchers: make(map[string]*Watcher),
+	}
+
+	go reg.ttlPrune()
+
+	return reg
+}
+
+func (m *Registry) ttlPrune() {
+	prune := time.NewTicker(ttlPruneTime)
+	defer prune.Stop()
+
+	for {
+		select {
+		case <-prune.C:
+			m.Lock()
+			for name, records := range m.records {
+				for version, record := range records {
+					for id, n := range record.Nodes {
+						if n.TTL != 0 && time.Since(n.LastSeen) > n.TTL {
+							m.options.Logger.Logf(logger.DebugLevel, "Registry TTL expired for node %s of service %s", n.Id, name)
+							delete(m.records[name][version].Nodes, id)
+						}
+					}
+				}
+			}
+			m.Unlock()
+		}
+	}
+}
+
+func (m *Registry) sendEvent(r *registry.Result) {
+	m.RLock()
+	watchers := make([]*Watcher, 0, len(m.watchers))
+	for _, w := range m.watchers {
+		watchers = append(watchers, w)
+	}
+	m.RUnlock()
+
+	for _, w := range watchers {
+		select {
+		case <-w.exit:
+			m.Lock()
+			delete(m.watchers, w.id)
+			m.Unlock()
+		default:
+			select {
+			case w.res <- r:
+			case <-time.After(sendEventTime):
+			}
+		}
+	}
+}
+
+func (m *Registry) Init(opts ...registry.Option) error {
+	for _, o := range opts {
+		o(&m.options)
+	}
+
+	// add services
+	m.Lock()
+	defer m.Unlock()
+
+	records := getServiceRecords(m.options.Context)
+	for name, record := range records {
+		// add a whole new service including all of its versions
+		if _, ok := m.records[name]; !ok {
+			m.records[name] = record
+			continue
+		}
+		// add the versions of the service we dont track yet
+		for version, r := range record {
+			if _, ok := m.records[name][version]; !ok {
+				m.records[name][version] = r
+				continue
+			}
+		}
+	}
+
+	return nil
+}
+
+func (m *Registry) Options() registry.Options {
+	return m.options
+}
+
+func (m *Registry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
+	m.Lock()
+	defer m.Unlock()
+	log := m.options.Logger
+
+	var options registry.RegisterOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	r := serviceToRecord(s, options.TTL)
+
+	if _, ok := m.records[s.Name]; !ok {
+		m.records[s.Name] = make(map[string]*record)
+	}
+
+	if _, ok := m.records[s.Name][s.Version]; !ok {
+		m.records[s.Name][s.Version] = r
+		log.Logf(logger.DebugLevel, "Registry added new service: %s, version: %s", s.Name, s.Version)
+		go m.sendEvent(&registry.Result{Action: "update", Service: s})
+		return nil
+	}
+
+	addedNodes := false
+	for _, n := range s.Nodes {
+		if _, ok := m.records[s.Name][s.Version].Nodes[n.Id]; !ok {
+			addedNodes = true
+			metadata := make(map[string]string)
+			for k, v := range n.Metadata {
+				metadata[k] = v
+				m.records[s.Name][s.Version].Nodes[n.Id] = &node{
+					Node: &registry.Node{
+						Id:       n.Id,
+						Address:  n.Address,
+						Metadata: metadata,
+					},
+					TTL:      options.TTL,
+					LastSeen: time.Now(),
+				}
+			}
+		}
+	}
+
+	if addedNodes {
+		log.Logf(logger.DebugLevel, "Registry added new node to service: %s, version: %s", s.Name, s.Version)
+		go m.sendEvent(&registry.Result{Action: "update", Service: s})
+		return nil
+	}
+
+	// refresh TTL and timestamp
+	for _, n := range s.Nodes {
+		log.Logf(logger.DebugLevel, "Updated registration for service: %s, version: %s", s.Name, s.Version)
+		m.records[s.Name][s.Version].Nodes[n.Id].TTL = options.TTL
+		m.records[s.Name][s.Version].Nodes[n.Id].LastSeen = time.Now()
+	}
+
+	return nil
+}
+
+func (m *Registry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
+	m.Lock()
+	defer m.Unlock()
+
+	log := m.options.Logger
+
+	if _, ok := m.records[s.Name]; ok {
+		if _, ok := m.records[s.Name][s.Version]; ok {
+			for _, n := range s.Nodes {
+				if _, ok := m.records[s.Name][s.Version].Nodes[n.Id]; ok {
+					log.Logf(logger.DebugLevel, "Registry removed node from service: %s, version: %s", s.Name, s.Version)
+					delete(m.records[s.Name][s.Version].Nodes, n.Id)
+				}
+			}
+			if len(m.records[s.Name][s.Version].Nodes) == 0 {
+				delete(m.records[s.Name], s.Version)
+				log.Logf(logger.DebugLevel, "Registry removed service: %s, version: %s", s.Name, s.Version)
+			}
+		}
+		if len(m.records[s.Name]) == 0 {
+			delete(m.records, s.Name)
+			log.Logf(logger.DebugLevel, "Registry removed service: %s", s.Name)
+		}
+		go m.sendEvent(&registry.Result{Action: "delete", Service: s})
+	}
+
+	return nil
+}
+
+func (m *Registry) GetService(name string, opts ...registry.GetOption) ([]*registry.Service, error) {
+	m.RLock()
+	defer m.RUnlock()
+
+	records, ok := m.records[name]
+	if !ok {
+		return nil, registry.ErrNotFound
+	}
+
+	services := make([]*registry.Service, len(m.records[name]))
+	i := 0
+	for _, record := range records {
+		services[i] = recordToService(record)
+		i++
+	}
+
+	return services, nil
+}
+
+func (m *Registry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
+	m.RLock()
+	defer m.RUnlock()
+
+	var services []*registry.Service
+	for _, records := range m.records {
+		for _, record := range records {
+			services = append(services, recordToService(record))
+		}
+	}
+
+	return services, nil
+}
+
+func (m *Registry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
+	var wo registry.WatchOptions
+	for _, o := range opts {
+		o(&wo)
+	}
+
+	w := &Watcher{
+		exit: make(chan bool),
+		res:  make(chan *registry.Result),
+		id:   uuid.New().String(),
+		wo:   wo,
+	}
+
+	m.Lock()
+	m.watchers[w.id] = w
+	m.Unlock()
+
+	return w, nil
+}
+
+func (m *Registry) String() string {
+	return "memory"
+}

vendor/github.com/go-micro/plugins/v4/registry/memory/memory_watcher.go

@@ -0,0 +1,27 @@
+package memory
+
+import (
+	"errors"
+
+	"go-micro.dev/v4/registry"
+)
+
+type memoryWatcher struct {
+	exit chan bool
+	opts registry.WatchOptions
+}
+
+func (m *memoryWatcher) Next() (*registry.Result, error) {
+	// not implement so we just block until exit
+	<-m.exit
+	return nil, errors.New("watcher stopped")
+}
+
+func (m *memoryWatcher) Stop() {
+	select {
+	case <-m.exit:
+		return
+	default:
+		close(m.exit)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/memory/options.go

@@ -0,0 +1,40 @@
+package memory
+
+import (
+	"context"
+
+	"go-micro.dev/v4/registry"
+)
+
+type servicesKey struct{}
+
+func getServiceRecords(ctx context.Context) map[string]map[string]*record {
+	memServices, ok := ctx.Value(servicesKey{}).(map[string][]*registry.Service)
+	if !ok {
+		return nil
+	}
+
+	services := make(map[string]map[string]*record)
+
+	for name, svc := range memServices {
+		if _, ok := services[name]; !ok {
+			services[name] = make(map[string]*record)
+		}
+		// go through every version of the service
+		for _, s := range svc {
+			services[s.Name][s.Version] = serviceToRecord(s, 0)
+		}
+	}
+
+	return services
+}
+
+// Services is an option that preloads service data.
+func Services(s map[string][]*registry.Service) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, servicesKey{}, s)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/memory/util.go

@@ -0,0 +1,91 @@
+package memory
+
+import (
+	"time"
+
+	"go-micro.dev/v4/registry"
+)
+
+func serviceToRecord(s *registry.Service, ttl time.Duration) *record {
+	metadata := make(map[string]string, len(s.Metadata))
+	for k, v := range s.Metadata {
+		metadata[k] = v
+	}
+
+	nodes := make(map[string]*node, len(s.Nodes))
+	for _, n := range s.Nodes {
+		nodes[n.Id] = &node{
+			Node:     n,
+			TTL:      ttl,
+			LastSeen: time.Now(),
+		}
+	}
+
+	endpoints := make([]*registry.Endpoint, len(s.Endpoints))
+	for i, e := range s.Endpoints {
+		endpoints[i] = e
+	}
+
+	return &record{
+		Name:      s.Name,
+		Version:   s.Version,
+		Metadata:  metadata,
+		Nodes:     nodes,
+		Endpoints: endpoints,
+	}
+}
+
+func recordToService(r *record) *registry.Service {
+	metadata := make(map[string]string, len(r.Metadata))
+	for k, v := range r.Metadata {
+		metadata[k] = v
+	}
+
+	endpoints := make([]*registry.Endpoint, len(r.Endpoints))
+	for i, e := range r.Endpoints {
+		request := new(registry.Value)
+		if e.Request != nil {
+			*request = *e.Request
+		}
+		response := new(registry.Value)
+		if e.Response != nil {
+			*response = *e.Response
+		}
+
+		metadata := make(map[string]string, len(e.Metadata))
+		for k, v := range e.Metadata {
+			metadata[k] = v
+		}
+
+		endpoints[i] = &registry.Endpoint{
+			Name:     e.Name,
+			Request:  request,
+			Response: response,
+			Metadata: metadata,
+		}
+	}
+
+	nodes := make([]*registry.Node, len(r.Nodes))
+	i := 0
+	for _, n := range r.Nodes {
+		metadata := make(map[string]string, len(n.Metadata))
+		for k, v := range n.Metadata {
+			metadata[k] = v
+		}
+
+		nodes[i] = &registry.Node{
+			Id:       n.Id,
+			Address:  n.Address,
+			Metadata: metadata,
+		}
+		i++
+	}
+
+	return &registry.Service{
+		Name:      r.Name,
+		Version:   r.Version,
+		Metadata:  metadata,
+		Endpoints: endpoints,
+		Nodes:     nodes,
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/memory/watcher.go

@@ -0,0 +1,37 @@
+package memory
+
+import (
+	"errors"
+
+	"go-micro.dev/v4/registry"
+)
+
+type Watcher struct {
+	id   string
+	wo   registry.WatchOptions
+	res  chan *registry.Result
+	exit chan bool
+}
+
+func (m *Watcher) Next() (*registry.Result, error) {
+	for {
+		select {
+		case r := <-m.res:
+			if len(m.wo.Service) > 0 && m.wo.Service != r.Service.Name {
+				continue
+			}
+			return r, nil
+		case <-m.exit:
+			return nil, errors.New("watcher stopped")
+		}
+	}
+}
+
+func (m *Watcher) Stop() {
+	select {
+	case <-m.exit:
+		return
+	default:
+		close(m.exit)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/nats/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/registry/nats/nats.go

@@ -0,0 +1,414 @@
+// Package nats provides a NATS registry using broadcast queries
+package nats
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/nats-io/nats.go"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/util/cmd"
+)
+
+type natsRegistry struct {
+	addrs      []string
+	opts       registry.Options
+	nopts      nats.Options
+	queryTopic string
+	watchTopic string
+
+	sync.RWMutex
+	conn      *nats.Conn
+	services  map[string][]*registry.Service
+	listeners map[string]chan bool
+}
+
+var (
+	defaultQueryTopic = "micro.registry.nats.query"
+	defaultWatchTopic = "micro.registry.nats.watch"
+)
+
+func init() {
+	cmd.DefaultRegistries["nats"] = NewRegistry
+}
+
+func configure(n *natsRegistry, opts ...registry.Option) error {
+	for _, o := range opts {
+		o(&n.opts)
+	}
+
+	natsOptions := nats.GetDefaultOptions()
+	if n, ok := n.opts.Context.Value(optionsKey{}).(nats.Options); ok {
+		natsOptions = n
+	}
+
+	queryTopic := defaultQueryTopic
+	if qt, ok := n.opts.Context.Value(queryTopicKey{}).(string); ok {
+		queryTopic = qt
+	}
+
+	watchTopic := defaultWatchTopic
+	if wt, ok := n.opts.Context.Value(watchTopicKey{}).(string); ok {
+		watchTopic = wt
+	}
+
+	// registry.Options have higher priority than nats.Options
+	// only if Addrs, Secure or TLSConfig were not set through a registry.Option
+	// we read them from nats.Option
+	if len(n.opts.Addrs) == 0 {
+		n.opts.Addrs = natsOptions.Servers
+	}
+
+	if !n.opts.Secure {
+		n.opts.Secure = natsOptions.Secure
+	}
+
+	if n.opts.TLSConfig == nil {
+		n.opts.TLSConfig = natsOptions.TLSConfig
+	}
+
+	// check & add nats:// prefix (this makes also sure that the addresses
+	// stored in natsRegistry.addrs and n.opts.Addrs are identical)
+	n.opts.Addrs = setAddrs(n.opts.Addrs)
+
+	n.addrs = n.opts.Addrs
+	n.nopts = natsOptions
+	n.queryTopic = queryTopic
+	n.watchTopic = watchTopic
+
+	return nil
+}
+
+func setAddrs(addrs []string) []string {
+	var cAddrs []string
+	for _, addr := range addrs {
+		if len(addr) == 0 {
+			continue
+		}
+		if !strings.HasPrefix(addr, "nats://") {
+			addr = "nats://" + addr
+		}
+		cAddrs = append(cAddrs, addr)
+	}
+	if len(cAddrs) == 0 {
+		cAddrs = []string{nats.DefaultURL}
+	}
+	return cAddrs
+}
+
+func (n *natsRegistry) newConn() (*nats.Conn, error) {
+	opts := n.nopts
+	opts.Servers = n.addrs
+	opts.Secure = n.opts.Secure
+	opts.TLSConfig = n.opts.TLSConfig
+
+	// secure might not be set
+	if opts.TLSConfig != nil {
+		opts.Secure = true
+	}
+
+	return opts.Connect()
+}
+
+func (n *natsRegistry) getConn() (*nats.Conn, error) {
+	n.Lock()
+	defer n.Unlock()
+
+	if n.conn != nil {
+		return n.conn, nil
+	}
+
+	c, err := n.newConn()
+	if err != nil {
+		return nil, err
+	}
+	n.conn = c
+
+	return n.conn, nil
+}
+
+func (n *natsRegistry) register(s *registry.Service) error {
+	conn, err := n.getConn()
+	if err != nil {
+		return err
+	}
+
+	n.Lock()
+	defer n.Unlock()
+
+	// cache service
+	n.services[s.Name] = addServices(n.services[s.Name], cp([]*registry.Service{s}))
+
+	// create query listener
+	if n.listeners[s.Name] == nil {
+		listener := make(chan bool)
+
+		// create a subscriber that responds to queries
+		sub, err := conn.Subscribe(n.queryTopic, func(m *nats.Msg) {
+			var result *registry.Result
+
+			if err := json.Unmarshal(m.Data, &result); err != nil {
+				return
+			}
+
+			var services []*registry.Service
+
+			switch result.Action {
+			// is this a get query and we own the service?
+			case "get":
+				if result.Service.Name != s.Name {
+					return
+				}
+				n.RLock()
+				services = cp(n.services[s.Name])
+				n.RUnlock()
+			// it's a list request, but we're still only a
+			// subscriber for this service... so just get this service
+			// totally suboptimal
+			case "list":
+				n.RLock()
+				services = cp(n.services[s.Name])
+				n.RUnlock()
+			default:
+				// does not match
+				return
+			}
+
+			// respond to query
+			for _, service := range services {
+				b, err := json.Marshal(service)
+				if err != nil {
+					continue
+				}
+				conn.Publish(m.Reply, b)
+			}
+		})
+		if err != nil {
+			return err
+		}
+
+		// Unsubscribe if we're told to do so
+		go func() {
+			<-listener
+			sub.Unsubscribe()
+		}()
+
+		n.listeners[s.Name] = listener
+	}
+
+	return nil
+}
+
+func (n *natsRegistry) deregister(s *registry.Service) error {
+	n.Lock()
+	defer n.Unlock()
+
+	services := delServices(n.services[s.Name], cp([]*registry.Service{s}))
+	if len(services) > 0 {
+		n.services[s.Name] = services
+		return nil
+	}
+
+	// delete cached service
+	delete(n.services, s.Name)
+
+	// delete query listener
+	if listener, lexists := n.listeners[s.Name]; lexists {
+		close(listener)
+		delete(n.listeners, s.Name)
+	}
+
+	return nil
+}
+
+func (n *natsRegistry) query(s string, quorum int) ([]*registry.Service, error) {
+	conn, err := n.getConn()
+	if err != nil {
+		return nil, err
+	}
+
+	var action string
+	var service *registry.Service
+
+	if len(s) > 0 {
+		action = "get"
+		service = &registry.Service{Name: s}
+	} else {
+		action = "list"
+	}
+
+	inbox := nats.NewInbox()
+
+	response := make(chan *registry.Service, 10)
+
+	sub, err := conn.Subscribe(inbox, func(m *nats.Msg) {
+		var service *registry.Service
+		if err := json.Unmarshal(m.Data, &service); err != nil {
+			return
+		}
+		select {
+		case response <- service:
+		case <-time.After(n.opts.Timeout):
+		}
+	})
+	if err != nil {
+		return nil, err
+	}
+	defer sub.Unsubscribe()
+
+	b, err := json.Marshal(&registry.Result{Action: action, Service: service})
+	if err != nil {
+		return nil, err
+	}
+
+	if err := conn.PublishMsg(&nats.Msg{
+		Subject: n.queryTopic,
+		Reply:   inbox,
+		Data:    b,
+	}); err != nil {
+		return nil, err
+	}
+
+	timeoutChan := time.After(n.opts.Timeout)
+
+	serviceMap := make(map[string]*registry.Service)
+
+loop:
+	for {
+		select {
+		case service := <-response:
+			key := service.Name + "-" + service.Version
+			srv, ok := serviceMap[key]
+			if ok {
+				srv.Nodes = append(srv.Nodes, service.Nodes...)
+				serviceMap[key] = srv
+			} else {
+				serviceMap[key] = service
+			}
+
+			if quorum > 0 && len(serviceMap[key].Nodes) >= quorum {
+				break loop
+			}
+		case <-timeoutChan:
+			break loop
+		}
+	}
+
+	var services []*registry.Service
+	for _, service := range serviceMap {
+		services = append(services, service)
+	}
+	return services, nil
+}
+
+func (n *natsRegistry) Init(opts ...registry.Option) error {
+	return configure(n, opts...)
+}
+
+func (n *natsRegistry) Options() registry.Options {
+	return n.opts
+}
+
+func (n *natsRegistry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
+	if err := n.register(s); err != nil {
+		return err
+	}
+
+	conn, err := n.getConn()
+	if err != nil {
+		return err
+	}
+
+	b, err := json.Marshal(&registry.Result{Action: "create", Service: s})
+	if err != nil {
+		return err
+	}
+
+	return conn.Publish(n.watchTopic, b)
+}
+
+func (n *natsRegistry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
+	if err := n.deregister(s); err != nil {
+		return err
+	}
+
+	conn, err := n.getConn()
+	if err != nil {
+		return err
+	}
+
+	b, err := json.Marshal(&registry.Result{Action: "delete", Service: s})
+	if err != nil {
+		return err
+	}
+	return conn.Publish(n.watchTopic, b)
+}
+
+func (n *natsRegistry) GetService(s string, opts ...registry.GetOption) ([]*registry.Service, error) {
+	services, err := n.query(s, getQuorum(n.opts))
+	if err != nil {
+		return nil, err
+	}
+	return services, nil
+}
+
+func (n *natsRegistry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
+	s, err := n.query("", 0)
+	if err != nil {
+		return nil, err
+	}
+
+	var services []*registry.Service
+	serviceMap := make(map[string]*registry.Service)
+
+	for _, v := range s {
+		serviceMap[v.Name] = &registry.Service{Name: v.Name, Version: v.Version}
+	}
+
+	for _, v := range serviceMap {
+		services = append(services, v)
+	}
+
+	return services, nil
+}
+
+func (n *natsRegistry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
+	conn, err := n.getConn()
+	if err != nil {
+		return nil, err
+	}
+
+	sub, err := conn.SubscribeSync(n.watchTopic)
+	if err != nil {
+		return nil, err
+	}
+
+	var wo registry.WatchOptions
+	for _, o := range opts {
+		o(&wo)
+	}
+
+	return &natsWatcher{sub, wo}, nil
+}
+
+func (n *natsRegistry) String() string {
+	return "nats"
+}
+
+func NewRegistry(opts ...registry.Option) registry.Registry {
+	options := registry.Options{
+		Timeout: time.Millisecond * 100,
+		Context: context.Background(),
+	}
+
+	n := &natsRegistry{
+		opts:      options,
+		services:  make(map[string][]*registry.Service),
+		listeners: make(map[string]chan bool),
+	}
+	configure(n, opts...)
+	return n
+}

vendor/github.com/go-micro/plugins/v4/registry/nats/options.go

@@ -0,0 +1,72 @@
+package nats
+
+import (
+	"context"
+
+	"github.com/nats-io/nats.go"
+	"go-micro.dev/v4/registry"
+)
+
+type contextQuorumKey struct{}
+type optionsKey struct{}
+type watchTopicKey struct{}
+type queryTopicKey struct{}
+
+var (
+	DefaultQuorum = 0
+)
+
+func getQuorum(o registry.Options) int {
+	if o.Context == nil {
+		return DefaultQuorum
+	}
+
+	value := o.Context.Value(contextQuorumKey{})
+	if v, ok := value.(int); ok {
+		return v
+	} else {
+		return DefaultQuorum
+	}
+}
+
+func Quorum(n int) registry.Option {
+	return func(o *registry.Options) {
+		o.Context = context.WithValue(o.Context, contextQuorumKey{}, n)
+	}
+}
+
+// Options allow to inject a nats.Options struct for configuring
+// the nats connection.
+func Options(nopts nats.Options) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, optionsKey{}, nopts)
+	}
+}
+
+// QueryTopic allows to set a custom nats topic on which service registries
+// query (survey) other services. All registries listen on this topic and
+// then respond to the query message.
+func QueryTopic(s string) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, queryTopicKey{}, s)
+	}
+}
+
+// WatchTopic allows to set a custom nats topic on which registries broadcast
+// changes (e.g. when services are added, updated or removed). Since we don't
+// have a central registry service, each service typically broadcasts in a
+// determined frequency on this topic.
+func WatchTopic(s string) registry.Option {
+	return func(o *registry.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, watchTopicKey{}, s)
+	}
+}

vendor/github.com/go-micro/plugins/v4/registry/nats/util.go

@@ -0,0 +1,109 @@
+package nats
+
+import (
+	"go-micro.dev/v4/registry"
+)
+
+func cp(current []*registry.Service) []*registry.Service {
+	var services []*registry.Service
+
+	for _, service := range current {
+		// copy service
+		s := new(registry.Service)
+		*s = *service
+
+		// copy nodes
+		var nodes []*registry.Node
+		for _, node := range service.Nodes {
+			n := new(registry.Node)
+			*n = *node
+			nodes = append(nodes, n)
+		}
+		s.Nodes = nodes
+
+		// copy endpoints
+		var eps []*registry.Endpoint
+		for _, ep := range service.Endpoints {
+			e := new(registry.Endpoint)
+			*e = *ep
+			eps = append(eps, e)
+		}
+		s.Endpoints = eps
+
+		// append service
+		services = append(services, s)
+	}
+
+	return services
+}
+
+func addNodes(old, neu []*registry.Node) []*registry.Node {
+	for _, n := range neu {
+		var seen bool
+		for i, o := range old {
+			if o.Id == n.Id {
+				seen = true
+				old[i] = n
+				break
+			}
+		}
+		if !seen {
+			old = append(old, n)
+		}
+	}
+	return old
+}
+
+func addServices(old, neu []*registry.Service) []*registry.Service {
+	for _, s := range neu {
+		var seen bool
+		for i, o := range old {
+			if o.Version == s.Version {
+				s.Nodes = addNodes(o.Nodes, s.Nodes)
+				seen = true
+				old[i] = s
+				break
+			}
+		}
+		if !seen {
+			old = append(old, s)
+		}
+	}
+	return old
+}
+
+func delNodes(old, del []*registry.Node) []*registry.Node {
+	var nodes []*registry.Node
+	for _, o := range old {
+		var rem bool
+		for _, n := range del {
+			if o.Id == n.Id {
+				rem = true
+				break
+			}
+		}
+		if !rem {
+			nodes = append(nodes, o)
+		}
+	}
+	return nodes
+}
+
+func delServices(old, del []*registry.Service) []*registry.Service {
+	var services []*registry.Service
+	for i, o := range old {
+		var rem bool
+		for _, s := range del {
+			if o.Version == s.Version {
+				old[i].Nodes = delNodes(o.Nodes, s.Nodes)
+				if len(old[i].Nodes) == 0 {
+					rem = true
+				}
+			}
+		}
+		if !rem {
+			services = append(services, o)
+		}
+	}
+	return services
+}

vendor/github.com/go-micro/plugins/v4/registry/nats/watcher.go

@@ -0,0 +1,39 @@
+package nats
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/nats-io/nats.go"
+	"go-micro.dev/v4/registry"
+)
+
+type natsWatcher struct {
+	sub *nats.Subscription
+	wo  registry.WatchOptions
+}
+
+func (n *natsWatcher) Next() (*registry.Result, error) {
+	var result *registry.Result
+	for {
+		m, err := n.sub.NextMsg(time.Minute)
+		if err != nil && err == nats.ErrTimeout {
+			continue
+		} else if err != nil {
+			return nil, err
+		}
+		if err := json.Unmarshal(m.Data, &result); err != nil {
+			return nil, err
+		}
+		if len(n.wo.Service) > 0 && result.Service.Name != n.wo.Service {
+			continue
+		}
+		break
+	}
+
+	return result, nil
+}
+
+func (n *natsWatcher) Stop() {
+	n.sub.Unsubscribe()
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/server/grpc/README.md

@@ -0,0 +1,30 @@
+# GRPC Server
+
+The grpc server is a [micro.Server](https://pkg.go.dev/github.com/asim/go-micro/server#Server) compatible server.
+
+## Overview
+
+The server makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying server 
+but continues to use micro handler signatures and protoc-gen-micro generated code.
+
+## Usage
+
+Specify the server to your micro service
+
+```go
+import (
+        "go-micro.dev/v4"
+        "github.com/go-micro/plugins/v4/server/grpc"
+)
+
+func main() {
+        service := micro.NewService(
+                // This needs to be first as it replaces the underlying server
+                // which causes any configuration set before it
+                // to be discarded
+                micro.Server(grpc.NewServer()),
+                micro.Name("greeter"),
+        )
+}
+```
+**NOTE**: Setting the gRPC server and/or client causes the underlying the server/client to be replaced which causes any previous configuration set on that server/client to be discarded. It is therefore recommended to set gRPC server/client before any other configuration

vendor/github.com/go-micro/plugins/v4/server/grpc/codec.go

@@ -0,0 +1,186 @@
+package grpc
+
+import (
+	"encoding/json"
+	"strings"
+
+	b "bytes"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/codec/bytes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/grpc/metadata"
+)
+
+type jsonCodec struct{}
+type bytesCodec struct{}
+type protoCodec struct{}
+type wrapCodec struct{ encoding.Codec }
+
+var jsonpbMarshaler = &jsonpb.Marshaler{
+	EnumsAsInts:  false,
+	EmitDefaults: false,
+	OrigName:     true,
+}
+
+var (
+	defaultGRPCCodecs = map[string]encoding.Codec{
+		"application/json":         jsonCodec{},
+		"application/proto":        protoCodec{},
+		"application/protobuf":     protoCodec{},
+		"application/octet-stream": protoCodec{},
+		"application/grpc":         protoCodec{},
+		"application/grpc+json":    jsonCodec{},
+		"application/grpc+proto":   protoCodec{},
+		"application/grpc+bytes":   bytesCodec{},
+	}
+)
+
+func (w wrapCodec) String() string {
+	return w.Codec.Name()
+}
+
+func (w wrapCodec) Marshal(v interface{}) ([]byte, error) {
+	b, ok := v.(*bytes.Frame)
+	if ok {
+		return b.Data, nil
+	}
+	return w.Codec.Marshal(v)
+}
+
+func (w wrapCodec) Unmarshal(data []byte, v interface{}) error {
+	b, ok := v.(*bytes.Frame)
+	if ok {
+		b.Data = data
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+	return w.Codec.Unmarshal(data, v)
+}
+
+func (protoCodec) Marshal(v interface{}) ([]byte, error) {
+	m, ok := v.(proto.Message)
+	if !ok {
+		return nil, codec.ErrInvalidMessage
+	}
+	return proto.Marshal(m)
+}
+
+func (protoCodec) Unmarshal(data []byte, v interface{}) error {
+	m, ok := v.(proto.Message)
+	if !ok {
+		return codec.ErrInvalidMessage
+	}
+	return proto.Unmarshal(data, m)
+}
+
+func (protoCodec) Name() string {
+	return "proto"
+}
+
+func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
+	if pb, ok := v.(proto.Message); ok {
+		s, err := jsonpbMarshaler.MarshalToString(pb)
+		return []byte(s), err
+	}
+
+	return json.Marshal(v)
+}
+
+func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if pb, ok := v.(proto.Message); ok {
+		return jsonpb.Unmarshal(b.NewReader(data), pb)
+	}
+	return json.Unmarshal(data, v)
+}
+
+func (jsonCodec) Name() string {
+	return "json"
+}
+
+func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return nil, codec.ErrInvalidMessage
+	}
+	return *b, nil
+}
+
+func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return codec.ErrInvalidMessage
+	}
+	*b = data
+	return nil
+}
+
+func (bytesCodec) Name() string {
+	return "bytes"
+}
+
+type grpcCodec struct {
+	// headers
+	id       string
+	target   string
+	method   string
+	endpoint string
+
+	s grpc.ServerStream
+	c encoding.Codec
+}
+
+func (g *grpcCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
+	md, _ := metadata.FromIncomingContext(g.s.Context())
+	if m == nil {
+		m = new(codec.Message)
+	}
+	if m.Header == nil {
+		m.Header = make(map[string]string, len(md))
+	}
+	for k, v := range md {
+		m.Header[k] = strings.Join(v, ",")
+	}
+	m.Id = g.id
+	m.Target = g.target
+	m.Method = g.method
+	m.Endpoint = g.endpoint
+	return nil
+}
+
+func (g *grpcCodec) ReadBody(v interface{}) error {
+	// caller has requested a frame
+	if f, ok := v.(*bytes.Frame); ok {
+		return g.s.RecvMsg(f)
+	}
+	return g.s.RecvMsg(v)
+}
+
+func (g *grpcCodec) Write(m *codec.Message, v interface{}) error {
+	// if we don't have a body
+	if v != nil {
+		b, err := g.c.Marshal(v)
+		if err != nil {
+			return err
+		}
+		m.Body = b
+	}
+	// write the body using the framing codec
+	return g.s.SendMsg(&bytes.Frame{Data: m.Body})
+}
+
+func (g *grpcCodec) Close() error {
+	return nil
+}
+
+func (g *grpcCodec) String() string {
+	return "grpc"
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/context.go

@@ -0,0 +1,16 @@
+package grpc
+
+import (
+	"context"
+
+	"go-micro.dev/v4/server"
+)
+
+func setServerOption(k, v interface{}) server.Option {
+	return func(o *server.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, k, v)
+	}
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/error.go

@@ -0,0 +1,42 @@
+package grpc
+
+import (
+	"net/http"
+
+	"go-micro.dev/v4/errors"
+	"google.golang.org/grpc/codes"
+)
+
+func microError(err *errors.Error) codes.Code {
+	switch err {
+	case nil:
+		return codes.OK
+	}
+
+	switch err.Code {
+	case http.StatusOK:
+		return codes.OK
+	case http.StatusBadRequest:
+		return codes.InvalidArgument
+	case http.StatusRequestTimeout:
+		return codes.DeadlineExceeded
+	case http.StatusNotFound:
+		return codes.NotFound
+	case http.StatusConflict:
+		return codes.AlreadyExists
+	case http.StatusForbidden:
+		return codes.PermissionDenied
+	case http.StatusUnauthorized:
+		return codes.Unauthenticated
+	case http.StatusPreconditionFailed:
+		return codes.FailedPrecondition
+	case http.StatusNotImplemented:
+		return codes.Unimplemented
+	case http.StatusInternalServerError:
+		return codes.Internal
+	case http.StatusServiceUnavailable:
+		return codes.Unavailable
+	}
+
+	return codes.Unknown
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/extractor.go

@@ -0,0 +1,125 @@
+package grpc
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"go-micro.dev/v4/registry"
+)
+
+func extractValue(v reflect.Type, d int) *registry.Value {
+	if d == 3 {
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+
+	if v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	arg := &registry.Value{
+		Name: v.Name(),
+		Type: v.Name(),
+	}
+
+	switch v.Kind() {
+	case reflect.Struct:
+		for i := 0; i < v.NumField(); i++ {
+			f := v.Field(i)
+			if f.PkgPath != "" {
+				continue
+			}
+			val := extractValue(f.Type, d+1)
+			if val == nil {
+				continue
+			}
+
+			// if we can find a json tag use it
+			if tags := f.Tag.Get("json"); len(tags) > 0 {
+				parts := strings.Split(tags, ",")
+				if parts[0] == "-" || parts[0] == "omitempty" {
+					continue
+				}
+				val.Name = parts[0]
+			}
+
+			// if there's no name default it
+			if len(val.Name) == 0 {
+				val.Name = v.Field(i).Name
+			}
+
+			arg.Values = append(arg.Values, val)
+		}
+	case reflect.Slice:
+		p := v.Elem()
+		if p.Kind() == reflect.Ptr {
+			p = p.Elem()
+		}
+		arg.Type = "[]" + p.Name()
+	}
+
+	return arg
+}
+
+func extractEndpoint(method reflect.Method) *registry.Endpoint {
+	if method.PkgPath != "" {
+		return nil
+	}
+
+	var rspType, reqType reflect.Type
+	var stream bool
+	mt := method.Type
+
+	switch mt.NumIn() {
+	case 3:
+		reqType = mt.In(1)
+		rspType = mt.In(2)
+	case 4:
+		reqType = mt.In(2)
+		rspType = mt.In(3)
+	default:
+		return nil
+	}
+
+	// are we dealing with a stream?
+	switch rspType.Kind() {
+	case reflect.Func, reflect.Interface:
+		stream = true
+	}
+
+	request := extractValue(reqType, 0)
+	response := extractValue(rspType, 0)
+
+	ep := &registry.Endpoint{
+		Name:     method.Name,
+		Request:  request,
+		Response: response,
+		Metadata: make(map[string]string),
+	}
+
+	if stream {
+		ep.Metadata = map[string]string{
+			"stream": fmt.Sprintf("%v", stream),
+		}
+	}
+
+	return ep
+}
+
+func extractSubValue(typ reflect.Type) *registry.Value {
+	var reqType reflect.Type
+	switch typ.NumIn() {
+	case 1:
+		reqType = typ.In(0)
+	case 2:
+		reqType = typ.In(1)
+	case 3:
+		reqType = typ.In(2)
+	default:
+		return nil
+	}
+	return extractValue(reqType, 0)
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/handler.go

@@ -0,0 +1,66 @@
+package grpc
+
+import (
+	"reflect"
+
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+type rpcHandler struct {
+	name      string
+	handler   interface{}
+	endpoints []*registry.Endpoint
+	opts      server.HandlerOptions
+}
+
+func newRpcHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+	options := server.HandlerOptions{
+		Metadata: make(map[string]map[string]string),
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	typ := reflect.TypeOf(handler)
+	hdlr := reflect.ValueOf(handler)
+	name := reflect.Indirect(hdlr).Type().Name()
+
+	var endpoints []*registry.Endpoint
+
+	for m := 0; m < typ.NumMethod(); m++ {
+		if e := extractEndpoint(typ.Method(m)); e != nil {
+			e.Name = name + "." + e.Name
+
+			for k, v := range options.Metadata[e.Name] {
+				e.Metadata[k] = v
+			}
+
+			endpoints = append(endpoints, e)
+		}
+	}
+
+	return &rpcHandler{
+		name:      name,
+		handler:   handler,
+		endpoints: endpoints,
+		opts:      options,
+	}
+}
+
+func (r *rpcHandler) Name() string {
+	return r.name
+}
+
+func (r *rpcHandler) Handler() interface{} {
+	return r.handler
+}
+
+func (r *rpcHandler) Endpoints() []*registry.Endpoint {
+	return r.endpoints
+}
+
+func (r *rpcHandler) Options() server.HandlerOptions {
+	return r.opts
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/options.go

@@ -0,0 +1,95 @@
+package grpc
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+	"go-micro.dev/v4/transport"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+)
+
+type codecsKey struct{}
+type grpcOptions struct{}
+type netListener struct{}
+type maxMsgSizeKey struct{}
+type maxConnKey struct{}
+type tlsAuth struct{}
+type grpcServerKey struct{}
+
+// gRPC Codec to be used to encode/decode requests for a given content type.
+func Codec(contentType string, c encoding.Codec) server.Option {
+	return func(o *server.Options) {
+		codecs := make(map[string]encoding.Codec)
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		if v, ok := o.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && v != nil {
+			codecs = v
+		}
+		codecs[contentType] = c
+		o.Context = context.WithValue(o.Context, codecsKey{}, codecs)
+	}
+}
+
+// AuthTLS should be used to setup a secure authentication using TLS.
+func AuthTLS(t *tls.Config) server.Option {
+	return setServerOption(tlsAuth{}, t)
+}
+
+// MaxConn specifies maximum number of max simultaneous connections to server.
+func MaxConn(n int) server.Option {
+	return setServerOption(maxConnKey{}, n)
+}
+
+// Listener specifies the net.Listener to use instead of the default.
+func Listener(l net.Listener) server.Option {
+	return setServerOption(netListener{}, l)
+}
+
+// Server specifies a *grpc.Server to use instead of the default
+// This is for rare use case where user need to expose grpc.Server for
+// customization. Please NOTE however user injected grpcServer doesn't support
+// server Handler abstraction.
+func Server(srv *grpc.Server) server.Option {
+	return setServerOption(grpcServerKey{}, srv)
+}
+
+// Options to be used to configure gRPC options.
+func Options(opts ...grpc.ServerOption) server.Option {
+	return setServerOption(grpcOptions{}, opts)
+}
+
+// MaxMsgSize set the maximum message in bytes the server can receive and
+// send.  Default maximum message size is 4 MB.
+func MaxMsgSize(s int) server.Option {
+	return setServerOption(maxMsgSizeKey{}, s)
+}
+
+func newOptions(opt ...server.Option) server.Options {
+	opts := server.Options{
+		Codecs:        make(map[string]codec.NewCodec),
+		Metadata:      map[string]string{},
+		Broker:        broker.DefaultBroker,
+		Registry:      registry.DefaultRegistry,
+		RegisterCheck: server.DefaultRegisterCheck,
+		Transport:     transport.DefaultTransport,
+		Address:       server.DefaultAddress,
+		Name:          server.DefaultName,
+		Id:            server.DefaultId,
+		Version:       server.DefaultVersion,
+		Logger:        logger.DefaultLogger,
+	}
+
+	for _, o := range opt {
+		o(&opts)
+	}
+
+	return opts
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/request.go

@@ -0,0 +1,90 @@
+package grpc
+
+import (
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/codec/bytes"
+)
+
+type rpcRequest struct {
+	service     string
+	method      string
+	contentType string
+	codec       codec.Codec
+	header      map[string]string
+	body        []byte
+	stream      bool
+	payload     interface{}
+}
+
+type rpcMessage struct {
+	topic       string
+	contentType string
+	payload     interface{}
+	header      map[string]string
+	body        []byte
+	codec       codec.Codec
+}
+
+func (r *rpcRequest) ContentType() string {
+	return r.contentType
+}
+
+func (r *rpcRequest) Service() string {
+	return r.service
+}
+
+func (r *rpcRequest) Method() string {
+	return r.method
+}
+
+func (r *rpcRequest) Endpoint() string {
+	return r.method
+}
+
+func (r *rpcRequest) Codec() codec.Reader {
+	return r.codec
+}
+
+func (r *rpcRequest) Header() map[string]string {
+	return r.header
+}
+
+func (r *rpcRequest) Read() ([]byte, error) {
+	f := &bytes.Frame{}
+	if err := r.codec.ReadBody(f); err != nil {
+		return nil, err
+	}
+	return f.Data, nil
+}
+
+func (r *rpcRequest) Stream() bool {
+	return r.stream
+}
+
+func (r *rpcRequest) Body() interface{} {
+	return r.payload
+}
+
+func (r *rpcMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *rpcMessage) Topic() string {
+	return r.topic
+}
+
+func (r *rpcMessage) Payload() interface{} {
+	return r.payload
+}
+
+func (r *rpcMessage) Header() map[string]string {
+	return r.header
+}
+
+func (r *rpcMessage) Body() []byte {
+	return r.body
+}
+
+func (r *rpcMessage) Codec() codec.Reader {
+	return r.codec
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/response.go

@@ -0,0 +1,27 @@
+package grpc
+
+import (
+	"go-micro.dev/v4/codec"
+)
+
+type rpcResponse struct {
+	header map[string]string
+	codec  codec.Codec
+}
+
+func (r *rpcResponse) Codec() codec.Writer {
+	return r.codec
+}
+
+func (r *rpcResponse) WriteHeader(hdr map[string]string) {
+	for k, v := range hdr {
+		r.header[k] = v
+	}
+}
+
+func (r *rpcResponse) Write(b []byte) error {
+	return r.codec.Write(&codec.Message{
+		Header: r.header,
+		Body:   b,
+	}, nil)
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/server.go

@@ -0,0 +1,182 @@
+package grpc
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// Meh, we need to get rid of this shit
+
+import (
+	"context"
+	"errors"
+	"reflect"
+	"sync"
+	"unicode"
+	"unicode/utf8"
+
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/server"
+)
+
+var (
+	// Precompute the reflect type for error. Can't use error directly
+	// because Typeof takes an empty interface value. This is annoying.
+	typeOfError = reflect.TypeOf((*error)(nil)).Elem()
+)
+
+type methodType struct {
+	method      reflect.Method
+	ArgType     reflect.Type
+	ReplyType   reflect.Type
+	ContextType reflect.Type
+	stream      bool
+}
+
+type service struct {
+	name   string                 // name of service
+	rcvr   reflect.Value          // receiver of methods for the service
+	typ    reflect.Type           // type of the receiver
+	method map[string]*methodType // registered methods
+}
+
+// server represents an RPC Server.
+type rServer struct {
+	mu         sync.Mutex // protects the serviceMap
+	serviceMap map[string]*service
+	logger     logger.Logger
+}
+
+// Is this an exported - upper case - name?
+func isExported(name string) bool {
+	rune, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(rune)
+}
+
+// Is this type exported or a builtin?
+func isExportedOrBuiltinType(t reflect.Type) bool {
+	for t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+	// PkgPath will be non-empty even for an exported type,
+	// so we need to check the type name as well.
+	return isExported(t.Name()) || t.PkgPath() == ""
+}
+
+// prepareEndpoint() returns a methodType for the provided method or nil
+// in case if the method was unsuitable.
+func prepareEndpoint(method reflect.Method, log logger.Logger) *methodType {
+	mtype := method.Type
+	mname := method.Name
+	var replyType, argType, contextType reflect.Type
+	var stream bool
+
+	// Endpoint() must be exported.
+	if method.PkgPath != "" {
+		return nil
+	}
+
+	switch mtype.NumIn() {
+	case 3:
+		// assuming streaming
+		argType = mtype.In(2)
+		contextType = mtype.In(1)
+		stream = true
+	case 4:
+		// method that takes a context
+		argType = mtype.In(2)
+		replyType = mtype.In(3)
+		contextType = mtype.In(1)
+	default:
+		log.Logf(logger.ErrorLevel, "method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
+		return nil
+	}
+
+	if stream {
+		// check stream type
+		streamType := reflect.TypeOf((*server.Stream)(nil)).Elem()
+		if !argType.Implements(streamType) {
+			log.Logf(logger.ErrorLevel, "%v argument does not implement Streamer interface: %v", mname, argType)
+			return nil
+		}
+	} else {
+		// if not stream check the replyType
+
+		// First arg need not be a pointer.
+		if !isExportedOrBuiltinType(argType) {
+			log.Logf(logger.ErrorLevel, "%v argument type not exported: %v", mname, argType)
+			return nil
+		}
+
+		if replyType.Kind() != reflect.Ptr {
+			log.Logf(logger.ErrorLevel, "method %v reply type not a pointer: %v", mname, replyType)
+			return nil
+		}
+
+		// Reply type must be exported.
+		if !isExportedOrBuiltinType(replyType) {
+			log.Logf(logger.ErrorLevel, "method %v reply type not exported: %v", mname, replyType)
+			return nil
+		}
+	}
+
+	// Endpoint() needs one out.
+	if mtype.NumOut() != 1 {
+		log.Logf(logger.ErrorLevel, "method %v has wrong number of outs: %v", mname, mtype.NumOut())
+		return nil
+	}
+	// The return type of the method must be error.
+	if returnType := mtype.Out(0); returnType != typeOfError {
+		log.Logf(logger.ErrorLevel, "method %v returns %v not error", mname, returnType.String())
+		return nil
+	}
+	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
+}
+
+func (server *rServer) register(rcvr interface{}) error {
+	server.mu.Lock()
+	defer server.mu.Unlock()
+	log := server.logger
+	if server.serviceMap == nil {
+		server.serviceMap = make(map[string]*service)
+	}
+	s := new(service)
+	s.typ = reflect.TypeOf(rcvr)
+	s.rcvr = reflect.ValueOf(rcvr)
+	sname := reflect.Indirect(s.rcvr).Type().Name()
+	if sname == "" {
+		logger.Fatalf("rpc: no service name for type %v", s.typ.String())
+	}
+	if !isExported(sname) {
+		s := "rpc Register: type " + sname + " is not exported"
+		log.Log(logger.ErrorLevel, s)
+		return errors.New(s)
+	}
+	if _, present := server.serviceMap[sname]; present {
+		return errors.New("rpc: service already defined: " + sname)
+	}
+	s.name = sname
+	s.method = make(map[string]*methodType)
+
+	// Install the methods
+	for m := 0; m < s.typ.NumMethod(); m++ {
+		method := s.typ.Method(m)
+		if mt := prepareEndpoint(method, log); mt != nil {
+			s.method[method.Name] = mt
+		}
+	}
+
+	if len(s.method) == 0 {
+		s := "rpc Register: type " + sname + " has no exported methods of suitable type"
+		log.Log(logger.ErrorLevel, s)
+		return errors.New(s)
+	}
+	server.serviceMap[s.name] = s
+	return nil
+}
+
+func (m *methodType) prepareContext(ctx context.Context) reflect.Value {
+	if contextv := reflect.ValueOf(ctx); contextv.IsValid() {
+		return contextv
+	}
+	return reflect.Zero(m.ContextType)
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/stream.go

@@ -0,0 +1,38 @@
+package grpc
+
+import (
+	"context"
+
+	"go-micro.dev/v4/server"
+	"google.golang.org/grpc"
+)
+
+// rpcStream implements a server side Stream.
+type rpcStream struct {
+	s       grpc.ServerStream
+	request server.Request
+}
+
+func (r *rpcStream) Close() error {
+	return nil
+}
+
+func (r *rpcStream) Error() error {
+	return nil
+}
+
+func (r *rpcStream) Request() server.Request {
+	return r.request
+}
+
+func (r *rpcStream) Context() context.Context {
+	return r.s.Context()
+}
+
+func (r *rpcStream) Send(m interface{}) error {
+	return r.s.SendMsg(m)
+}
+
+func (r *rpcStream) Recv(m interface{}) error {
+	return r.s.RecvMsg(m)
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/subscriber.go

@@ -0,0 +1,291 @@
+package grpc
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"runtime/debug"
+	"strings"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/errors"
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/metadata"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+const (
+	subSig = "func(context.Context, interface{}) error"
+)
+
+type handler struct {
+	method  reflect.Value
+	reqType reflect.Type
+	ctxType reflect.Type
+}
+
+type subscriber struct {
+	topic      string
+	rcvr       reflect.Value
+	typ        reflect.Type
+	subscriber interface{}
+	handlers   []*handler
+	endpoints  []*registry.Endpoint
+	opts       server.SubscriberOptions
+}
+
+func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	options := server.SubscriberOptions{
+		AutoAck: true,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	var endpoints []*registry.Endpoint
+	var handlers []*handler
+
+	if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
+		h := &handler{
+			method: reflect.ValueOf(sub),
+		}
+
+		switch typ.NumIn() {
+		case 1:
+			h.reqType = typ.In(0)
+		case 2:
+			h.ctxType = typ.In(0)
+			h.reqType = typ.In(1)
+		}
+
+		handlers = append(handlers, h)
+
+		endpoints = append(endpoints, &registry.Endpoint{
+			Name:    "Func",
+			Request: extractSubValue(typ),
+			Metadata: map[string]string{
+				"topic":      topic,
+				"subscriber": "true",
+			},
+		})
+	} else {
+		hdlr := reflect.ValueOf(sub)
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+			h := &handler{
+				method: method.Func,
+			}
+
+			switch method.Type.NumIn() {
+			case 2:
+				h.reqType = method.Type.In(1)
+			case 3:
+				h.ctxType = method.Type.In(1)
+				h.reqType = method.Type.In(2)
+			}
+
+			handlers = append(handlers, h)
+
+			endpoints = append(endpoints, &registry.Endpoint{
+				Name:    name + "." + method.Name,
+				Request: extractSubValue(method.Type),
+				Metadata: map[string]string{
+					"topic":      topic,
+					"subscriber": "true",
+				},
+			})
+		}
+	}
+
+	return &subscriber{
+		rcvr:       reflect.ValueOf(sub),
+		typ:        reflect.TypeOf(sub),
+		topic:      topic,
+		subscriber: sub,
+		handlers:   handlers,
+		endpoints:  endpoints,
+		opts:       options,
+	}
+}
+
+func validateSubscriber(sub server.Subscriber) error {
+	typ := reflect.TypeOf(sub.Subscriber())
+	var argType reflect.Type
+
+	if typ.Kind() == reflect.Func {
+		name := "Func"
+		switch typ.NumIn() {
+		case 2:
+			argType = typ.In(1)
+		default:
+			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
+		}
+		if !isExportedOrBuiltinType(argType) {
+			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
+		}
+		if typ.NumOut() != 1 {
+			return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
+				name, typ.NumOut(), subSig)
+		}
+		if returnType := typ.Out(0); returnType != typeOfError {
+			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
+		}
+	} else {
+		hdlr := reflect.ValueOf(sub.Subscriber())
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+
+			switch method.Type.NumIn() {
+			case 3:
+				argType = method.Type.In(2)
+			default:
+				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
+					name, method.Name, method.Type.NumIn(), subSig)
+			}
+
+			if !isExportedOrBuiltinType(argType) {
+				return fmt.Errorf("%v argument type not exported: %v", name, argType)
+			}
+			if method.Type.NumOut() != 1 {
+				return fmt.Errorf(
+					"subscriber %v.%v has wrong number of outs: %v require signature %s",
+					name, method.Name, method.Type.NumOut(), subSig)
+			}
+			if returnType := method.Type.Out(0); returnType != typeOfError {
+				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
+			}
+		}
+	}
+
+	return nil
+}
+
+func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
+	return func(p broker.Event) (err error) {
+		defer func() {
+			if r := recover(); r != nil {
+				g.opts.Logger.Log(logger.ErrorLevel, "panic recovered: ", r)
+				g.opts.Logger.Log(logger.ErrorLevel, string(debug.Stack()))
+				err = errors.InternalServerError("go.micro.server", "panic recovered: %v", r)
+			}
+		}()
+
+		msg := p.Message()
+		// if we don't have headers, create empty map
+		if msg.Header == nil {
+			msg.Header = make(map[string]string)
+		}
+
+		ct := msg.Header["Content-Type"]
+		if len(ct) == 0 {
+			msg.Header["Content-Type"] = defaultContentType
+			ct = defaultContentType
+		}
+		cf, err := g.newGRPCCodec(ct)
+		if err != nil {
+			return err
+		}
+
+		hdr := make(map[string]string, len(msg.Header))
+		for k, v := range msg.Header {
+			hdr[k] = v
+		}
+		delete(hdr, "Content-Type")
+		ctx := metadata.NewContext(context.Background(), hdr)
+
+		results := make(chan error, len(sb.handlers))
+
+		for i := 0; i < len(sb.handlers); i++ {
+			handler := sb.handlers[i]
+
+			var isVal bool
+			var req reflect.Value
+
+			if handler.reqType.Kind() == reflect.Ptr {
+				req = reflect.New(handler.reqType.Elem())
+			} else {
+				req = reflect.New(handler.reqType)
+				isVal = true
+			}
+			if isVal {
+				req = req.Elem()
+			}
+
+			if err = cf.Unmarshal(msg.Body, req.Interface()); err != nil {
+				return err
+			}
+
+			fn := func(ctx context.Context, msg server.Message) error {
+				var vals []reflect.Value
+				if sb.typ.Kind() != reflect.Func {
+					vals = append(vals, sb.rcvr)
+				}
+				if handler.ctxType != nil {
+					vals = append(vals, reflect.ValueOf(ctx))
+				}
+
+				vals = append(vals, reflect.ValueOf(msg.Payload()))
+
+				returnValues := handler.method.Call(vals)
+				if rerr := returnValues[0].Interface(); rerr != nil {
+					return rerr.(error)
+				}
+				return nil
+			}
+
+			for i := len(opts.SubWrappers); i > 0; i-- {
+				fn = opts.SubWrappers[i-1](fn)
+			}
+
+			if g.wg != nil {
+				g.wg.Add(1)
+			}
+			go func() {
+				if g.wg != nil {
+					defer g.wg.Done()
+				}
+				err := fn(ctx, &rpcMessage{
+					topic:       sb.topic,
+					contentType: ct,
+					payload:     req.Interface(),
+					header:      msg.Header,
+					body:        msg.Body,
+				})
+				results <- err
+			}()
+		}
+		var errors []string
+		for i := 0; i < len(sb.handlers); i++ {
+			if rerr := <-results; rerr != nil {
+				errors = append(errors, rerr.Error())
+			}
+		}
+		if len(errors) > 0 {
+			err = fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
+		}
+
+		return err
+	}
+}
+
+func (s *subscriber) Topic() string {
+	return s.topic
+}
+
+func (s *subscriber) Subscriber() interface{} {
+	return s.subscriber
+}
+
+func (s *subscriber) Endpoints() []*registry.Endpoint {
+	return s.endpoints
+}
+
+func (s *subscriber) Options() server.SubscriberOptions {
+	return s.opts
+}

vendor/github.com/go-micro/plugins/v4/server/grpc/util.go

@@ -0,0 +1,49 @@
+package grpc
+
+import (
+	"context"
+	"io"
+	"os"
+	"sync"
+
+	"google.golang.org/grpc/codes"
+)
+
+// convertCode converts a standard Go error into its canonical code. Note that
+// this is only used to translate the error returned by the server applications.
+func convertCode(err error) codes.Code {
+	switch err {
+	case nil:
+		return codes.OK
+	case io.EOF:
+		return codes.OutOfRange
+	case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
+		return codes.FailedPrecondition
+	case os.ErrInvalid:
+		return codes.InvalidArgument
+	case context.Canceled:
+		return codes.Canceled
+	case context.DeadlineExceeded:
+		return codes.DeadlineExceeded
+	}
+	switch {
+	case os.IsExist(err):
+		return codes.AlreadyExists
+	case os.IsNotExist(err):
+		return codes.NotFound
+	case os.IsPermission(err):
+		return codes.PermissionDenied
+	}
+	return codes.Unknown
+}
+
+func wait(ctx context.Context) *sync.WaitGroup {
+	if ctx == nil {
+		return nil
+	}
+	wg, ok := ctx.Value("wait").(*sync.WaitGroup)
+	if !ok {
+		return nil
+	}
+	return wg
+}

vendor/github.com/go-micro/plugins/v4/server/http/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/server/http/README.md

@@ -0,0 +1,65 @@
+# HTTP Server
+
+The HTTP Server is a go-micro.Server. It's a partial implementation which strips out codecs, transports, etc but enables you 
+to create a HTTP Server that could potentially be used for REST based API services.
+
+## Usage
+
+```go
+import (
+	"net/http"
+
+	"github.com/micro/go-micro/server"
+	httpServer "github.com/go-micro/plugins/v4/server/http"
+)
+
+func main() {
+	srv := httpServer.NewServer(
+		server.Name("helloworld"),
+	)
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(`hello world`))
+	})
+
+	hd := srv.NewHandler(mux)
+
+	srv.Handle(hd)
+	srv.Start()
+	srv.Register()
+}
+```
+
+Or as part of a service
+
+```go
+import (
+	"net/http"
+
+	"go-micro.dev/v4"
+	"github.com/micro/go-micro/server"
+	httpServer "github.com/go-micro/plugins/v4/server/http"
+)
+
+func main() {
+	srv := httpServer.NewServer(
+		server.Name("helloworld"),
+	)
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(`hello world`))
+	})
+
+	hd := srv.NewHandler(mux)
+
+	srv.Handle(hd)
+
+	service := micro.NewService(
+		micro.Server(srv),
+	)
+	service.Init()
+	service.Run()
+}
+```

vendor/github.com/go-micro/plugins/v4/server/http/buffer.go

@@ -0,0 +1,14 @@
+package http
+
+import (
+	"bytes"
+)
+
+type buffer struct {
+	*bytes.Buffer
+}
+
+func (b *buffer) Close() error {
+	b.Buffer.Reset()
+	return nil
+}

vendor/github.com/go-micro/plugins/v4/server/http/context.go

@@ -0,0 +1,16 @@
+package http
+
+import (
+	"context"
+
+	"go-micro.dev/v4/server"
+)
+
+func setServerOption(k, v interface{}) server.Option {
+	return func(o *server.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, k, v)
+	}
+}

vendor/github.com/go-micro/plugins/v4/server/http/extractor.go

@@ -0,0 +1,165 @@
+package http
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+	"go-micro.dev/v4/util/addr"
+)
+
+func serviceDef(opts server.Options) *registry.Service {
+	var advt, host string
+	var port int
+
+	if len(opts.Advertise) > 0 {
+		advt = opts.Advertise
+	} else {
+		advt = opts.Address
+	}
+
+	parts := strings.Split(advt, ":")
+	if len(parts) > 1 {
+		host = strings.Join(parts[:len(parts)-1], ":")
+		port, _ = strconv.Atoi(parts[len(parts)-1])
+	} else {
+		host = parts[0]
+	}
+
+	addr, err := addr.Extract(host)
+	if err != nil {
+		addr = host
+	}
+
+	node := &registry.Node{
+		Id:       opts.Name + "-" + opts.Id,
+		Address:  net.JoinHostPort(addr, fmt.Sprint(port)),
+		Metadata: opts.Metadata,
+	}
+
+	node.Metadata["server"] = "http"
+	node.Metadata["broker"] = opts.Broker.String()
+	node.Metadata["registry"] = opts.Registry.String()
+	node.Metadata["protocol"] = "http"
+
+	return &registry.Service{
+		Name:    opts.Name,
+		Version: opts.Version,
+		Nodes:   []*registry.Node{node},
+	}
+}
+
+func extractValue(v reflect.Type, d int) *registry.Value {
+	if d == 3 {
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+
+	if v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	arg := &registry.Value{
+		Name: v.Name(),
+		Type: v.Name(),
+	}
+
+	switch v.Kind() {
+	case reflect.Struct:
+		for i := 0; i < v.NumField(); i++ {
+			f := v.Field(i)
+			if f.PkgPath != "" {
+				continue
+			}
+			val := extractValue(f.Type, d+1)
+			if val == nil {
+				continue
+			}
+
+			// if we can find a json tag use it
+			if tags := f.Tag.Get("json"); len(tags) > 0 {
+				parts := strings.Split(tags, ",")
+				val.Name = parts[0]
+			}
+
+			// if there's no name default it
+			if len(val.Name) == 0 {
+				val.Name = v.Field(i).Name
+			}
+
+			arg.Values = append(arg.Values, val)
+		}
+	case reflect.Slice:
+		p := v.Elem()
+		if p.Kind() == reflect.Ptr {
+			p = p.Elem()
+		}
+		arg.Type = "[]" + p.Name()
+		val := extractValue(v.Elem(), d+1)
+		if val != nil {
+			arg.Values = append(arg.Values, val)
+		}
+	}
+
+	return arg
+}
+
+func extractEndpoint(method reflect.Method) *registry.Endpoint {
+	if method.PkgPath != "" {
+		return nil
+	}
+
+	var rspType, reqType reflect.Type
+	var stream bool
+	mt := method.Type
+
+	switch mt.NumIn() {
+	case 3:
+		reqType = mt.In(1)
+		rspType = mt.In(2)
+	case 4:
+		reqType = mt.In(2)
+		rspType = mt.In(3)
+	default:
+		return nil
+	}
+
+	// are we dealing with a stream?
+	switch rspType.Kind() {
+	case reflect.Func, reflect.Interface:
+		stream = true
+	}
+
+	request := extractValue(reqType, 0)
+	response := extractValue(rspType, 0)
+
+	return &registry.Endpoint{
+		Name:     method.Name,
+		Request:  request,
+		Response: response,
+		Metadata: map[string]string{
+			"stream": fmt.Sprintf("%v", stream),
+		},
+	}
+}
+
+func extractSubValue(typ reflect.Type) *registry.Value {
+	var reqType reflect.Type
+	switch typ.NumIn() {
+	case 1:
+		reqType = typ.In(0)
+	case 2:
+		reqType = typ.In(1)
+	case 3:
+		reqType = typ.In(2)
+	default:
+		return nil
+	}
+	return extractValue(reqType, 0)
+}

vendor/github.com/go-micro/plugins/v4/server/http/handler.go

@@ -0,0 +1,28 @@
+package http
+
+import (
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+type httpHandler struct {
+	opts server.HandlerOptions
+	eps  []*registry.Endpoint
+	hd   interface{}
+}
+
+func (h *httpHandler) Name() string {
+	return "handler"
+}
+
+func (h *httpHandler) Handler() interface{} {
+	return h.hd
+}
+
+func (h *httpHandler) Endpoints() []*registry.Endpoint {
+	return h.eps
+}
+
+func (h *httpHandler) Options() server.HandlerOptions {
+	return h.opts
+}

vendor/github.com/go-micro/plugins/v4/server/http/http.go

@@ -0,0 +1,364 @@
+// Package http implements a go-micro.Server
+package http
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"sort"
+	"sync"
+	"time"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/codec/jsonrpc"
+	"go-micro.dev/v4/codec/protorpc"
+	log "go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+	"go-micro.dev/v4/util/cmd"
+)
+
+var (
+	defaultCodecs = map[string]codec.NewCodec{
+		"application/json":         jsonrpc.NewCodec,
+		"application/json-rpc":     jsonrpc.NewCodec,
+		"application/protobuf":     protorpc.NewCodec,
+		"application/proto-rpc":    protorpc.NewCodec,
+		"application/octet-stream": protorpc.NewCodec,
+	}
+)
+
+type httpServer struct {
+	sync.Mutex
+	opts         server.Options
+	hd           server.Handler
+	exit         chan chan error
+	registerOnce sync.Once
+	subscribers  map[*httpSubscriber][]broker.Subscriber
+	// used for first registration
+	registered bool
+}
+
+func init() {
+	cmd.DefaultServers["http"] = NewServer
+}
+
+func (h *httpServer) newCodec(contentType string) (codec.NewCodec, error) {
+	if cf, ok := h.opts.Codecs[contentType]; ok {
+		return cf, nil
+	}
+	if cf, ok := defaultCodecs[contentType]; ok {
+		return cf, nil
+	}
+	return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
+}
+
+func (h *httpServer) getListener() net.Listener {
+	if h.opts.Context == nil {
+		return nil
+	}
+
+	if l, ok := h.opts.Context.Value(netListener{}).(net.Listener); ok && l != nil {
+		return l
+	}
+
+	return nil
+}
+
+func (h *httpServer) Options() server.Options {
+	h.Lock()
+	opts := h.opts
+	h.Unlock()
+	return opts
+}
+
+func (h *httpServer) Init(opts ...server.Option) error {
+	h.Lock()
+	for _, o := range opts {
+		o(&h.opts)
+	}
+	h.Unlock()
+	return nil
+}
+
+func (h *httpServer) Handle(handler server.Handler) error {
+	if _, ok := handler.Handler().(http.Handler); !ok {
+		return errors.New("Handle requires http.Handler")
+	}
+	h.Lock()
+	h.hd = handler
+	h.Unlock()
+	return nil
+}
+
+func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+	options := server.HandlerOptions{
+		Metadata: make(map[string]map[string]string),
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	var eps []*registry.Endpoint
+
+	if !options.Internal {
+		for name, metadata := range options.Metadata {
+			eps = append(eps, &registry.Endpoint{
+				Name:     name,
+				Metadata: metadata,
+			})
+		}
+	}
+
+	return &httpHandler{
+		eps:  eps,
+		hd:   handler,
+		opts: options,
+	}
+}
+
+func (h *httpServer) NewSubscriber(topic string, handler interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	return newSubscriber(topic, handler, opts...)
+}
+
+func (h *httpServer) Subscribe(sb server.Subscriber) error {
+	sub, ok := sb.(*httpSubscriber)
+	if !ok {
+		return fmt.Errorf("invalid subscriber: expected *httpSubscriber")
+	}
+	if len(sub.handlers) == 0 {
+		return fmt.Errorf("invalid subscriber: no handler functions")
+	}
+
+	if err := validateSubscriber(sb); err != nil {
+		return err
+	}
+
+	h.Lock()
+	defer h.Unlock()
+	_, ok = h.subscribers[sub]
+	if ok {
+		return fmt.Errorf("subscriber %v already exists", h)
+	}
+	h.subscribers[sub] = nil
+	return nil
+}
+
+func (h *httpServer) Register() error {
+	h.Lock()
+	opts := h.opts
+	eps := h.hd.Endpoints()
+	h.Unlock()
+
+	service := serviceDef(opts)
+	service.Endpoints = eps
+
+	h.Lock()
+	var subscriberList []*httpSubscriber
+	for e := range h.subscribers {
+		// Only advertise non internal subscribers
+		if !e.Options().Internal {
+			subscriberList = append(subscriberList, e)
+		}
+	}
+	sort.Slice(subscriberList, func(i, j int) bool {
+		return subscriberList[i].topic > subscriberList[j].topic
+	})
+	for _, e := range subscriberList {
+		service.Endpoints = append(service.Endpoints, e.Endpoints()...)
+	}
+	h.Unlock()
+
+	rOpts := []registry.RegisterOption{
+		registry.RegisterTTL(opts.RegisterTTL),
+	}
+
+	h.registerOnce.Do(func() {
+		log.Infof("Registering node: %s", opts.Name+"-"+opts.Id)
+	})
+
+	if err := opts.Registry.Register(service, rOpts...); err != nil {
+		return err
+	}
+
+	h.Lock()
+	defer h.Unlock()
+
+	if h.registered {
+		return nil
+	}
+	h.registered = true
+
+	for sb := range h.subscribers {
+		handler := h.createSubHandler(sb, opts)
+		var subOpts []broker.SubscribeOption
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			subOpts = append(subOpts, broker.Queue(queue))
+		}
+
+		if cx := sb.Options().Context; cx != nil {
+			subOpts = append(subOpts, broker.SubscribeContext(cx))
+		}
+
+		if !sb.Options().AutoAck {
+			subOpts = append(subOpts, broker.DisableAutoAck())
+		}
+
+		sub, err := opts.Broker.Subscribe(sb.Topic(), handler, subOpts...)
+		if err != nil {
+			return err
+		}
+		h.subscribers[sb] = []broker.Subscriber{sub}
+	}
+	return nil
+}
+
+func (h *httpServer) Deregister() error {
+	h.Lock()
+	opts := h.opts
+	h.Unlock()
+
+	log.Infof("Deregistering node: %s", opts.Name+"-"+opts.Id)
+
+	service := serviceDef(opts)
+	if err := opts.Registry.Deregister(service); err != nil {
+		return err
+	}
+
+	h.Lock()
+
+	if !h.registered {
+		h.Unlock()
+		return nil
+	}
+	h.registered = false
+
+	wg := sync.WaitGroup{}
+	for sb, subs := range h.subscribers {
+		for _, sub := range subs {
+			wg.Add(1)
+			go func(s broker.Subscriber) {
+				defer wg.Done()
+				log.Infof("Unsubscribing from topic: %s", s.Topic())
+				s.Unsubscribe()
+			}(sub)
+		}
+		h.subscribers[sb] = nil
+	}
+
+	wg.Wait()
+	h.Unlock()
+	return nil
+}
+
+func (h *httpServer) Start() error {
+	h.Lock()
+	opts := h.opts
+	hd := h.hd
+	h.Unlock()
+
+	var (
+		ln  net.Listener
+		err error
+	)
+
+	if l := h.getListener(); l != nil {
+		ln = l
+	} else if opts.TLSConfig != nil {
+		ln, err = tls.Listen("tcp", opts.Address, opts.TLSConfig)
+	} else {
+		ln, err = net.Listen("tcp", opts.Address)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	log.Infof("Listening on %s", ln.Addr().String())
+
+	h.Lock()
+	h.opts.Address = ln.Addr().String()
+	h.Unlock()
+
+	handler, ok := hd.Handler().(http.Handler)
+	if !ok {
+		return errors.New("Server required http.Handler")
+	}
+
+	if err = opts.Broker.Connect(); err != nil {
+		return err
+	}
+
+	// register
+	if err = h.Register(); err != nil {
+		return err
+	}
+
+	go http.Serve(ln, handler)
+
+	go func() {
+		t := new(time.Ticker)
+
+		// only process if it exists
+		if opts.RegisterInterval > time.Duration(0) {
+			// new ticker
+			t = time.NewTicker(opts.RegisterInterval)
+		}
+
+		// return error chan
+		var ch chan error
+
+	Loop:
+		for {
+			select {
+			// register self on interval
+			case <-t.C:
+				if err := h.Register(); err != nil {
+					log.Error("Server register error: ", err)
+				}
+			// wait for exit
+			case ch = <-h.exit:
+				break Loop
+			}
+		}
+
+		// deregister
+		h.Deregister()
+
+		opts.Broker.Disconnect()
+
+		// Solve the problem of early exit
+		ch <- ln.Close()
+	}()
+
+	return nil
+}
+
+func (h *httpServer) Stop() error {
+	ch := make(chan error)
+	h.exit <- ch
+	return <-ch
+}
+
+func (h *httpServer) String() string {
+	if h.opts.TLSConfig != nil {
+		return "https"
+	}
+	return "http"
+}
+
+func newServer(opts ...server.Option) server.Server {
+	return &httpServer{
+		opts:        newOptions(opts...),
+		exit:        make(chan chan error),
+		subscribers: make(map[*httpSubscriber][]broker.Subscriber),
+	}
+}
+
+func NewServer(opts ...server.Option) server.Server {
+	return newServer(opts...)
+}

vendor/github.com/go-micro/plugins/v4/server/http/message.go

@@ -0,0 +1,36 @@
+package http
+
+import "go-micro.dev/v4/codec"
+
+type httpMessage struct {
+	topic       string
+	payload     interface{}
+	contentType string
+	header      map[string]string
+	body        []byte
+	codec       codec.Reader
+}
+
+func (r *httpMessage) Topic() string {
+	return r.topic
+}
+
+func (r *httpMessage) Payload() interface{} {
+	return r.payload
+}
+
+func (r *httpMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *httpMessage) Header() map[string]string {
+	return r.header
+}
+
+func (r *httpMessage) Body() []byte {
+	return r.body
+}
+
+func (r *httpMessage) Codec() codec.Reader {
+	return r.codec
+}

vendor/github.com/go-micro/plugins/v4/server/http/options.go

@@ -0,0 +1,56 @@
+package http
+
+import (
+	"context"
+	"net"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+type netListener struct{}
+
+func newOptions(opt ...server.Option) server.Options {
+	opts := server.Options{
+		Codecs:   make(map[string]codec.NewCodec),
+		Metadata: map[string]string{},
+		Context:  context.Background(),
+	}
+
+	for _, o := range opt {
+		o(&opts)
+	}
+
+	if opts.Broker == nil {
+		opts.Broker = broker.DefaultBroker
+	}
+
+	if opts.Registry == nil {
+		opts.Registry = registry.DefaultRegistry
+	}
+
+	if len(opts.Address) == 0 {
+		opts.Address = server.DefaultAddress
+	}
+
+	if len(opts.Name) == 0 {
+		opts.Name = server.DefaultName
+	}
+
+	if len(opts.Id) == 0 {
+		opts.Id = server.DefaultId
+	}
+
+	if len(opts.Version) == 0 {
+		opts.Version = server.DefaultVersion
+	}
+
+	return opts
+}
+
+// Listener specifies the net.Listener to use instead of the default.
+func Listener(l net.Listener) server.Option {
+	return setServerOption(netListener{}, l)
+}

vendor/github.com/go-micro/plugins/v4/server/http/subscriber.go

@@ -0,0 +1,298 @@
+package http
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"reflect"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"go-micro.dev/v4/broker"
+	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/metadata"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+const (
+	subSig = "func(context.Context, interface{}) error"
+)
+
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
+
+type handler struct {
+	method  reflect.Value
+	reqType reflect.Type
+	ctxType reflect.Type
+}
+
+type httpSubscriber struct {
+	topic      string
+	rcvr       reflect.Value
+	typ        reflect.Type
+	subscriber interface{}
+	handlers   []*handler
+	endpoints  []*registry.Endpoint
+	opts       server.SubscriberOptions
+}
+
+// Is this an exported - upper case - name?
+func isExported(name string) bool {
+	rune, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(rune)
+}
+
+// Is this type exported or a builtin?
+func isExportedOrBuiltinType(t reflect.Type) bool {
+	for t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+	// PkgPath will be non-empty even for an exported type,
+	// so we need to check the type name as well.
+	return isExported(t.Name()) || t.PkgPath() == ""
+}
+
+func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	options := server.SubscriberOptions{
+		AutoAck: true,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	var endpoints []*registry.Endpoint
+	var handlers []*handler
+
+	if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
+		h := &handler{
+			method: reflect.ValueOf(sub),
+		}
+
+		switch typ.NumIn() {
+		case 1:
+			h.reqType = typ.In(0)
+		case 2:
+			h.ctxType = typ.In(0)
+			h.reqType = typ.In(1)
+		}
+
+		handlers = append(handlers, h)
+
+		endpoints = append(endpoints, &registry.Endpoint{
+			Name:    "Func",
+			Request: extractSubValue(typ),
+			Metadata: map[string]string{
+				"topic":      topic,
+				"subscriber": "true",
+			},
+		})
+	} else {
+		hdlr := reflect.ValueOf(sub)
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+			h := &handler{
+				method: method.Func,
+			}
+
+			switch method.Type.NumIn() {
+			case 2:
+				h.reqType = method.Type.In(1)
+			case 3:
+				h.ctxType = method.Type.In(1)
+				h.reqType = method.Type.In(2)
+			}
+
+			handlers = append(handlers, h)
+
+			endpoints = append(endpoints, &registry.Endpoint{
+				Name:    name + "." + method.Name,
+				Request: extractSubValue(method.Type),
+				Metadata: map[string]string{
+					"topic":      topic,
+					"subscriber": "true",
+				},
+			})
+		}
+	}
+
+	return &httpSubscriber{
+		rcvr:       reflect.ValueOf(sub),
+		typ:        reflect.TypeOf(sub),
+		topic:      topic,
+		subscriber: sub,
+		handlers:   handlers,
+		endpoints:  endpoints,
+		opts:       options,
+	}
+}
+
+func validateSubscriber(sub server.Subscriber) error {
+	typ := reflect.TypeOf(sub.Subscriber())
+	var argType reflect.Type
+
+	if typ.Kind() == reflect.Func {
+		name := "Func"
+		switch typ.NumIn() {
+		case 2:
+			argType = typ.In(1)
+		default:
+			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
+		}
+		if !isExportedOrBuiltinType(argType) {
+			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
+		}
+		if typ.NumOut() != 1 {
+			return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
+				name, typ.NumOut(), subSig)
+		}
+		if returnType := typ.Out(0); returnType != typeOfError {
+			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
+		}
+	} else {
+		hdlr := reflect.ValueOf(sub.Subscriber())
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+
+			switch method.Type.NumIn() {
+			case 3:
+				argType = method.Type.In(2)
+			default:
+				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
+					name, method.Name, method.Type.NumIn(), subSig)
+			}
+
+			if !isExportedOrBuiltinType(argType) {
+				return fmt.Errorf("%v argument type not exported: %v", name, argType)
+			}
+			if method.Type.NumOut() != 1 {
+				return fmt.Errorf(
+					"subscriber %v.%v has wrong number of outs: %v require signature %s",
+					name, method.Name, method.Type.NumOut(), subSig)
+			}
+			if returnType := method.Type.Out(0); returnType != typeOfError {
+				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
+			}
+		}
+	}
+
+	return nil
+}
+
+func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) broker.Handler {
+	return func(p broker.Event) error {
+		msg := p.Message()
+		ct := msg.Header["Content-Type"]
+		cf, err := s.newCodec(ct)
+		if err != nil {
+			return err
+		}
+
+		hdr := make(map[string]string)
+		for k, v := range msg.Header {
+			hdr[k] = v
+		}
+		delete(hdr, "Content-Type")
+		ctx := metadata.NewContext(context.Background(), hdr)
+
+		results := make(chan error, len(sb.handlers))
+
+		for i := 0; i < len(sb.handlers); i++ {
+			handler := sb.handlers[i]
+
+			var isVal bool
+			var req reflect.Value
+
+			if handler.reqType.Kind() == reflect.Ptr {
+				req = reflect.New(handler.reqType.Elem())
+			} else {
+				req = reflect.New(handler.reqType)
+				isVal = true
+			}
+			if isVal {
+				req = req.Elem()
+			}
+
+			b := &buffer{bytes.NewBuffer(msg.Body)}
+			co := cf(b)
+			defer co.Close()
+
+			if err := co.ReadHeader(&codec.Message{}, codec.Event); err != nil {
+				return err
+			}
+
+			if err := co.ReadBody(req.Interface()); err != nil {
+				return err
+			}
+
+			fn := func(ctx context.Context, msg server.Message) error {
+				var vals []reflect.Value
+				if sb.typ.Kind() != reflect.Func {
+					vals = append(vals, sb.rcvr)
+				}
+				if handler.ctxType != nil {
+					vals = append(vals, reflect.ValueOf(ctx))
+				}
+
+				vals = append(vals, reflect.ValueOf(msg.Payload()))
+
+				returnValues := handler.method.Call(vals)
+				if err := returnValues[0].Interface(); err != nil {
+					return err.(error)
+				}
+				return nil
+			}
+
+			for i := len(opts.SubWrappers); i > 0; i-- {
+				fn = opts.SubWrappers[i-1](fn)
+			}
+
+			go func() {
+				results <- fn(ctx, &httpMessage{
+					topic:       sb.topic,
+					contentType: ct,
+					payload:     req.Interface(),
+					header:      msg.Header,
+					body:        msg.Body,
+					codec:       co,
+				})
+			}()
+		}
+
+		var errors []string
+
+		for i := 0; i < len(sb.handlers); i++ {
+			if err := <-results; err != nil {
+				errors = append(errors, err.Error())
+			}
+		}
+
+		if len(errors) > 0 {
+			return fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
+		}
+
+		return nil
+	}
+}
+
+func (s *httpSubscriber) Topic() string {
+	return s.topic
+}
+
+func (s *httpSubscriber) Subscriber() interface{} {
+	return s.subscriber
+}
+
+func (s *httpSubscriber) Endpoints() []*registry.Endpoint {
+	return s.endpoints
+}
+
+func (s *httpSubscriber) Options() server.SubscriberOptions {
+	return s.opts
+}

vendor/github.com/go-micro/plugins/v4/store/nats-js/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/store/nats-js/README.md

@@ -0,0 +1,79 @@
+# NATS JetStream Store Plugin
+
+> **WARNING**: NATS Object Storage is still marked as an experimental preview.
+
+This plugin uses the NATS JetStream [Object Store](https://docs.nats.io/nats-concepts/jetstream/obj_store) to implement the Go-Micro store interface.
+
+This enables a key/value store with unlimited message size, allowing you to store files or data of any size under a single key.
+
+You can use this plugin like any other store plugin. 
+To start a local NATS JetStream server run `nats-server -js`.
+
+To manually create a new storage object call:
+
+```go
+natsjs.NewStore(opts ...store.Option)
+```
+
+The Go-Micro store interface uses databases and tables to store keys. These translate
+to buckets (object stores) and key prefixes. If no database (bucket name) is provided, "default" will be used.
+
+You can call `Write` with any arbitrary database name, and if a bucket with that name does not exist yet,
+it will be automatically created.
+
+If a table name is provided, it will use it to prefix the key as `<table>_<key>`.
+
+To delete a bucket, and all the key/value pairs in it, pass the `DeleteBucket` option to the `Delete`
+method, then they key name will be interpreted as a bucket name, and the bucket will be deleted.
+
+Next to the default store options, a few NATS specific options are available:
+
+
+```go
+// NatsOptions accepts nats.Options
+NatsOptions(opts nats.Options)
+
+// JetStreamOptions accepts multiple nats.JSOpt
+JetStreamOptions(opts ...nats.JSOpt)
+
+// ObjectStoreOptions accepts multiple nats.ObjectStoreConfigs
+// This will create buckets with the provided configs at initialization.
+//
+// type ObjectStoreConfig struct {
+// 	Bucket      string
+// 	Description string
+// 	TTL         time.Duration
+// 	MaxBytes    int64
+// 	Storage     StorageType (either memory or file storage)
+// 	Replicas    int
+// 	Placement   *Placement
+// }
+//
+ObjectStoreOptions(cfg ...*nats.ObjectStoreConfig)
+
+// DefaultTTL sets the default TTL to use for new buckets
+//  By default no TTL is set.
+//
+// TTL ON INDIVIDUAL WRITE CALLS IS NOT SUPPORTED, only bucket wide TTL.
+// Either set a default TTL with this option or provide bucket specific options
+//  with ObjectStoreOptions
+DefaultTTL(ttl time.Duration)
+
+// DefaultMemory sets the default storage type to memory only.
+//
+//  The default is file storage, persisting storage between service restarts.
+// Be aware that the default storage location of NATS the /tmp dir is, and thus
+//  won't persist reboots.
+DefaultMemory()
+
+// DefaultDescription sets the default description to use when creating new
+//  buckets. The default is "Store managed by go-micro"
+DefaultDescription(text string)
+
+// DeleteBucket will use the key passed to Delete as a bucket (database) name,
+//  and delete the bucket.
+// This option should not be combined with the store.DeleteFrom option, as
+//  that will overwrite the delete action.
+DeleteBucket()
+```
+

vendor/github.com/go-micro/plugins/v4/store/nats-js/context.go

@@ -0,0 +1,17 @@
+package natsjs
+
+import (
+	"context"
+
+	"go-micro.dev/v4/store"
+)
+
+// setStoreOption returns a function to setup a context with given value.
+func setStoreOption(k, v interface{}) store.Option {
+	return func(o *store.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, k, v)
+	}
+}

vendor/github.com/go-micro/plugins/v4/store/nats-js/nats.go

@@ -0,0 +1,437 @@
+package natsjs
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/nats-io/nats.go"
+	"github.com/pkg/errors"
+	"go-micro.dev/v4/store"
+	"go-micro.dev/v4/util/cmd"
+)
+
+var (
+	ErrBucketNotFound = errors.New("Bucket (database) not found")
+)
+
+type natsStore struct {
+	sync.Once
+	sync.RWMutex
+
+	ttl         time.Duration
+	storageType nats.StorageType
+	description string
+
+	opts            store.Options
+	nopts           nats.Options
+	jsopts          []nats.JSOpt
+	objStoreConfigs []*nats.ObjectStoreConfig
+
+	conn    *nats.Conn
+	js      nats.JetStreamContext
+	buckets map[string]nats.ObjectStore
+}
+
+func init() {
+	cmd.DefaultStores["natsjs"] = NewStore
+}
+
+// NewStore will create a new NATS JetStream Object Store.
+func NewStore(opts ...store.Option) store.Store {
+	options := store.Options{
+		Nodes:    []string{},
+		Database: "default",
+		Table:    "",
+		Context:  context.Background(),
+	}
+
+	n := &natsStore{
+		description:     "Object storage administered by go-micro store plugin",
+		opts:            options,
+		jsopts:          []nats.JSOpt{},
+		objStoreConfigs: []*nats.ObjectStoreConfig{},
+		buckets:         map[string]nats.ObjectStore{},
+		storageType:     nats.FileStorage,
+	}
+
+	n.setOption(opts...)
+
+	return n
+}
+
+// Init initializes the store. It must perform any required setup on the
+// backing storage implementation and check that it is ready for use,
+// returning any errors.
+func (n *natsStore) Init(opts ...store.Option) error {
+	n.setOption(opts...)
+
+	// Connect to NATS servers
+	conn, err := n.nopts.Connect()
+	if err != nil {
+		return errors.Wrap(err, "Failed to connect to NATS Server")
+	}
+	n.conn = conn
+
+	// Create JetStream context
+	js, err := conn.JetStream(n.jsopts...)
+	if err != nil {
+		return errors.Wrap(err, "Failed to create JetStream context")
+	}
+	n.js = js
+
+	// Create default config if no configs present
+	if len(n.objStoreConfigs) == 0 {
+		n.objStoreConfigs = append(n.objStoreConfigs, &nats.ObjectStoreConfig{
+			Bucket:      n.opts.Database,
+			Description: n.description,
+			TTL:         n.ttl,
+			Storage:     n.storageType,
+		})
+	}
+
+	// Create objest store buckets
+	for _, cfg := range n.objStoreConfigs {
+		store, err := js.CreateObjectStore(cfg)
+		if err == nats.ErrStreamNameAlreadyInUse {
+			store, err = n.js.ObjectStore(cfg.Bucket)
+		}
+		if err != nil {
+			return errors.Wrapf(err, "Failed to create bucket (%s)", cfg.Bucket)
+		}
+		n.buckets[cfg.Bucket] = store
+	}
+
+	return nil
+}
+
+func (n *natsStore) setOption(opts ...store.Option) {
+	for _, o := range opts {
+		o(&n.opts)
+	}
+
+	n.Once.Do(func() {
+		n.nopts = nats.GetDefaultOptions()
+	})
+
+	// Extract options from context
+	if nopts, ok := n.opts.Context.Value(natsOptionsKey{}).(nats.Options); ok {
+		n.nopts = nopts
+	}
+
+	if jsopts, ok := n.opts.Context.Value(jsOptionsKey{}).([]nats.JSOpt); ok {
+		n.jsopts = append(n.jsopts, jsopts...)
+	}
+
+	if cfg, ok := n.opts.Context.Value(objOptionsKey{}).([]*nats.ObjectStoreConfig); ok {
+		n.objStoreConfigs = append(n.objStoreConfigs, cfg...)
+	}
+
+	if ttl, ok := n.opts.Context.Value(ttlOptionsKey{}).(time.Duration); ok {
+		n.ttl = ttl
+	}
+
+	if sType, ok := n.opts.Context.Value(memoryOptionsKey{}).(nats.StorageType); ok {
+		n.storageType = sType
+	}
+
+	if text, ok := n.opts.Context.Value(descriptionOptionsKey{}).(string); ok {
+		n.description = text
+	}
+
+	// Assign store option server addresses to nats options
+	if len(n.opts.Nodes) > 0 {
+		n.nopts.Url = ""
+		n.nopts.Servers = n.opts.Nodes
+	}
+
+	if len(n.nopts.Servers) == 0 && n.nopts.Url == "" {
+		n.nopts.Url = nats.DefaultURL
+	}
+}
+
+// Options allows you to view the current options.
+func (n *natsStore) Options() store.Options {
+	return n.opts
+}
+
+// Read takes a single key name and optional ReadOptions. It returns matching []*Record or an error.
+func (n *natsStore) Read(key string, opts ...store.ReadOption) ([]*store.Record, error) {
+	if n.conn == nil {
+		if err := n.Init(); err != nil {
+			return nil, err
+		}
+	}
+
+	opt := store.ReadOptions{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	if opt.Database == "" {
+		opt.Database = n.opts.Database
+	}
+	if opt.Table == "" {
+		opt.Table = n.opts.Table
+	}
+
+	bucket, ok := n.buckets[opt.Database]
+	if !ok {
+		return nil, ErrBucketNotFound
+	}
+
+	var keys []string
+	objects, err := bucket.List()
+	if err == nats.ErrNoObjectsFound {
+		return []*store.Record{}, nil
+	} else if err != nil {
+		return nil, errors.Wrap(err, "Failed to list objects")
+	}
+
+	for _, obj := range objects {
+		name := obj.Name
+		if (!opt.Prefix && !opt.Suffix) && getKey(key, opt.Table) != name {
+			continue
+		}
+		if opt.Prefix && !strings.HasPrefix(name, getKey(key, opt.Table)) {
+			continue
+		}
+
+		if opt.Suffix && !strings.HasSuffix(name, key) {
+			continue
+		}
+		keys = append(keys, name)
+	}
+
+	records := []*store.Record{}
+	for _, key := range keys {
+		obj, err := bucket.Get(key)
+		if err != nil {
+			return nil, errors.Wrap(err, "Failed to get object from bucket")
+		}
+
+		b, err := io.ReadAll(obj)
+		if err != nil {
+			return nil, errors.Wrap(err, "Failed to read returned bytes")
+		}
+
+		info, err := obj.Info()
+		if err != nil {
+			return nil, errors.Wrap(err, "Failed to fetch record info")
+		}
+
+		metadata := map[string]interface{}{}
+		for key, value := range info.Headers {
+			var val interface{}
+			if err := json.Unmarshal([]byte(value[0]), &val); err != nil {
+				return nil, errors.Wrap(err, "Failed to JSON unmarshal metadata")
+			}
+			metadata[key] = val
+		}
+
+		records = append(records, &store.Record{
+			Key:      key,
+			Value:    b,
+			Metadata: metadata,
+		})
+
+		// Why is there a close method?
+		obj.Close()
+	}
+
+	if opt.Limit > 0 {
+		return records[opt.Offset : opt.Offset+opt.Limit], nil
+	}
+	if opt.Offset > 0 {
+		return records[opt.Offset:], nil
+	}
+	return records, nil
+}
+
+// Write writes a record to the store, and returns an error if the record was not written.
+func (n *natsStore) Write(r *store.Record, opts ...store.WriteOption) error {
+	if n.conn == nil {
+		if err := n.Init(); err != nil {
+			return err
+		}
+	}
+
+	opt := store.WriteOptions{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	if opt.Database == "" {
+		opt.Database = n.opts.Database
+	}
+	if opt.Table == "" {
+		opt.Table = n.opts.Table
+	}
+
+	store, ok := n.buckets[opt.Database]
+
+	// Create new bucket if not exists
+	if !ok {
+		var err error
+		store, err = n.createNewBucket(opt.Database)
+		if err != nil {
+			return err
+		}
+	}
+
+	header := nats.Header{}
+	for key, value := range r.Metadata {
+		val, err := json.Marshal(value)
+		if err != nil {
+			return errors.Wrap(err, "Failed to JSON marshal metadata")
+		}
+		header.Set(key, string(val))
+	}
+
+	_, err := store.Put(&nats.ObjectMeta{
+		Name:        getKey(r.Key, opt.Table),
+		Description: "Store managed by go-micro",
+		Headers:     header,
+	}, bytes.NewReader(r.Value))
+
+	if err != nil {
+		return errors.Wrap(err, "Failed to store data in bucket")
+	}
+
+	return nil
+}
+
+// Delete removes the record with the corresponding key from the store.
+func (n *natsStore) Delete(key string, opts ...store.DeleteOption) error {
+	if n.conn == nil {
+		if err := n.Init(); err != nil {
+			return err
+		}
+	}
+
+	opt := store.DeleteOptions{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	if opt.Database == "" {
+		opt.Database = n.opts.Database
+	}
+	if opt.Table == "" {
+		opt.Table = n.opts.Table
+	}
+
+	if opt.Table == "DELETE_BUCKET" {
+		delete(n.buckets, key)
+		if err := n.js.DeleteObjectStore(key); err != nil {
+			return errors.Wrap(err, "Failed to delete bucket")
+		}
+		return nil
+	}
+
+	store, ok := n.buckets[opt.Database]
+	if !ok {
+		return ErrBucketNotFound
+	}
+
+	if err := store.Delete(getKey(key, opt.Table)); err != nil {
+		return errors.Wrap(err, "Failed to delete data")
+	}
+	return nil
+}
+
+// List returns any keys that match, or an empty list with no error if none matched.
+func (n *natsStore) List(opts ...store.ListOption) ([]string, error) {
+	if n.conn == nil {
+		if err := n.Init(); err != nil {
+			return nil, err
+		}
+	}
+
+	opt := store.ListOptions{}
+
+	for _, o := range opts {
+		o(&opt)
+	}
+
+	if opt.Database == "" {
+		opt.Database = n.opts.Database
+	}
+	if opt.Table == "" {
+		opt.Table = n.opts.Table
+	}
+
+	store, ok := n.buckets[opt.Database]
+	if !ok {
+		return nil, ErrBucketNotFound
+	}
+
+	objects, err := store.List()
+	if err != nil {
+		return nil, errors.Wrap(err, "Failed to list keys in bucket")
+	}
+
+	var keys []string
+	for _, obj := range objects {
+		key := obj.Name
+
+		if !strings.HasPrefix(key, getKey(opt.Prefix, opt.Table)) {
+			continue
+		}
+
+		if !strings.HasSuffix(key, opt.Suffix) {
+			continue
+		}
+		keys = append(keys, key)
+	}
+
+	if opt.Limit > 0 {
+		return keys[opt.Offset : opt.Offset+opt.Limit], nil
+	}
+	if opt.Offset > 0 {
+		return keys[opt.Offset:], nil
+	}
+	return keys, nil
+}
+
+// Close the store.
+func (n *natsStore) Close() error {
+	n.conn.Close()
+	return nil
+}
+
+// String returns the name of the implementation.
+func (n *natsStore) String() string {
+	return "NATS JetStream ObjectStore"
+}
+
+func getKey(key, table string) string {
+	if table != "" {
+		key = table + "_" + key
+	}
+	return key
+}
+
+func (n *natsStore) createNewBucket(name string) (nats.ObjectStore, error) {
+	store, err := n.js.CreateObjectStore(&nats.ObjectStoreConfig{
+		Bucket:      name,
+		Description: n.description,
+		TTL:         n.ttl,
+		Storage:     n.storageType,
+	})
+	if err == nats.ErrStreamNameAlreadyInUse {
+		store, err = n.js.ObjectStore(name)
+	}
+	if err != nil {
+		return nil, errors.Wrapf(err, "Failed to create new bucket (%s)", name)
+	}
+	n.buckets[name] = store
+	return store, err
+}

vendor/github.com/go-micro/plugins/v4/store/nats-js/options.go

@@ -0,0 +1,78 @@
+package natsjs
+
+import (
+	"time"
+
+	"github.com/nats-io/nats.go"
+	"go-micro.dev/v4/store"
+)
+
+// store.Option.
+type natsOptionsKey struct{}
+type jsOptionsKey struct{}
+type objOptionsKey struct{}
+type ttlOptionsKey struct{}
+type memoryOptionsKey struct{}
+type descriptionOptionsKey struct{}
+
+// store.DeleteOption.
+type delBucketOptionsKey struct{}
+
+// NatsOptions accepts nats.Options.
+func NatsOptions(opts nats.Options) store.Option {
+	return setStoreOption(natsOptionsKey{}, opts)
+}
+
+// JetStreamOptions accepts multiple nats.JSOpt.
+func JetStreamOptions(opts ...nats.JSOpt) store.Option {
+	return setStoreOption(jsOptionsKey{}, opts)
+}
+
+// ObjectStoreOptions accepts multiple nats.ObjectStoreConfigs
+// This will create buckets with the provided configs at initialization.
+func ObjectStoreOptions(cfg ...*nats.ObjectStoreConfig) store.Option {
+	return setStoreOption(objOptionsKey{}, cfg)
+}
+
+// DefaultTTL sets the default TTL to use for new buckets
+//
+//	By default no TTL is set.
+//
+// TTL ON INDIVIDUAL WRITE CALLS IS NOT SUPPORTED, only bucket wide TTL.
+// Either set a default TTL with this option or provide bucket specific options
+//
+//	with ObjectStoreOptions
+func DefaultTTL(ttl time.Duration) store.Option {
+	return setStoreOption(ttlOptionsKey{}, ttl)
+}
+
+// DefaultMemory sets the default storage type to memory only.
+//
+//	The default is file storage, persisting storage between service restarts.
+//
+// Be aware that the default storage location of NATS the /tmp dir is, and thus
+//
+//	won't persist reboots.
+func DefaultMemory() store.Option {
+	return setStoreOption(memoryOptionsKey{}, nats.MemoryStorage)
+}
+
+// DefaultDescription sets the default description to use when creating new
+//
+//	buckets. The default is "Store managed by go-micro"
+func DefaultDescription(text string) store.Option {
+	return setStoreOption(descriptionOptionsKey{}, text)
+}
+
+// DeleteBucket will use the key passed to Delete as a bucket (database) name,
+//
+//	and delete the bucket.
+//
+// This option should not be combined with the store.DeleteFrom option, as
+//
+//	that will overwrite the delete action.
+func DeleteBucket() store.DeleteOption {
+	return func(d *store.DeleteOptions) {
+		d.Table = "DELETE_BUCKET"
+	}
+}

vendor/github.com/go-micro/plugins/v4/store/nats-js/test_data.go

@@ -0,0 +1,132 @@
+package natsjs
+
+import "go-micro.dev/v4/store"
+
+type test struct {
+	Record   *store.Record
+	Database string
+	Table    string
+}
+
+var (
+	table = []test{
+		{
+			Record: &store.Record{
+				Key:   "One",
+				Value: []byte("First value"),
+			},
+		},
+		{
+			Record: &store.Record{
+				Key:   "Two",
+				Value: []byte("Second value"),
+			},
+			Table: "prefix_test",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Third",
+				Value: []byte("Third value"),
+			},
+			Database: "new-bucket",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Four",
+				Value: []byte("Fourth value"),
+			},
+			Database: "new-bucket",
+			Table:    "prefix_test",
+		},
+		{
+			Record: &store.Record{
+				Key:   "empty-value",
+				Value: []byte{},
+			},
+			Database: "new-bucket",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Alex",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "names",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Jones",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "names",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Adrianna",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "names",
+		},
+		{
+			Record: &store.Record{
+				Key:   "MexicoCity",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "cities",
+		},
+		{
+			Record: &store.Record{
+				Key:   "HoustonCity",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "cities",
+		},
+		{
+			Record: &store.Record{
+				Key:   "ZurichCity",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "cities",
+		},
+		{
+			Record: &store.Record{
+				Key:   "Helsinki",
+				Value: []byte("Some value"),
+			},
+			Database: "prefix-test",
+			Table:    "cities",
+		},
+		{
+			Record: &store.Record{
+				Key:   "testKeytest",
+				Value: []byte("Some value"),
+			},
+			Table: "some_table",
+		},
+		{
+			Record: &store.Record{
+				Key:   "testSecondtest",
+				Value: []byte("Some value"),
+			},
+			Table: "some_table",
+		},
+		{
+			Record: &store.Record{
+				Key:   "lalala",
+				Value: []byte("Some value"),
+			},
+			Table: "some_table",
+		},
+		{
+			Record: &store.Record{
+				Key:   "testAnothertest",
+				Value: []byte("Some value"),
+			},
+		},
+	}
+)

vendor/github.com/go-micro/plugins/v4/store/redis/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/store/redis/options.go

@@ -0,0 +1,48 @@
+package redis
+
+import (
+	"context"
+
+	"github.com/go-redis/redis/v8"
+	"go-micro.dev/v4/store"
+)
+
+type redisOptionsContextKey struct{}
+
+// WithRedisOptions sets advanced options for redis.
+func WithRedisOptions(options redis.UniversalOptions) store.Option {
+	return func(o *store.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+
+		o.Context = context.WithValue(o.Context, redisOptionsContextKey{}, options)
+	}
+}
+
+func newUniversalClient(o store.Options) redis.UniversalClient {
+	if o.Context == nil {
+		o.Context = context.Background()
+	}
+
+	opts, ok := o.Context.Value(redisOptionsContextKey{}).(redis.UniversalOptions)
+	if !ok && len(o.Nodes) <= 1 {
+		addr := "redis://127.0.0.1:6379"
+		if len(o.Nodes) > 0 {
+			addr = o.Nodes[0]
+		}
+
+		redisOptions, err := redis.ParseURL(addr)
+		if err != nil {
+			redisOptions = &redis.Options{Addr: addr}
+		}
+
+		return redis.NewClient(redisOptions)
+	}
+
+	if len(opts.Addrs) == 0 && len(o.Nodes) > 0 {
+		opts.Addrs = o.Nodes
+	}
+
+	return redis.NewUniversalClient(&opts)
+}

vendor/github.com/go-micro/plugins/v4/store/redis/redis.go

@@ -0,0 +1,164 @@
+package redis
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/go-redis/redis/v8"
+	log "go-micro.dev/v4/logger"
+	"go-micro.dev/v4/store"
+	"go-micro.dev/v4/util/cmd"
+)
+
+type rkv struct {
+	ctx     context.Context
+	options store.Options
+	Client  redis.UniversalClient
+}
+
+func init() {
+	cmd.DefaultStores["redis"] = NewStore
+}
+
+func (r *rkv) Init(opts ...store.Option) error {
+	for _, o := range opts {
+		o(&r.options)
+	}
+
+	return r.configure()
+}
+
+func (r *rkv) Close() error {
+	return r.Client.Close()
+}
+
+func (r *rkv) Read(key string, opts ...store.ReadOption) ([]*store.Record, error) {
+	options := store.ReadOptions{}
+	options.Table = r.options.Table
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	var keys []string
+
+	rkey := fmt.Sprintf("%s%s", options.Table, key)
+	// Handle Prefix
+	// TODO suffix
+	if options.Prefix {
+		prefixKey := fmt.Sprintf("%s*", rkey)
+		fkeys, err := r.Client.Keys(r.ctx, prefixKey).Result()
+		if err != nil {
+			return nil, err
+		}
+		// TODO Limit Offset
+
+		keys = append(keys, fkeys...)
+	} else {
+		keys = []string{rkey}
+	}
+
+	records := make([]*store.Record, 0, len(keys))
+
+	for _, rkey = range keys {
+		val, err := r.Client.Get(r.ctx, rkey).Bytes()
+
+		if err != nil && err == redis.Nil {
+			return nil, store.ErrNotFound
+		} else if err != nil {
+			return nil, err
+		}
+
+		if val == nil {
+			return nil, store.ErrNotFound
+		}
+
+		d, err := r.Client.TTL(r.ctx, rkey).Result()
+		if err != nil {
+			return nil, err
+		}
+
+		records = append(records, &store.Record{
+			Key:    key,
+			Value:  val,
+			Expiry: d,
+		})
+	}
+
+	return records, nil
+}
+
+func (r *rkv) Delete(key string, opts ...store.DeleteOption) error {
+	options := store.DeleteOptions{}
+	options.Table = r.options.Table
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	rkey := fmt.Sprintf("%s%s", options.Table, key)
+	return r.Client.Del(r.ctx, rkey).Err()
+}
+
+func (r *rkv) Write(record *store.Record, opts ...store.WriteOption) error {
+	options := store.WriteOptions{}
+	options.Table = r.options.Table
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	rkey := fmt.Sprintf("%s%s", options.Table, record.Key)
+	return r.Client.Set(r.ctx, rkey, record.Value, record.Expiry).Err()
+}
+
+func (r *rkv) List(opts ...store.ListOption) ([]string, error) {
+	options := store.ListOptions{}
+	options.Table = r.options.Table
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	keys, err := r.Client.Keys(r.ctx, "*").Result()
+	if err != nil {
+		return nil, err
+	}
+
+	return keys, nil
+}
+
+func (r *rkv) Options() store.Options {
+	return r.options
+}
+
+func (r *rkv) String() string {
+	return "redis"
+}
+
+func NewStore(opts ...store.Option) store.Store {
+	var options store.Options
+	for _, o := range opts {
+		o(&options)
+	}
+
+	s := &rkv{
+		ctx:     context.Background(),
+		options: options,
+	}
+
+	if err := s.configure(); err != nil {
+		log.Fatal(err)
+	}
+
+	return s
+}
+
+func (r *rkv) configure() error {
+	if r.Client != nil {
+		r.Client.Close()
+	}
+	r.Client = newUniversalClient(r.options)
+
+	return nil
+}

vendor/github.com/go-micro/plugins/v4/wrapper/breaker/gobreaker/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/wrapper/breaker/gobreaker/gobreaker.go

@@ -0,0 +1,93 @@
+package gobreaker
+
+import (
+	"context"
+	"sync"
+
+	"github.com/sony/gobreaker"
+	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/errors"
+)
+
+type BreakerMethod int
+
+const (
+	BreakService BreakerMethod = iota
+	BreakServiceEndpoint
+)
+
+type clientWrapper struct {
+	bs  gobreaker.Settings
+	bm  BreakerMethod
+	cbs map[string]*gobreaker.TwoStepCircuitBreaker
+	mu  sync.Mutex
+	client.Client
+}
+
+func (c *clientWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	var svc string
+
+	switch c.bm {
+	case BreakService:
+		svc = req.Service()
+	case BreakServiceEndpoint:
+		svc = req.Service() + "." + req.Endpoint()
+	}
+
+	c.mu.Lock()
+	cb, ok := c.cbs[svc]
+	if !ok {
+		cb = gobreaker.NewTwoStepCircuitBreaker(c.bs)
+		c.cbs[svc] = cb
+	}
+	c.mu.Unlock()
+
+	cbAllow, err := cb.Allow()
+	if err != nil {
+		return errors.New(req.Service(), err.Error(), 502)
+	}
+
+	if err = c.Client.Call(ctx, req, rsp, opts...); err == nil {
+		cbAllow(true)
+		return nil
+	}
+
+	merr := errors.Parse(err.Error())
+	switch {
+	case merr.Code == 0:
+		merr.Code = 503
+	case len(merr.Id) == 0:
+		merr.Id = req.Service()
+	}
+
+	if merr.Code >= 500 {
+		cbAllow(false)
+	} else {
+		cbAllow(true)
+	}
+
+	return merr
+}
+
+// NewClientWrapper returns a client Wrapper.
+func NewClientWrapper() client.Wrapper {
+	return func(c client.Client) client.Client {
+		w := &clientWrapper{}
+		w.bs = gobreaker.Settings{}
+		w.cbs = make(map[string]*gobreaker.TwoStepCircuitBreaker)
+		w.Client = c
+		return w
+	}
+}
+
+// NewCustomClientWrapper takes a gobreaker.Settings and BreakerMethod. Returns a client Wrapper.
+func NewCustomClientWrapper(bs gobreaker.Settings, bm BreakerMethod) client.Wrapper {
+	return func(c client.Client) client.Client {
+		w := &clientWrapper{}
+		w.bm = bm
+		w.bs = bs
+		w.cbs = make(map[string]*gobreaker.TwoStepCircuitBreaker)
+		w.Client = c
+		return w
+	}
+}

vendor/github.com/go-micro/plugins/v4/wrapper/monitoring/prometheus/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/wrapper/monitoring/prometheus/README.md

@@ -0,0 +1,24 @@
+# Prometheus 
+
+Wrappers are a form of middleware that can be used with go-micro services. They can wrap both the Client and Server handlers. 
+This plugin implements the HandlerWrapper interface to provide automatic prometheus metric handling
+for each microservice method execution time and operation count for success and failed cases.  
+
+This handler will export two metrics to prometheus:
+* **micro_request_total**. How many go-micro requests processed, partitioned by method and status.
+* **micro_request_duration_microseconds**. Service method request latencies in microseconds, partitioned by method.
+
+# Usage
+
+When creating your service, add the wrapper like so.
+
+```go
+    service := micro.NewService(
+        micro.Name("service name"),
+    	micro.Version("latest"),
+    	micro.WrapHandler(prometheus.NewHandlerWrapper()),
+    )
+    
+    service.Init()
+```
+

vendor/github.com/go-micro/plugins/v4/wrapper/monitoring/prometheus/prometheus.go

@@ -0,0 +1,294 @@
+package prometheus
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/logger"
+	"go-micro.dev/v4/registry"
+	"go-micro.dev/v4/server"
+)
+
+var (
+	// default metric prefix.
+	DefaultMetricPrefix = "micro_"
+	// default label prefix.
+	DefaultLabelPrefix = "micro_"
+
+	opsCounter           *prometheus.CounterVec
+	timeCounterSummary   *prometheus.SummaryVec
+	timeCounterHistogram *prometheus.HistogramVec
+)
+
+type Options struct {
+	Name    string
+	Version string
+	ID      string
+}
+
+type Option func(*Options)
+
+func ServiceName(name string) Option {
+	return func(opts *Options) {
+		opts.Name = name
+	}
+}
+
+func ServiceVersion(version string) Option {
+	return func(opts *Options) {
+		opts.Version = version
+	}
+}
+
+func ServiceID(id string) Option {
+	return func(opts *Options) {
+		opts.ID = id
+	}
+}
+
+func init() {
+	if opsCounter == nil {
+		opsCounter = prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Name: fmt.Sprintf("%srequest_total", DefaultMetricPrefix),
+				Help: "Requests processed, partitioned by endpoint and status",
+			},
+			[]string{
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "status"),
+			},
+		)
+	}
+
+	if timeCounterSummary == nil {
+		timeCounterSummary = prometheus.NewSummaryVec(
+			prometheus.SummaryOpts{
+				Name: fmt.Sprintf("%slatency_microseconds", DefaultMetricPrefix),
+				Help: "Request latencies in microseconds, partitioned by endpoint",
+			},
+			[]string{
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
+			},
+		)
+	}
+
+	if timeCounterHistogram == nil {
+		timeCounterHistogram = prometheus.NewHistogramVec(
+			prometheus.HistogramOpts{
+				Name: fmt.Sprintf("%srequest_duration_seconds", DefaultMetricPrefix),
+				Help: "Request time in seconds, partitioned by endpoint",
+			},
+			[]string{
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
+				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
+			},
+		)
+	}
+
+	for _, collector := range []prometheus.Collector{opsCounter, timeCounterSummary, timeCounterHistogram} {
+		if err := prometheus.DefaultRegisterer.Register(collector); err != nil {
+			// if already registered, skip fatal
+			if _, ok := err.(prometheus.AlreadyRegisteredError); !ok {
+				logger.Fatal(err)
+			}
+		}
+	}
+}
+
+type wrapper struct {
+	options  Options
+	callFunc client.CallFunc
+	client.Client
+}
+
+func NewClientWrapper(opts ...Option) client.Wrapper {
+	options := Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return func(c client.Client) client.Client {
+		handler := &wrapper{
+			options: options,
+			Client:  c,
+		}
+
+		return handler
+	}
+}
+
+func NewCallWrapper(opts ...Option) client.CallWrapper {
+	options := Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return func(fn client.CallFunc) client.CallFunc {
+		handler := &wrapper{
+			options:  options,
+			callFunc: fn,
+		}
+
+		return handler.CallFunc
+	}
+}
+
+func (w *wrapper) CallFunc(ctx context.Context, node *registry.Node, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+
+	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+		us := v * 1000000 // make microseconds
+		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+	}))
+	defer timer.ObserveDuration()
+
+	err := w.callFunc(ctx, node, req, rsp, opts)
+	if err == nil {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+	} else {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+	}
+
+	return err
+}
+
+func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+
+	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+		us := v * 1000000 // make microseconds
+		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+	}))
+	defer timer.ObserveDuration()
+
+	err := w.Client.Call(ctx, req, rsp, opts...)
+	if err == nil {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+	} else {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+	}
+
+	return err
+}
+
+func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+
+	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+		us := v * 1000000 // make microseconds
+		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+	}))
+	defer timer.ObserveDuration()
+
+	stream, err := w.Client.Stream(ctx, req, opts...)
+	if err == nil {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+	} else {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+	}
+
+	return stream, err
+}
+
+func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	endpoint := p.Topic()
+
+	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+		us := v * 1000000 // make microseconds
+		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+	}))
+	defer timer.ObserveDuration()
+
+	err := w.Client.Publish(ctx, p, opts...)
+	if err == nil {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+	} else {
+		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+	}
+
+	return err
+}
+
+func NewHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	options := Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	handler := &wrapper{
+		options: options,
+	}
+
+	return handler.HandlerFunc
+}
+
+func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc {
+	return func(ctx context.Context, req server.Request, rsp interface{}) error {
+		endpoint := req.Endpoint()
+
+		timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+			us := v * 1000000 // make microseconds
+			timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+			timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+		}))
+		defer timer.ObserveDuration()
+
+		err := fn(ctx, req, rsp)
+		if err == nil {
+			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+		} else {
+			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+		}
+
+		return err
+	}
+}
+
+func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	options := Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	handler := &wrapper{
+		options: options,
+	}
+
+	return handler.SubscriberFunc
+}
+
+func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc {
+	return func(ctx context.Context, msg server.Message) error {
+		endpoint := msg.Topic()
+
+		timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
+			us := v * 1000000 // make microseconds
+			timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
+			timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
+		}))
+		defer timer.ObserveDuration()
+
+		err := fn(ctx, msg)
+		if err == nil {
+			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
+		} else {
+			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+		}
+
+		return err
+	}
+}

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015 Asim Aslam.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/README.md

@@ -0,0 +1,31 @@
+# OpenCensus wrappers
+
+OpenCensus wrappers propagate traces (spans) accross services.
+
+## Usage
+
+```go
+service := micro.NewService(
+    micro.Name("go.micro.srv.greeter"),
+    micro.WrapClient(opencensus.NewClientWrapper()),
+    micro.WrapHandler(opencensus.NewHandlerWrapper()),
+    micro.WrapSubscriber(opencensus.NewSubscriberWrapper()),
+)
+```
+
+### Views
+
+The OpenCensus package exposes some convenience views.
+Don't forget to register these views:
+
+```go
+// Register to all RPC server views.
+if err := view.Register(opencensus.DefaultServerViews...); err != nil {
+    log.Fatal(err)
+}
+
+// Register to all RPC client views.
+if err := view.Register(opencensus.DefaultClientViews...); err != nil {
+    log.Fatal(err)
+}
+```

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/opencensus.go

@@ -0,0 +1,150 @@
+// Package opencensus provides wrappers for OpenCensus tracing.
+package opencensus
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+
+	"go-micro.dev/v4/client"
+	log "go-micro.dev/v4/logger"
+	"go-micro.dev/v4/metadata"
+	"go-micro.dev/v4/server"
+	"go.opencensus.io/trace"
+	"go.opencensus.io/trace/propagation"
+)
+
+const (
+	// TracePropagationField is the key for the tracing context
+	// that will be injected in go-micro's metadata.
+	TracePropagationField = "X-Trace-Context"
+)
+
+// clientWrapper wraps an RPC client and adds tracing.
+type clientWrapper struct {
+	client.Client
+}
+
+func injectTraceIntoCtx(ctx context.Context, span *trace.Span) context.Context {
+	spanCtx := propagation.Binary(span.SpanContext())
+	return metadata.Set(ctx, TracePropagationField, base64.RawStdEncoding.EncodeToString(spanCtx))
+}
+
+// Call implements client.Client.Call.
+func (w *clientWrapper) Call(
+	ctx context.Context,
+	req client.Request,
+	rsp interface{},
+	opts ...client.CallOption) (err error) {
+	t := newRequestTracker(req, ClientProfile)
+	ctx = t.start(ctx, true)
+
+	defer func() { t.end(ctx, err) }()
+
+	ctx = injectTraceIntoCtx(ctx, t.span)
+
+	err = w.Client.Call(ctx, req, rsp, opts...)
+	return
+}
+
+// Publish implements client.Client.Publish.
+func (w *clientWrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) (err error) {
+	t := newEventTracker(p, ClientProfile)
+	ctx = t.start(ctx, true)
+
+	defer func() { t.end(ctx, err) }()
+
+	ctx = injectTraceIntoCtx(ctx, t.span)
+
+	err = w.Client.Publish(ctx, p, opts...)
+	return
+}
+
+// NewClientWrapper returns a client.Wrapper
+// that adds monitoring to outgoing requests.
+func NewClientWrapper() client.Wrapper {
+	return func(c client.Client) client.Client {
+		return &clientWrapper{c}
+	}
+}
+
+func getTraceFromCtx(ctx context.Context) *trace.SpanContext {
+	encodedTraceCtx, ok := metadata.Get(ctx, TracePropagationField)
+	if !ok {
+		return nil
+	}
+
+	traceCtxBytes, err := base64.RawStdEncoding.DecodeString(encodedTraceCtx)
+	if err != nil {
+		log.Errorf("Could not decode trace context: %s", err.Error())
+		return nil
+	}
+
+	spanCtx, ok := propagation.FromBinary(traceCtxBytes)
+	if !ok {
+		log.Errorf("Could not decode trace context from binary")
+		return nil
+	}
+
+	return &spanCtx
+}
+
+// NewHandlerWrapper returns a server.HandlerWrapper
+// that adds tracing to incoming requests.
+func NewHandlerWrapper() server.HandlerWrapper {
+	return func(fn server.HandlerFunc) server.HandlerFunc {
+		return func(ctx context.Context, req server.Request, rsp interface{}) (err error) {
+			t := newRequestTracker(req, ServerProfile)
+			ctx = t.start(ctx, false)
+
+			defer func() { t.end(ctx, err) }()
+
+			spanCtx := getTraceFromCtx(ctx)
+			if spanCtx != nil {
+				ctx, t.span = trace.StartSpanWithRemoteParent(
+					ctx,
+					fmt.Sprintf("rpc/%s/%s/%s", ServerProfile.Role, req.Service(), req.Endpoint()),
+					*spanCtx,
+				)
+			} else {
+				ctx, t.span = trace.StartSpan(
+					ctx,
+					fmt.Sprintf("rpc/%s/%s/%s", ServerProfile.Role, req.Service(), req.Endpoint()),
+				)
+			}
+
+			err = fn(ctx, req, rsp)
+			return
+		}
+	}
+}
+
+// NewSubscriberWrapper returns a server.SubscriberWrapper
+// that adds tracing to subscription requests.
+func NewSubscriberWrapper() server.SubscriberWrapper {
+	return func(fn server.SubscriberFunc) server.SubscriberFunc {
+		return func(ctx context.Context, p server.Message) (err error) {
+			t := newEventTracker(p, ServerProfile)
+			ctx = t.start(ctx, false)
+
+			defer func() { t.end(ctx, err) }()
+
+			spanCtx := getTraceFromCtx(ctx)
+			if spanCtx != nil {
+				ctx, t.span = trace.StartSpanWithRemoteParent(
+					ctx,
+					fmt.Sprintf("rpc/%s/pubsub/%s", ServerProfile.Role, p.Topic()),
+					*spanCtx,
+				)
+			} else {
+				ctx, t.span = trace.StartSpan(
+					ctx,
+					fmt.Sprintf("rpc/%s/pubsub/%s", ServerProfile.Role, p.Topic()),
+				)
+			}
+
+			err = fn(ctx, p)
+			return
+		}
+	}
+}

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/stats.go

@@ -0,0 +1,142 @@
+package opencensus
+
+import (
+	"go.opencensus.io/stats"
+	"go.opencensus.io/stats/view"
+	"go.opencensus.io/tag"
+)
+
+// The following client RPC measures are supported for use in custom views.
+var (
+	ClientRequestCount = stats.Int64("opencensus.io/rpc/client/request_count", "Number of RPC requests started", stats.UnitNone)
+	ClientLatency      = stats.Float64("opencensus.io/rpc/client/latency", "End-to-end latency", stats.UnitMilliseconds)
+)
+
+// The following server RPC measures are supported for use in custom views.
+var (
+	ServerRequestCount = stats.Int64("opencensus.io/rpc/server/request_count", "Number of RPC requests received", stats.UnitNone)
+	ServerLatency      = stats.Float64("opencensus.io/rpc/server/latency", "End-to-end latency", stats.UnitMilliseconds)
+)
+
+// The following tags are applied to stats recorded by this package.
+// Service and Method are applied to all measures.
+// StatusCode is not applied to ClientRequestCount or ServerRequestCount,
+// since it is recorded before the status is known.
+var (
+	// StatusCode is the RPC status code.
+	StatusCode, _ = tag.NewKey("rpc.status")
+
+	// Service is the name of the micro-service.
+	Service, _ = tag.NewKey("rpc.service")
+
+	// Method is the service method called.
+	Endpoint, _ = tag.NewKey("rpc.endpoint")
+)
+
+// Default distributions used by views in this package.
+var (
+	DefaultLatencyDistribution = view.Distribution(0, 1, 2, 3, 4, 5, 6, 8, 10, 13, 16, 20, 25, 30, 40, 50, 65, 80, 100, 130, 160, 200, 250, 300, 400, 500, 650, 800, 1000, 2000, 5000, 10000, 20000, 50000, 100000)
+)
+
+// This package provides some convenience views.
+// You need to subscribe to the views for data to actually be collected.
+var (
+	ClientRequestCountView = &view.View{
+		Name:        "opencensus.io/rpc/client/request_count",
+		Description: "Count of RPC requests started",
+		Measure:     ClientRequestCount,
+		Aggregation: view.Count(),
+	}
+
+	ClientLatencyView = &view.View{
+		Name:        "opencensus.io/rpc/client/latency",
+		Description: "Latency distribution of RPC requests",
+		Measure:     ClientLatency,
+		Aggregation: DefaultLatencyDistribution,
+	}
+
+	ClientRequestCountByMethod = &view.View{
+		Name:        "opencensus.io/rpc/client/request_count_by_method",
+		Description: "Client request count by RPC method",
+		TagKeys:     []tag.Key{Endpoint},
+		Measure:     ClientRequestCount,
+		Aggregation: view.Count(),
+	}
+
+	ClientResponseCountByStatusCode = &view.View{
+		Name:        "opencensus.io/rpc/client/response_count_by_status_code",
+		Description: "Client response count by RPC status code",
+		TagKeys:     []tag.Key{StatusCode},
+		Measure:     ClientLatency,
+		Aggregation: view.Count(),
+	}
+
+	ServerRequestCountView = &view.View{
+		Name:        "opencensus.io/rpc/server/request_count",
+		Description: "Count of RPC requests received",
+		Measure:     ServerRequestCount,
+		Aggregation: view.Count(),
+	}
+
+	ServerLatencyView = &view.View{
+		Name:        "opencensus.io/rpc/server/latency",
+		Description: "Latency distribution of RPC requests",
+		Measure:     ServerLatency,
+		Aggregation: DefaultLatencyDistribution,
+	}
+
+	ServerRequestCountByMethod = &view.View{
+		Name:        "opencensus.io/rpc/server/request_count_by_method",
+		Description: "Server request count by RPC method",
+		TagKeys:     []tag.Key{Endpoint},
+		Measure:     ServerRequestCount,
+		Aggregation: view.Count(),
+	}
+
+	ServerResponseCountByStatusCode = &view.View{
+		Name:        "opencensus.io/rpc/server/response_count_by_status_code",
+		Description: "Server response count by RPC status code",
+		TagKeys:     []tag.Key{StatusCode},
+		Measure:     ServerLatency,
+		Aggregation: view.Count(),
+	}
+)
+
+// DefaultClientViews are the default client views provided by this package.
+var DefaultClientViews = []*view.View{
+	ClientRequestCountView,
+	ClientLatencyView,
+	ClientRequestCountByMethod,
+	ClientResponseCountByStatusCode,
+}
+
+// DefaultServerViews are the default server views provided by this package.
+var DefaultServerViews = []*view.View{
+	ServerRequestCountView,
+	ServerLatencyView,
+	ServerRequestCountByMethod,
+	ServerResponseCountByStatusCode,
+}
+
+// StatsProfile groups metrics-related data.
+type StatsProfile struct {
+	Role           string
+	CountMeasure   *stats.Int64Measure
+	LatencyMeasure *stats.Float64Measure
+}
+
+var (
+	// ClientProfile is used for RPC clients.
+	ClientProfile = &StatsProfile{
+		Role:           "client",
+		CountMeasure:   ClientRequestCount,
+		LatencyMeasure: ClientLatency,
+	}
+
+	// ServerProfile is used for RPC servers.
+	ServerProfile = &StatsProfile{
+		Role:           "server",
+		CountMeasure:   ServerRequestCount,
+		LatencyMeasure: ServerLatency,
+	}
+)

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/status.go

@@ -0,0 +1,45 @@
+package opencensus
+
+import (
+	"fmt"
+
+	microerr "go-micro.dev/v4/errors"
+
+	"go.opencensus.io/trace"
+
+	"google.golang.org/genproto/googleapis/rpc/code"
+)
+
+var microCodeToStatusCode = map[int32]code.Code{
+	400: code.Code_INVALID_ARGUMENT,
+	401: code.Code_UNAUTHENTICATED,
+	403: code.Code_PERMISSION_DENIED,
+	404: code.Code_NOT_FOUND,
+	409: code.Code_ABORTED,
+	500: code.Code_INTERNAL,
+}
+
+func getResponseStatus(err error) trace.Status {
+	if err != nil {
+		microErr, ok := err.(*microerr.Error)
+		if ok {
+			statusCode := microErr.Code
+			code, ok := microCodeToStatusCode[microErr.Code]
+			if ok {
+				statusCode = int32(code)
+			}
+
+			return trace.Status{
+				Code:    statusCode,
+				Message: fmt.Sprintf("%s: %s", microErr.Id, microErr.Detail),
+			}
+		}
+
+		return trace.Status{
+			Code:    int32(code.Code_UNKNOWN),
+			Message: err.Error(),
+		}
+	}
+
+	return trace.Status{}
+}

vendor/github.com/go-micro/plugins/v4/wrapper/trace/opencensus/tracker.go

@@ -0,0 +1,81 @@
+package opencensus
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"time"
+
+	"go.opencensus.io/stats"
+	"go.opencensus.io/tag"
+	"go.opencensus.io/trace"
+)
+
+type tracker struct {
+	startedAt time.Time
+
+	profile *StatsProfile
+	span    *trace.Span
+
+	method  string
+	service string
+}
+
+type requestDescriptor interface {
+	Service() string
+	Endpoint() string
+}
+
+type publicationDescriptor interface {
+	Topic() string
+}
+
+// newRequestTracker creates a new tracker for an RPC request (client or server).
+func newRequestTracker(req requestDescriptor, profile *StatsProfile) *tracker {
+	return &tracker{
+		profile: profile,
+		method:  req.Endpoint(),
+		service: req.Service(),
+	}
+}
+
+// newEventTracker creates a new tracker for a publication (client or server).
+func newEventTracker(pub publicationDescriptor, profile *StatsProfile) *tracker {
+	return &tracker{
+		profile: profile,
+		method:  pub.Topic(),
+		service: "pubsub",
+	}
+}
+
+// start monitoring a request. You can choose to let this method
+// start a span for the request or attach one later.
+func (t *tracker) start(ctx context.Context, startSpan bool) context.Context {
+	t.startedAt = time.Now()
+
+	ctx, _ = tag.New(ctx, tag.Upsert(Service, t.service), tag.Upsert(Endpoint, t.method))
+	stats.Record(ctx, t.profile.CountMeasure.M(1))
+
+	if startSpan {
+		ctx, t.span = trace.StartSpan(
+			ctx,
+			fmt.Sprintf("rpc/%s/%s/%s", t.profile.Role, t.service, t.method),
+		)
+	}
+
+	return ctx
+}
+
+// end a request's monitoring session. If there is a span ongoing, it will
+// be ended and metrics will be recorded.
+func (t *tracker) end(ctx context.Context, err error) {
+	status := getResponseStatus(err)
+
+	ctx, _ = tag.New(ctx, tag.Upsert(StatusCode, strconv.Itoa(int(status.Code))))
+	stats.Record(ctx, t.profile.LatencyMeasure.M(float64(time.Since(t.startedAt))/float64(time.Millisecond)))
+
+	if t.span != nil {
+		t.span.SetStatus(status)
+		t.span.End()
+	}
+}