settings: Instanciate only a single instance of the ServiceHandler/Store

Share the same instance between the HTTP and the GRPC service. This is
in preparation for moving the cache of the metadata storage backend to a
go-micro/store based implementation. By sharing the same service instance in
the HTTP and GRPC services we can avoid the usage of global variables for the
caches, which will make the move to the go-micro/store implementation simpler.

services/settings/pkg/server/http/option.go

@@ -6,6 +6,7 @@ import (
 	"github.com/owncloud/ocis/v2/ocis-pkg/log"
 	"github.com/owncloud/ocis/v2/services/settings/pkg/config"
 	"github.com/owncloud/ocis/v2/services/settings/pkg/metrics"
+	svc "github.com/owncloud/ocis/v2/services/settings/pkg/service/v0"
 	"github.com/urfave/cli/v2"
 )
 
@@ -14,12 +15,13 @@ type Option func(o *Options)
 
 // Options defines the available options for this package.
 type Options struct {
-	Name    string
-	Logger  log.Logger
-	Context context.Context
-	Config  *config.Config
-	Metrics *metrics.Metrics
-	Flags   []cli.Flag
+	Name           string
+	Logger         log.Logger
+	Context        context.Context
+	Config         *config.Config
+	Metrics        *metrics.Metrics
+	ServiceHandler svc.Service
+	Flags          []cli.Flag
 }
 
 // newOptions initializes the available default options.
@@ -74,3 +76,10 @@ func Flags(val []cli.Flag) Option {
 		o.Flags = append(o.Flags, val...)
 	}
 }
+
+// ServiceHandler provides a function to set the ServiceHandler option
+func ServiceHandler(val svc.Service) Option {
+	return func(o *Options) {
+		o.ServiceHandler = val
+	}
+}

services/settings/pkg/server/http/server.go

@@ -37,7 +37,7 @@ func Server(opts ...Option) (ohttp.Service, error) {
 		return ohttp.Service{}, fmt.Errorf("could not initialize http service: %w", err)
 	}
 
-	handle := svc.NewService(options.Config, options.Logger)
+	handle := options.ServiceHandler
 
 	{
 		handle = svc.NewInstrument(handle, options.Metrics)