mirror of
https://github.com/dolthub/dolt.git
synced 2026-05-04 11:30:14 -05:00
Aaron Son
47 lines
1.6 KiB
Go
47 lines
1.6 KiB
Go
// Copyright 2020 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tracing
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import (
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"context"
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"github.com/opentracing/opentracing-go"
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)
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// Called throughout dolt to get the tracer. Default implementation returns
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// opentracing.GlobalTracer(), but another implementation could be installed to
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// return a context-specific tracer.
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var Tracer func(ctx context.Context) opentracing.Tracer
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func init() {
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Tracer = func(ctx context.Context) opentracing.Tracer {
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return opentracing.GlobalTracer()
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}
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}
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// Start a new span, named `name`, as a child of the current span associated
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// with `ctx`. Starts a root span if there is no Span associated with `ctx`.
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// Returns the newly created Span and a new `ctx` associated with the Span.
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func StartSpan(ctx context.Context, name string) (opentracing.Span, context.Context) {
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parentSpan := opentracing.SpanFromContext(ctx)
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var opts []opentracing.StartSpanOption
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if parentSpan != nil {
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opts = append(opts, opentracing.ChildOf(parentSpan.Context()))
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}
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span := Tracer(ctx).StartSpan(name, opts...)
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ctx = opentracing.ContextWithSpan(ctx, span)
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return span, ctx
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}
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