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https://github.com/open-telemetry/opentelemetry-go.git
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640a0cd8bc
* bridge/opentracing: add NewDynamicWrappedTracerProvider for named tracers * bridge/opentelmeetry: cache created Tracers, add tests * bridge/opentracing: rename constructor to NewTracerProvider * add license header * Update docstring Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> * fix deprecated docstring * rewrite new lookup TracerProvider as separate type * update docstring * add changelog entries * Update bridge/opentracing/provider.go Co-authored-by: Damien Mathieu <42@dmathieu.com> Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> Co-authored-by: Damien Mathieu <42@dmathieu.com>
72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
// Copyright The OpenTelemetry Authors
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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 opentracing // import "go.opentelemetry.io/otel/bridge/opentracing"
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import (
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"sync"
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"go.opentelemetry.io/otel/trace"
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)
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// TracerProvider is an OpenTelemetry TracerProvider that wraps an OpenTracing
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// Tracer.
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type TracerProvider struct {
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bridge *BridgeTracer
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provider trace.TracerProvider
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tracers map[wrappedTracerKey]*WrapperTracer
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mtx sync.Mutex
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}
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var _ trace.TracerProvider = (*TracerProvider)(nil)
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// NewTracerProvider returns a new TracerProvider that creates new instances of
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// WrapperTracer from the given TracerProvider.
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func NewTracerProvider(bridge *BridgeTracer, provider trace.TracerProvider) *TracerProvider {
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return &TracerProvider{
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bridge: bridge,
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provider: provider,
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tracers: make(map[wrappedTracerKey]*WrapperTracer),
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}
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}
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type wrappedTracerKey struct {
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name string
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version string
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}
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// Tracer creates a WrappedTracer that wraps the OpenTelemetry tracer for each call to
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// Tracer(). Repeated calls to Tracer() with the same configuration will look up and
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// return an existing instance of WrapperTracer.
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func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
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p.mtx.Lock()
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defer p.mtx.Unlock()
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c := trace.NewTracerConfig(opts...)
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key := wrappedTracerKey{
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name: name,
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version: c.InstrumentationVersion(),
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}
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if t, ok := p.tracers[key]; ok {
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return t
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}
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wrapper := NewWrapperTracer(p.bridge, p.provider.Tracer(name, opts...))
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p.tracers[key] = wrapper
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return wrapper
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}
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