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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // | ||
| // 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. | ||
|
|
||
| package opentracing // import "go.opentelemetry.io/otel/bridge/opentracing" | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| "go.opentelemetry.io/otel/trace" | ||
| ) | ||
|
|
||
| // TracerProvider is an OpenTelemetry TracerProvider that wraps an OpenTracing | ||
| // Tracer. | ||
| type TracerProvider struct { | ||
| bridge *BridgeTracer | ||
| provider trace.TracerProvider | ||
|
|
||
| tracers map[wrappedTracerKey]*WrapperTracer | ||
| mtx sync.Mutex | ||
| } | ||
|
|
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| var _ trace.TracerProvider = (*TracerProvider)(nil) | ||
|
|
||
| // NewTracerProvider returns a new TracerProvider that creates new instances of | ||
| // WrapperTracer from the given TracerProvider. | ||
| func NewTracerProvider(bridge *BridgeTracer, provider trace.TracerProvider) *TracerProvider { | ||
| return &TracerProvider{ | ||
| bridge: bridge, | ||
| provider: provider, | ||
|
|
||
| tracers: make(map[wrappedTracerKey]*WrapperTracer), | ||
| } | ||
| } | ||
|
|
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| type wrappedTracerKey struct { | ||
| name string | ||
| version string | ||
| } | ||
|
|
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| // Tracer creates a WrappedTracer that wraps the OpenTelemetry tracer for each call to | ||
| // Tracer(). Repeated calls to Tracer() with the same configuration will look up and | ||
| // return an existing instance of WrapperTracer. | ||
| func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer { | ||
| p.mtx.Lock() | ||
| defer p.mtx.Unlock() | ||
|
|
||
| c := trace.NewTracerConfig(opts...) | ||
| key := wrappedTracerKey{ | ||
| name: name, | ||
| version: c.InstrumentationVersion(), | ||
| } | ||
|
|
||
| if t, ok := p.tracers[key]; ok { | ||
| return t | ||
| } | ||
|
|
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| wrapper := NewWrapperTracer(p.bridge, p.provider.Tracer(name, opts...)) | ||
| p.tracers[key] = wrapper | ||
| return wrapper | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // | ||
| // 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. | ||
|
|
||
| package opentracing | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "go.opentelemetry.io/otel/bridge/opentracing/internal" | ||
| "go.opentelemetry.io/otel/trace" | ||
| ) | ||
|
|
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| type namedMockTracer struct { | ||
| name string | ||
| *internal.MockTracer | ||
| } | ||
|
|
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| type namedMockTracerProvider struct{} | ||
|
|
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| var _ trace.TracerProvider = (*namedMockTracerProvider)(nil) | ||
|
|
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| // Tracer returns the WrapperTracer associated with the WrapperTracerProvider. | ||
| func (p *namedMockTracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer { | ||
| return &namedMockTracer{ | ||
| name: name, | ||
| MockTracer: internal.NewMockTracer(), | ||
| } | ||
| } | ||
|
|
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| func TestTracerProvider(t *testing.T) { | ||
| // assertMockTracerName casts tracer into a named mock tracer provided by | ||
| // namedMockTracerProvider, and asserts against its name | ||
| assertMockTracerName := func(t *testing.T, tracer trace.Tracer, name string) { | ||
| // Unwrap the tracer | ||
| wrapped := tracer.(*WrapperTracer) | ||
| tracer = wrapped.tracer | ||
|
|
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| // Cast into the underlying type and assert | ||
| if mock, ok := tracer.(*namedMockTracer); ok { | ||
| if name != mock.name { | ||
| t.Errorf("expected name %q, got %q", name, mock.name) | ||
| } | ||
| } else if !ok { | ||
| t.Errorf("expected *namedMockTracer, got %T", mock) | ||
| } | ||
| } | ||
|
|
||
| var ( | ||
| foobar = "foobar" | ||
| bazbar = "bazbar" | ||
| provider = NewTracerProvider(nil, &namedMockTracerProvider{}) | ||
| ) | ||
|
|
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| t.Run("Tracers should be created with foobar from provider", func(t *testing.T) { | ||
| tracer := provider.Tracer(foobar) | ||
| assertMockTracerName(t, tracer, foobar) | ||
| }) | ||
|
|
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| t.Run("Repeated requests to create a tracer should provide the existing tracer", func(t *testing.T) { | ||
| tracer1 := provider.Tracer(foobar) | ||
| assertMockTracerName(t, tracer1, foobar) | ||
| tracer2 := provider.Tracer(foobar) | ||
| assertMockTracerName(t, tracer2, foobar) | ||
| tracer3 := provider.Tracer(bazbar) | ||
| assertMockTracerName(t, tracer3, bazbar) | ||
|
|
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| if tracer1 != tracer2 { | ||
| t.Errorf("expected the same tracer, got different tracers") | ||
| } | ||
| if tracer1 == tracer3 || tracer2 == tracer3 { | ||
| t.Errorf("expected different tracers, got the same tracer") | ||
| } | ||
| }) | ||
| } |
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