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feat(internal/trace): add OpenTelemetry support (#8655)
Add GOOGLE_API_GO_EXPERIMENTAL_TELEMETRY_PLATFORM_TRACING env var flag for opt-in OpenTelemetry tracing. refs: #2205
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| // Copyright 2023 Google LLC | ||
| // | ||
| // 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 testutil | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
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| "go.opentelemetry.io/otel" | ||
| sdktrace "go.opentelemetry.io/otel/sdk/trace" | ||
| "go.opentelemetry.io/otel/sdk/trace/tracetest" | ||
| ) | ||
|
|
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| // OpenTelemetryTestExporter is a test utility exporter. It should be created | ||
| // with NewOpenTelemetryTestExporter. | ||
| type OpenTelemetryTestExporter struct { | ||
| exporter *tracetest.InMemoryExporter | ||
| tp *sdktrace.TracerProvider | ||
| } | ||
|
|
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| // NewOpenTelemetryTestExporter creates a OpenTelemetryTestExporter with | ||
| // underlying InMemoryExporter and TracerProvider from OpenTelemetry. | ||
| func NewOpenTelemetryTestExporter() *OpenTelemetryTestExporter { | ||
| exporter := tracetest.NewInMemoryExporter() | ||
| tp := sdktrace.NewTracerProvider( | ||
| sdktrace.WithSyncer(exporter), | ||
| sdktrace.WithSampler(sdktrace.AlwaysSample()), | ||
| ) | ||
| otel.SetTracerProvider(tp) | ||
| return &OpenTelemetryTestExporter{ | ||
| exporter: exporter, | ||
| tp: tp, | ||
| } | ||
| } | ||
|
|
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| // Spans returns the current in-memory stored spans. | ||
| func (te *OpenTelemetryTestExporter) Spans() tracetest.SpanStubs { | ||
| return te.exporter.GetSpans() | ||
| } | ||
|
|
||
| // Unregister shuts down the underlying OpenTelemetry TracerProvider. | ||
| func (te *OpenTelemetryTestExporter) Unregister(ctx context.Context) { | ||
| te.tp.Shutdown(ctx) | ||
| } |
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