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[otel-tracing] Added Tracing to Base package (driver) (#4196)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| package tracing | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| sdktrace "go.opentelemetry.io/otel/sdk/trace" | ||
| ) | ||
|
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| // compositeExporter is a custom exporter that wraps multiple SpanExporters. | ||
| // It allows you to export spans to multiple destinations, e.g., different telemetry backends. | ||
| type compositeExporter struct { | ||
| exporters []sdktrace.SpanExporter | ||
| } | ||
|
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| func newCompositeExporter(exporters ...sdktrace.SpanExporter) *compositeExporter { | ||
| return &compositeExporter{exporters: exporters} | ||
| } | ||
|
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| // ExportSpans iterates over each SpanExporter in the compositeExporter and | ||
| // exports the spans. If any exporter returns an error, the process is stopped | ||
| // and the error is returned. This ensures that span exporting behaves correctly | ||
| // and reports errors as expected. | ||
| func (ce *compositeExporter) ExportSpans(ctx context.Context, spans []sdktrace.ReadOnlySpan) error { | ||
| for _, exporter := range ce.exporters { | ||
| if err := exporter.ExportSpans(ctx, spans); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| // Shutdown iterates over each SpanExporter in the compositeExporter and | ||
| // shuts them down. If any exporter returns an error during shutdown, the process | ||
| // is stopped and the error is returned. This ensures proper shutdown of all exporters. | ||
| func (ce *compositeExporter) Shutdown(ctx context.Context) error { | ||
| for _, exporter := range ce.exporters { | ||
| if err := exporter.Shutdown(ctx); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| package tracing | ||
|
|
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| import ( | ||
| "context" | ||
| "errors" | ||
| "testing" | ||
|
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| "go.opentelemetry.io/otel/sdk/trace" | ||
| ) | ||
|
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| type mockSpanExporter struct { | ||
| exportSpansCalled bool | ||
| shutdownCalled bool | ||
| returnError bool | ||
| } | ||
|
|
||
| func (m *mockSpanExporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan) error { | ||
| m.exportSpansCalled = true | ||
| if m.returnError { | ||
| return errors.New("export error") | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func (m *mockSpanExporter) Shutdown(ctx context.Context) error { | ||
| m.shutdownCalled = true | ||
| if m.returnError { | ||
| return errors.New("shutdown error") | ||
| } | ||
| return nil | ||
| } | ||
| func TestCompositeExporterExportSpans(t *testing.T) { | ||
| mockExporter1 := &mockSpanExporter{} | ||
| mockExporter2 := &mockSpanExporter{} | ||
| composite := newCompositeExporter(mockExporter1, mockExporter2) | ||
|
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| err := composite.ExportSpans(context.Background(), nil) | ||
| if err != nil { | ||
| t.Errorf("ExportSpans() error = %v", err) | ||
| } | ||
|
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| if !mockExporter1.exportSpansCalled || !mockExporter2.exportSpansCalled { | ||
| t.Error("ExportSpans was not called on all exporters") | ||
| } | ||
| } | ||
|
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| func TestCompositeExporterExportSpans_Error(t *testing.T) { | ||
| mockExporter1 := &mockSpanExporter{returnError: true} | ||
| mockExporter2 := &mockSpanExporter{} | ||
| composite := newCompositeExporter(mockExporter1, mockExporter2) | ||
|
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| err := composite.ExportSpans(context.Background(), nil) | ||
| if err == nil { | ||
| t.Error("Expected error from ExportSpans, but got none") | ||
| } | ||
| } | ||
|
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| func TestCompositeExporterShutdown(t *testing.T) { | ||
| mockExporter1 := &mockSpanExporter{} | ||
| mockExporter2 := &mockSpanExporter{} | ||
| composite := newCompositeExporter(mockExporter1, mockExporter2) | ||
|
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| err := composite.Shutdown(context.Background()) | ||
| if err != nil { | ||
| t.Errorf("Shutdown() error = %v", err) | ||
| } | ||
|
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| if !mockExporter1.shutdownCalled || !mockExporter2.shutdownCalled { | ||
| t.Error("Shutdown was not called on all exporters") | ||
| } | ||
| } | ||
|
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| func TestCompositeExporterShutdown_Error(t *testing.T) { | ||
| mockExporter1 := &mockSpanExporter{returnError: true} | ||
| mockExporter2 := &mockSpanExporter{} | ||
| composite := newCompositeExporter(mockExporter1, mockExporter2) | ||
|
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| err := composite.Shutdown(context.Background()) | ||
| if err == nil { | ||
| t.Error("Expected error from Shutdown, but got none") | ||
| } | ||
| } |
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