Align mocha headers with W3C #9319
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PascalSenn merged 4 commits intomainfrom Mar 8, 2026
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Pull request overview
Updates Mocha’s tracing header propagation to follow W3C Trace Context semantics (traceparent/tracestate) across message headers and related OpenTelemetry integration points.
Changes:
- Replace custom trace header keys (
trace-id/span-id/etc.) with W3Ctraceparentandtracestate. - Update
WithActivityheader injection behavior and related unit tests. - Update receive/outbox activity parent context creation to derive from
traceparent(+ optionaltracestate).
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.
Show a summary per file
| File | Description |
|---|---|
| src/Mocha/test/Mocha.Tests/Telemetry/OpenTelemetryTests.cs | Updates tests to assert W3C traceparent/tracestate propagation and adds coverage for unsampled flags. |
| src/Mocha/src/Mocha/Observability/OpenTelemetryDiagnosticObserver.cs | Switches receive-side parent context construction to parse W3C traceparent and read tracestate. |
| src/Mocha/src/Mocha/Observability/OpenTelemetry.cs | Changes header injection from separate IDs to traceparent (+ conditional tracestate). |
| src/Mocha/src/Mocha/Headers/MessageHeaders.cs | Replaces legacy tracing header keys with W3C Trace Context keys/constants. |
| src/Mocha/src/Mocha.EntityFrameworkCore.Postgres/Outbox/OutboxProcessor.cs | Switches outbox send-side parent context construction to parse W3C traceparent and read tracestate. |
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #9319 +/- ##
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This was referenced May 1, 2026
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