[arjun-rajappa]

Why

Trace context was only propagated through AWS messaging using the proprietary X-INSTANA-* headers, so services not using the Instana tracer couldn't continue the trace. SQS and SNS also cap messages at 10 message attributes, so adding headers blindly could make a publish fail. Separately, four instrumentations each carried their own copy of a traceparent/tracestate regex, and Shoryuken broke on messages without Instana headers.

What

• Outbound W3C headers
  • aws_sdk_sqs.rb and aws_sdk_sns.rb inject traceparent and tracestate alongside X_INSTANA_T/S/L.
  • When fewer than 5 of the 10 message attribute slots are free, only the W3C headers are injected.
  • SNS publish_batch is now supported through a shared inject_trace_attributes helper.
  • aws_sdk_lambda.rb adds traceparent and tracestate to the client_context payload and guards against a nil span context.
• Shared parser: add Instana::Util.parse_w3c_trace_context(traceparent, tracestate) in util.rb.
  • It uses the OpenTelemetry trace-context propagator.
  • It returns nil on invalid input.
  • Otherwise it returns trace_id, span_id, level and the external_* values.
  • The Instana in=<trace>;<span> tracestate entry takes precedence.
  • Metrics/ModuleLength is disabled inline on Instana::Util.
• Callers: shoryuken.rb, bunny.rb, grpc.rb and active_job.rb replace their duplicated regexes with the shared parser.
• Shoryuken: falls back to traceparent when X_INSTANA_T is absent, defaults the level to 1, and starts a fresh span when there is no incoming context.
• Behavior change: the OTel parser is stricter than the old regexes. It accepts uppercase hex, rejects all-zero ids and tolerates trailing fields, and returns nil for malformed headers.
• Tests: add coverage in test/instrumentation/aws_test.rb and test/instrumentation/shoryuken_test.rb.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
88.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[pvital]

It looks good to me.