Package com.babelqueue.otel

package com.babelqueue.otel
Optional OpenTelemetry tracing for babelqueue (ADR-0025) — the Java mirror of the Go babelqueue-go/otel module.

Tracing emits a CONSUMER span per handled message and a PRODUCER span per publish, correlating them across every hop and SDK through the envelope's trace_id — a UUID, which maps 1:1 to a 32-hex OpenTelemetry trace id. The wire envelope is untouched, and io.opentelemetry:opentelemetry-api is declared as an optional dependency, so the core stays zero-dependency for users who do not opt in.

Every hop that shares a trace_id shares one OTel trace. Exact cross-hop span parent-child linkage (W3C traceparent as a transport header) is a documented follow-up.