Module propagation 

Trace context propagation helpers for grafos-rpc and grafos-mq.

This module provides functions to inject and extract trace context from binary headers (for RPC shared-memory transport) and from message headers (for MQ message passing).

The RPC propagation extends the shared-memory request region header with a 32-byte trace context field. MQ propagation uses the "traceparent" header key in the message’s headers field.

Constants

TRACEPARENT_HEADER

The W3C header name used for MQ trace propagation.

Functions

decode_binary

Decode a trace context from a 32-byte buffer read from an RPC header.

encode_binary

Encode a trace context into a 32-byte buffer suitable for embedding in an RPC shared-memory header.

extract_traceparent

Extract a trace context from a header list.

extract_traceparent_strict

Extract a trace context from a header list, returning the parse error if the header is present but malformed.

generate_trace_id

Generate a fresh W3C traceparent string suitable for correlation.

inject_traceparent

Inject a trace context as a W3C traceparent string into a header list.