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Nanaloveyuki
19 lines
907 B
Markdown
19 lines
907 B
Markdown
# Trace Context
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BitLogger keeps trace interoperability in its structured record model rather than owning HTTP propagation or a telemetry transport. Use the tracing library already selected by the application to extract a request context, then bind its identifiers to the logger.
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```moonbit
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let request_logger = logger.with_trace_context(
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@log.trace_context(
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trace_id,
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span_id,
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trace_flags="01",
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trace_state=trace_state,
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),
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)
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```
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Every record from `request_logger` receives `trace_id`, `span_id`, `trace_flags`, and, when supplied, `trace_state`. The base logger is unchanged, so a child request cannot leak identifiers into unrelated work.
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Use `context.as_fields()` for a custom logger facade. BitLogger intentionally does not parse `traceparent` headers, create spans, make sampling decisions, or export OTLP data; those concerns remain with the application tracing implementation.
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