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Nanaloveyuki
26 lines
835 B
Markdown
26 lines
835 B
Markdown
---
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name: trace-context
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group: api
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category: observability
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update-time: 20260719
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description: Represent and bind distributed trace metadata using stable structured-log fields.
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key-word:
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- trace
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- context
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- observability
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---
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## Trace-context
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`TraceContext` carries the standard log fields used to correlate records with distributed traces: `trace_id`, `span_id`, `trace_flags`, and optional `trace_state`.
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```moonbit
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let context = trace_context(
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"4bf92f3577b34da6a3ce929d0e0e4736",
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"00f067aa0ba902b7",
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trace_state="vendor=value",
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)
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```
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Use `context.as_fields()` when integrating with a custom carrier, or pass the value to a logger's `with_trace_context(...)` helper. BitLogger does not parse HTTP headers or export OTLP data; an application-owned tracing library remains responsible for propagation and sampling.
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