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Structured Logging

  • Format: JSON per-line logs with fields: timestamp, level, service, pid, message, meta, data.
  • Initialization: The application initializes structured logging on startup via initStructuredLogging() in src/main.ts.
  • Request tracing: Each HTTP request gets an x-request-id header and two logs: request_start and request_end with durationMs and statusCode.

Recommendations for aggregation and parsing:

  • Send stdout/stderr to your log collector (CloudWatch, Datadog, ELK, Splunk). The logs are JSON so they can be indexed and searched.
  • Use service and requestId fields to correlate traces across services.

If you want to switch to a production logger (pino/winston), replace src/logging/structured-logging.ts with an adapter that writes structured JSON and preserves these fields.