Method log

libs/@local/hash-backend-utils/src/logger.ts:273–304

(
    info: winston.Logform.TransformableInfo & { message: unknown },
    callback: () => void,
  )

class OpenTelemetryLogTransport extends Transport {
  override log(
    info: winston.Logform.TransformableInfo & { message: unknown },
    callback: () => void,
  ): void {
    setImmediate(() => this.emit("logged", info));

    try {
      const globalProvider = logs.getLoggerProvider();
      const otelLogger = globalProvider.getLogger("winston", "1.0.0");

      const { level, message, ...rest } = info;

      const attributes: AnyValueMap = sanitizeAttributes(rest);

      const spanContext = trace.getActiveSpan()?.spanContext();
      if (spanContext) {
        attributes.trace_id = spanContext.traceId as AnyValue;
        attributes.span_id = spanContext.spanId as AnyValue;
      }

      otelLogger.emit({
        body: toAnyValue(message),
        severityText: level.toUpperCase(),
        severityNumber: mapWinstonLevelToOtel(level),
        attributes,
      });
    } catch {
      // best-effort: do not throw from logger
    }

    callback();
  }
}

export class Logger {