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LogSink

Interface that defines an output destination for structured events.

abstract class LogSink {
  Future<void> write(LogModel event);
}

Contract​

  • Receives a complete LogModel on each call.
  • Returns Future<void> — may perform async I/O.
  • Built-in implementations: SimpleLineSink, DefaultSink, SinkSeq.

When to implement​

Create a custom LogSink when you need to send logs to:

  • Local files
  • Observability services (Datadog, Sentry, CloudWatch, etc.)
  • Databases or message queues
  • Any proprietary HTTP API

See the custom sink guide.