Observe the Kotlin Client

The runtime exposes the same credential- and payload-free windows as the Java SDK: a diagnostics snapshot, a bounded observer stream, and optional metrics and tracing bridges.

Diagnostics

repost.diagnostics returns a credential- and payload-free snapshot: inFlightOperations, droppedObserverEvents, observerFailures, and admission-rejection counters.

Observers and bridges

Register a RepostObserver (via the observer config property) for bounded lifecycle events, or wire a metrics or tracing bridge. The observer is intentionally lossy (a bounded 1,024-event queue that drops and counts rather than blocking a send) and runs off the transport thread, so a slow or throwing observer never changes an application send:

// sh.repost:repost-client-micrometer
RepostClient {
    observer = MicrometerRepostObserver.create(meterRegistry)
}

// sh.repost:repost-client-opentelemetry
RepostClient {
    telemetry = OpenTelemetryRepostTelemetry.create(openTelemetry)
}

The recorded meters and spans are identical to the Java SDK: repost.client.* meters tagged with outcome, error.code, delivery.state, and http.status.class, and one repost.send span with a repost.send.attempt child per attempt — low-cardinality metadata only, never payloads or credentials.

Continue

Testing

A recording transport, deterministic clocks, and a no-network guard.

Frameworks

Spring Boot auto-wires these bridges when a registry bean is present.

Reliability

The delivery states and error codes these signals report.

Send

Schema

Publishing

Delivery

Customer experience

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Kotlin

Observe the Kotlin Client

Diagnostics

Observers and bridges

Continue

Testing

Frameworks

Reliability

​Diagnostics

​Observers and bridges

​Continue

Testing

Frameworks

Reliability

Diagnostics

Observers and bridges

Continue