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trait SourceAndAck[F[_]] extends AnyRef

The machinery for sourcing events from and external stream and then acking/checkpointing them.

Implementations of this trait are provided by the sources library (e.g. kinesis, kafka, pubsub) whereas implementations of EventProcessor are provided by the specific application (e.g. enrich, transformer, loaders)

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  1. abstract def processingLatency: F[FiniteDuration]

    Measurement of how long the EventProcessor has spent processing any pending un-acked events.

    Measurement of how long the EventProcessor has spent processing any pending un-acked events.

    Note, unlike our statsd metrics, this measurement does not consider min/max values over a period of time. It is a snapshot measurement for a single point in time.

    This measurement is designed to be used as a health probe. If events are getting processed quickly then latency is low and the probe should report healthy. If any event is "stuck" then latency is high and the probe should report unhealthy.

  2. abstract def stream(config: EventProcessingConfig, processor: EventProcessor[F]): Stream[F, Nothing]

    Wraps the EventProcessor to create a Stream which, when compiled drained, causes events to flow through the processor.

    Wraps the EventProcessor to create a Stream which, when compiled drained, causes events to flow through the processor.

    config

    Configures how events are fed into the processor, e.g. whether to use timed windows

    processor

    The EventProcessor, which is implemented by the specific application, e.g. enrich or a loader

    returns

    A stream which should be compiled and drained

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    Deprecated

    (Since version 9)

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