Packages

trait Projection[Envelope] extends AnyRef

The core abstraction in Pekko Projections.

A projection instance may share the same name and Envelope, but must have a unique key. The key is used to achieve processing parallelism for a projection.

For example, many projections may share the same name "user-events-projection", but can process events for different sharded entities within Pekko Cluster, where key could be the Pekko Cluster shardId.

Envelope

The envelope type of the projection.

Annotations
@ApiMayChange()
Source
Projection.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
AtLeastOnceFlowProjection, AtLeastOnceProjection, AtMostOnceProjection, ExactlyOnceProjection, GroupedProjection, AtLeastOnceFlowProjection, AtLeastOnceProjection, AtMostOnceProjection, ExactlyOnceProjection, GroupedProjection, TestProjection, TestProjection
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Abstract Value Members

  1. abstract def projectionId: ProjectionId
  2. abstract def statusObserver: StatusObserver[Envelope]
  3. abstract def withRestartBackoff(minBackoff: Duration, maxBackoff: Duration, randomFactor: Double, maxRestarts: Int): Projection[Envelope]

    Java API

  4. abstract def withRestartBackoff(minBackoff: Duration, maxBackoff: Duration, randomFactor: Double): Projection[Envelope]

    Java API

  5. abstract def withRestartBackoff(minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double, maxRestarts: Int): Projection[Envelope]
  6. abstract def withRestartBackoff(minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double): Projection[Envelope]
  7. abstract def withStatusObserver(observer: StatusObserver[Envelope]): Projection[Envelope]

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  1. final def !=(arg0: Any): Boolean
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