Packages

  • package root
    Definition Classes
    root
  • package akka
    Definition Classes
    root
  • package projection
    Definition Classes
    akka
  • package grpc
    Definition Classes
    projection
  • package consumer
    Definition Classes
    grpc
  • package scaladsl
    Definition Classes
    consumer
  • object EventProducerPushDestination

    A passive consumer service for event producer push that can be bound as a gRPC endpoint accepting active producers pushing events, for example to run a projection piercing firewalls or NAT.

    A passive consumer service for event producer push that can be bound as a gRPC endpoint accepting active producers pushing events, for example to run a projection piercing firewalls or NAT. Events are pushed directly into the configured journal and can then be consumed through a local projection. A producer can push events for multiple entities but no two producer are allowed to push events for the same entity, at the same time.

    The event consumer service is not needed for normal projections over gRPC where the consuming side can access and initiate connections to the producing side.

    Producers are started using the akka.projection.grpc.producer.scaladsl.EventProducerPush API.

    Definition Classes
    scaladsl
  • Transformation

final class Transformation extends AnyRef

Transformation of incoming pushed events from the producer to the internal representation stored in the journal and seen by local projections. Start from Transformation.empty when defining transformations.

Source
EventProducerPushDestination.scala
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  14. def registerEnvelopeMapper[A, B](f: (EventEnvelope[A]) => Option[B])(implicit arg0: ClassTag[A]): Transformation

    Transform incoming event payloads, with access to the entire envelope for additional metadata.

    Transform incoming event payloads, with access to the entire envelope for additional metadata.

    Events can be excluded by mapping the payload to None.

  15. def registerMapper[A, B](f: (A) => Option[B])(implicit arg0: ClassTag[A]): Transformation

    Transform incoming event payloads.

    Transform incoming event payloads.

    Events can be excluded by mapping the payload to None.

  16. def registerOrElsePayloadMapper(f: (EventEnvelope[Any]) => Option[Any]): Transformation

    Events can be excluded by mapping the payload to None.

  17. def registerPersistenceIdMapper(f: (EventEnvelope[Any]) => String)(implicit system: ActorSystem[_]): Transformation

    Transform incoming persistence ids, care must be taken to produce a valid persistence id and to always map the same incoming persistence id to the same stored persistence id to not introduce gaps in the sequence numbers and break consuming projections.

  18. def registerTagMapper[A](f: (EventEnvelope[A]) => Set[String])(implicit arg0: ClassTag[A]): Transformation

    Add or replace tags for incoming events

  19. final def synchronized[T0](arg0: => T0): T0
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    (Since version 9)

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