c

akka.projection.javadsl

StatefulHandler

abstract class StatefulHandler[State, Envelope] extends Handler[Envelope]

Source
StatefulHandler.scala
Linear Supertypes
Handler[Envelope], HandlerLifecycle, AnyRef, Any
Ordering
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Inherited
  1. StatefulHandler
  2. Handler
  3. HandlerLifecycle
  4. AnyRef
  5. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new StatefulHandler()

Abstract Value Members

  1. abstract def initialState(): CompletionStage[State]

    Invoked to load the initial state when the projection is started or if previous process failed.

  2. abstract def process(state: State, envelope: Envelope): CompletionStage[State]

    The process method is invoked for each Envelope.

    The process method is invoked for each Envelope. One envelope is processed at a time. The returned CompletionStage<State> is to be completed when the processing of the envelope has finished. It will not be invoked with the next envelope until after the returned CompletionStage has been completed.

    The state is the completed value of the previously returned CompletionStage<State> or the initialState. If the previously returned CompletionStage<State> failed it will call initialState again and use that value.

    Annotations
    @throws(classOf[Exception])

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  8. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate() @native()
  9. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate() @native()
  10. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  11. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  13. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  14. final def process(envelope: Envelope): CompletionStage[Done]

    Calls process(state, envelope) with the completed value of the previously returned CompletionStage<State> or the initialState.

    Calls process(state, envelope) with the completed value of the previously returned CompletionStage<State> or the initialState. If the previously returned CompletionStage<State> failed it will call initialState again and use that value.

    Definition Classes
    StatefulHandler → Handler
  15. final def start(): CompletionStage[Done]

    Calls StatefulHandler.initialState when the projection is started.

    Calls StatefulHandler.initialState when the projection is started.

    Definition Classes
    StatefulHandler → Handler → HandlerLifecycle
  16. def stop(): CompletionStage[Done]

    Invoked when the projection has been stopped.

    Invoked when the projection has been stopped. Can be overridden to implement resource cleanup. It is also called when the Projection is restarted after a failure.

    Definition Classes
    Handler → HandlerLifecycle
  17. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  18. def toString(): String
    Definition Classes
    AnyRef → Any
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  21. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

Inherited from Handler[Envelope]

Inherited from HandlerLifecycle

Inherited from AnyRef

Inherited from Any

Ungrouped