t

akka.stream.stage

AsyncCallback

trait AsyncCallback[T] extends AnyRef

An asynchronous callback holder that is attached to a GraphStageLogic. Initializing AsyncCallback#invoke will eventually lead to the registered handler being called.

This holder has the same lifecycle as a stream and cannot be used before materialization is done.

Typical use cases are exchanging messages between stream and substreams or invoking from external world sending event to a stream

Source
GraphStage.scala
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Inherited
  1. AsyncCallback
  2. AnyRef
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Abstract Value Members

  1. abstract def invoke(t: T): Unit

    Dispatch an asynchronous notification.

    Dispatch an asynchronous notification. This method is thread-safe and may be invoked from external execution contexts.

    For cases where it is important to know if the notification was ever processed or not see [AsyncCallback#invokeWithFeedback]]

  2. abstract def invokeWithFeedback(t: T): Future[Done]

    Dispatch an asynchronous notification.

    Dispatch an asynchronous notification. This method is thread-safe and may be invoked from external execution contexts.

    The method returns directly and the returned future is then completed once the event has been handled by the operator, if the event triggers an exception from the handler the future is failed with that exception and finally if the operator was stopped before the event has been handled the future is failed with StreamDetachedException.

    The handling of the returned future incurs a slight overhead, so for cases where it does not matter to the invoking logic see AsyncCallback#invoke

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toany2stringadd[AsyncCallback[T]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (AsyncCallback[T], B)
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toArrowAssoc[AsyncCallback[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native() @HotSpotIntrinsicCandidate()
  8. def ensuring(cond: (AsyncCallback[T]) => Boolean, msg: => Any): AsyncCallback[T]
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toEnsuring[AsyncCallback[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (AsyncCallback[T]) => Boolean): AsyncCallback[T]
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toEnsuring[AsyncCallback[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: => Any): AsyncCallback[T]
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toEnsuring[AsyncCallback[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): AsyncCallback[T]
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toEnsuring[AsyncCallback[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  14. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toStringFormat[AsyncCallback[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  15. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  16. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  17. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  21. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  22. def toString(): String
    Definition Classes
    AnyRef → Any
  23. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  24. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  25. 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
  2. def [B](y: B): (AsyncCallback[T], B)
    Implicit
    This member is added by an implicit conversion from AsyncCallback[T] toArrowAssoc[AsyncCallback[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromAsyncCallback[T] to any2stringadd[AsyncCallback[T]]

Inherited by implicit conversion StringFormat fromAsyncCallback[T] to StringFormat[AsyncCallback[T]]

Inherited by implicit conversion Ensuring fromAsyncCallback[T] to Ensuring[AsyncCallback[T]]

Inherited by implicit conversion ArrowAssoc fromAsyncCallback[T] to ArrowAssoc[AsyncCallback[T]]

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