Package org.apache.pekko.stream.stage

Class TimerGraphStageLogic

java.lang.Object

org.apache.pekko.stream.stage.GraphStageLogic

org.apache.pekko.stream.stage.TimerGraphStageLogic

Direct Known Subclasses:

TimerGraphStageLogicWithLogging

public abstract class TimerGraphStageLogic
extends GraphStageLogic

Provides timer related facilities to a GraphStageLogic.

To be thread safe the methods of this class must only be called from either the constructor of the graph operator during materialization or one of the methods invoked by the graph operator machinery, such as onPush and onPull.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pekko.stream.stage.GraphStageLogic

GraphStageLogic.ConditionalTerminateInput, GraphStageLogic.ConditionalTerminateOutput, GraphStageLogic.EagerTerminateInput$, GraphStageLogic.EagerTerminateOutput$, GraphStageLogic.IgnoreTerminateInput$, GraphStageLogic.IgnoreTerminateOutput$, GraphStageLogic.StageActor, GraphStageLogic.StageActorRef$, GraphStageLogic.StageActorRefNotInitializedException, GraphStageLogic.StageActorRefNotInitializedException$, GraphStageLogic.SubSinkInlet<T>, GraphStageLogic.SubSourceOutlet<T>, GraphStageLogic.TotallyIgnorantInput$

Constructor Summary

Constructors

Constructor	Description
TimerGraphStageLogic(Shape _shape)

Method Summary

Modifier and Type	Method	Description
protected void	afterPostStop()	INTERNAL API
protected final void	cancelTimer(Object timerKey)	Cancel timer, ensuring that the onTimer(java.lang.Object) is not subsequently called.
protected final boolean	isTimerActive(Object timerKey)	Inquire whether the timer is still active.
protected void	onTimer(Object timerKey)	Will be called when the scheduled timer is triggered.
protected final void	scheduleAtFixedRate(Object timerKey, Duration initialDelay, Duration interval)	Schedule timer to call onTimer(java.lang.Object) periodically with the given interval after the specified initial delay.
protected final void	scheduleAtFixedRate(Object timerKey, scala.concurrent.duration.FiniteDuration initialDelay, scala.concurrent.duration.FiniteDuration interval)	Schedule timer to call onTimer(java.lang.Object) periodically with the given interval after the specified initial delay.
protected final void	scheduleOnce(Object timerKey, Duration delay)	Schedule timer to call onTimer(java.lang.Object) after given delay.
protected final void	scheduleOnce(Object timerKey, scala.concurrent.duration.FiniteDuration delay)	Schedule timer to call onTimer(java.lang.Object) after given delay.
protected final void	scheduleWithFixedDelay(Object timerKey, Duration initialDelay, Duration interval)	Schedule timer to call onTimer(java.lang.Object) periodically with the given delay after the specified initial delay.
protected final void	scheduleWithFixedDelay(Object timerKey, scala.concurrent.duration.FiniteDuration initialDelay, scala.concurrent.duration.FiniteDuration delay)	Schedule timer to call onTimer(java.lang.Object) periodically with the given delay after the specified initial delay.

Methods inherited from class org.apache.pekko.stream.stage.GraphStageLogic

abortEmitting, abortReading, beforePreStart, cancel, cancel, cancelStage, complete, completeStage, conditionalTerminateInput, conditionalTerminateOutput, createAsyncCallback, eagerTerminateInput, eagerTerminateOutput, emit, emit, emit, emitMultiple, emitMultiple, emitMultiple, emitMultiple, emitMultiple, emitMultiple, emitMultiple, fail, failStage, getAsyncCallback, getEagerStageActor, getHandler, getHandler, getStageActor, grab, hasBeenPulled, ignoreTerminateInput, ignoreTerminateOutput, inCount, isAvailable, isAvailable, isClosed, isClosed, materializer, outCount, passAlong, passAlong$default$3, passAlong$default$4, passAlong$default$5, postStop, preStart, pull, push, read, read, readN, readN, setHandler, setHandler, setHandlers, setKeepGoing, stageActor, stageActorName, subFusingMaterializer, toString, totallyIgnorantInput, tryPull

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

TimerGraphStageLogic

public TimerGraphStageLogic(Shape _shape)

Method Details

afterPostStop

protected void afterPostStop()

Description copied from class: GraphStageLogic

INTERNAL API

Overrides:

afterPostStop in class GraphStageLogic

cancelTimer

protected final void cancelTimer(Object timerKey)

Cancel timer, ensuring that the onTimer(java.lang.Object) is not subsequently called.

Parameters:

timerKey - key of the timer to cancel

isTimerActive

protected final boolean isTimerActive(Object timerKey)

Inquire whether the timer is still active. Returns true unless the timer does not exist, has previously been canceled or if it was a single-shot timer that was already triggered.

onTimer

protected void onTimer(Object timerKey)
                throws Exception

Will be called when the scheduled timer is triggered.

Parameters:

timerKey - key of the scheduled timer

Throws:

Exception

scheduleAtFixedRate

protected final void scheduleAtFixedRate(Object timerKey,
 scala.concurrent.duration.FiniteDuration initialDelay,
 scala.concurrent.duration.FiniteDuration interval)

Schedule timer to call onTimer(java.lang.Object) periodically with the given interval after the specified initial delay. Any existing timer with the same key will automatically be canceled before adding the new timer.

scheduleAtFixedRate

protected final void scheduleAtFixedRate(Object timerKey,
 Duration initialDelay,
 Duration interval)

Schedule timer to call onTimer(java.lang.Object) periodically with the given interval after the specified initial delay. Any existing timer with the same key will automatically be canceled before adding the new timer.

scheduleOnce

protected final void scheduleOnce(Object timerKey,
 scala.concurrent.duration.FiniteDuration delay)

Schedule timer to call onTimer(java.lang.Object) after given delay. Any existing timer with the same key will automatically be canceled before adding the new timer.

scheduleOnce

protected final void scheduleOnce(Object timerKey,
 Duration delay)

Schedule timer to call onTimer(java.lang.Object) after given delay. Any existing timer with the same key will automatically be canceled before adding the new timer.

scheduleWithFixedDelay

protected final void scheduleWithFixedDelay(Object timerKey,
 scala.concurrent.duration.FiniteDuration initialDelay,
 scala.concurrent.duration.FiniteDuration delay)

Schedule timer to call onTimer(java.lang.Object) periodically with the given delay after the specified initial delay. Any existing timer with the same key will automatically be canceled before adding the new timer.

scheduleWithFixedDelay

protected final void scheduleWithFixedDelay(Object timerKey,
 Duration initialDelay,
 Duration interval)

Schedule timer to call onTimer(java.lang.Object) periodically with the given delay after the specified initial delay. Any existing timer with the same key will automatically be canceled before adding the new timer.