com.google.cloud.dataflow.sdk.transforms.windowing

Class AfterProcessingTime<W extends BoundedWindow>

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>

com.google.cloud.dataflow.sdk.transforms.windowing.Trigger.OnceTrigger<W>

com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement<W>

com.google.cloud.dataflow.sdk.transforms.windowing.AfterProcessingTime<W>

Type Parameters:

W - BoundedWindow subclass used to represent the windows used

All Implemented Interfaces:

TriggerBuilder<W>, Serializable

@Experimental(value=TRIGGER)
public class AfterProcessingTime<W extends BoundedWindow>
extends AfterDelayFromFirstElement<W>

AfterProcessingTime triggers fire based on the current processing time. They operate in the real-time domain.

The time at which to fire the timer can be adjusted via the methods in TimeTrigger, such as TimeTrigger#plusDelayOf or TimeTrigger#alignedTo.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

Trigger.MergingTriggerInfo<W extends BoundedWindow>, Trigger.OnceTrigger<W extends BoundedWindow>, Trigger.OnElementContext, Trigger.OnMergeContext, Trigger.TriggerContext, Trigger.TriggerInfo<W extends BoundedWindow>

Field Summary

Fields inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement

DELAYED_UNTIL_TAG, IDENTITY, timestampMappers

Fields inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

subTriggers

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
protected Trigger<W>	getContinuationTrigger(List<Trigger<W>> continuationTriggers) Return the Trigger.getContinuationTrigger() of this Trigger.
Instant	getCurrentTime(Trigger.TriggerContext context) To complete an implementation, return the desired time from the TriggerContext.
Instant	getWatermarkThatGuaranteesFiring(W window) Returns a bound in watermark time by which this trigger would have fired at least once for a given window had there been input data.
int	hashCode()
protected AfterProcessingTime<W>	newWith(List<SerializableFunction<Instant,Instant>> transforms) To complete an implementation, return a new instance like this one, but incorporating the provided timestamp mapping functions.
static <W extends BoundedWindow> AfterProcessingTime<W>	pastFirstElementInPane() Creates a trigger that fires when the current processing time passes the processing time at which this trigger saw the first element in a pane.
String	toString()

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement

alignedTo, alignedTo, clear, computeTargetTimestamp, isCompatible, mappedTo, onElement, onMerge, onOnlyFiring, plusDelayOf, prefetchOnElement, prefetchOnMerge, prefetchShouldFire, shouldFire

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger.OnceTrigger

getContinuationTrigger, onFire

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

buildTrigger, orFinally, prefetchOnFire, subTriggers

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getCurrentTime

@Nullable
public Instant getCurrentTime(Trigger.TriggerContext context)

Description copied from class: AfterDelayFromFirstElement

To complete an implementation, return the desired time from the TriggerContext.

Specified by:

getCurrentTime in class AfterDelayFromFirstElement<W extends BoundedWindow>

pastFirstElementInPane

public static <W extends BoundedWindow> AfterProcessingTime<W> pastFirstElementInPane()

Creates a trigger that fires when the current processing time passes the processing time at which this trigger saw the first element in a pane.

newWith

protected AfterProcessingTime<W> newWith(List<SerializableFunction<Instant,Instant>> transforms)

Description copied from class: AfterDelayFromFirstElement

To complete an implementation, return a new instance like this one, but incorporating the provided timestamp mapping functions. Generally should be used by calling the constructor of this class from the constructor of the subclass.

Specified by:

newWith in class AfterDelayFromFirstElement<W extends BoundedWindow>

getWatermarkThatGuaranteesFiring

public Instant getWatermarkThatGuaranteesFiring(W window)

Description copied from class: Trigger

Returns a bound in watermark time by which this trigger would have fired at least once for a given window had there been input data. This is a static property of a trigger that does not depend on its state.

For triggers that do not fire based on the watermark advancing, returns BoundedWindow.TIMESTAMP_MAX_VALUE.

This estimate is used to determine that there are no elements in a side-input window, which causes the default value to be used instead.

Overrides:

getWatermarkThatGuaranteesFiring in class AfterDelayFromFirstElement<W extends BoundedWindow>

getContinuationTrigger

protected Trigger<W> getContinuationTrigger(List<Trigger<W>> continuationTriggers)

Description copied from class: Trigger

Return the Trigger.getContinuationTrigger() of this Trigger. For convenience, this is provided the continuation trigger of each of the sub-triggers.

Specified by:

getContinuationTrigger in class Trigger<W extends BoundedWindow>

toString

public String toString()

Overrides:

toString in class Trigger<W extends BoundedWindow>

equals

public boolean equals(Object obj)

Overrides:

equals in class Trigger<W extends BoundedWindow>

hashCode

public int hashCode()

Overrides:

hashCode in class Trigger<W extends BoundedWindow>