Package org.apache.beam.sdk.transforms.windowing

Class AfterSynchronizedProcessingTime

java.lang.Object

org.apache.beam.sdk.transforms.windowing.Trigger

org.apache.beam.sdk.transforms.windowing.Trigger.OnceTrigger

org.apache.beam.sdk.transforms.windowing.AfterSynchronizedProcessingTime

All Implemented Interfaces:

Serializable

public class AfterSynchronizedProcessingTime
extends Trigger.OnceTrigger

FOR INTERNAL USE ONLY. A trigger that fires after synchronized processing time has reached the processing time of the first element's arrival.

This is for internal, primarily as a "continuation trigger" for AfterProcessingTime triggers. In that use, this trigger is ready as soon as all upstream workers processing time clocks have caught up to the moment that input arrived.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.beam.sdk.transforms.windowing.Trigger

Trigger.OnceTrigger

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.windowing.Trigger

subTriggers

Method Summary

Modifier and Type	Method	Description
boolean	equals(@Nullable Object obj)
protected Trigger	getContinuationTrigger(List<Trigger> continuationTriggers)	Subclasses should override this to return the Trigger.getContinuationTrigger() of this Trigger.
Instant	getWatermarkThatGuaranteesFiring(BoundedWindow window)	For internal use only; no backwards-compatibility guarantees.
int	hashCode()
static AfterSynchronizedProcessingTime	ofFirstElement()
String	toString()

Methods inherited from class org.apache.beam.sdk.transforms.windowing.Trigger.OnceTrigger

getContinuationTrigger, mayFinish

Methods inherited from class org.apache.beam.sdk.transforms.windowing.Trigger

isCompatible, orFinally, subTriggers

Methods inherited from class java.lang.Object

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

Method Details

ofFirstElement

public static AfterSynchronizedProcessingTime ofFirstElement()

getWatermarkThatGuaranteesFiring

public Instant getWatermarkThatGuaranteesFiring(BoundedWindow window)

Description copied from class: Trigger

For internal use only; no backwards-compatibility guarantees.

Returns a bound in event time by which this trigger would have fired at least once for a given window had there been input data.

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

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

Specified by:

getWatermarkThatGuaranteesFiring in class Trigger

getContinuationTrigger

protected Trigger getContinuationTrigger(List<Trigger> continuationTriggers)

Description copied from class: Trigger

Subclasses should override this to return the Trigger.getContinuationTrigger() of this Trigger. For convenience, this is provided the continuation trigger of each of the sub-triggers in the same order as Trigger.subTriggers.

Specified by:

getContinuationTrigger in class Trigger

Parameters:

continuationTriggers - contains the result of Trigger.getContinuationTrigger() on each of the subTriggers in the same order.

toString

public String toString()

Overrides:

toString in class Trigger

equals

public boolean equals(@Nullable Object obj)

Overrides:

equals in class Trigger

hashCode

public int hashCode()

Overrides:

hashCode in class Trigger