org.apache.flink.table.runtime.operators.window.groupwindow.triggers

Class WindowTrigger<W extends Window>

java.lang.Object

org.apache.flink.table.runtime.operators.window.groupwindow.triggers.Trigger<W>

org.apache.flink.table.runtime.operators.window.groupwindow.triggers.WindowTrigger<W>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

EventTimeTriggers.AfterEndOfWindow, EventTimeTriggers.AfterEndOfWindowEarlyAndLate, EventTimeTriggers.AfterEndOfWindowNoLate, ProcessingTimeTriggers.AfterEndOfWindow, ProcessingTimeTriggers.AfterEndOfWindowNoLate, ProcessingTimeTriggers.AfterFirstElementPeriodic

@Internal
public abstract class WindowTrigger<W extends Window>
extends Trigger<W>

A WindowTrigger determines when a window should be evaluated to emit the results.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.window.groupwindow.triggers.Trigger

Trigger.OnMergeContext, Trigger.TriggerContext

Field Summary

Fields

Modifier and Type	Field and Description
protected Trigger.TriggerContext	ctx The TriggerContext of the window trigger.

Constructor Summary

Constructors

Constructor and Description
WindowTrigger()

Method Summary

Modifier and Type	Method and Description
protected long	triggerTime(W window) Returns the trigger time of the window, this should be called after TriggerContext initialized.

Methods inherited from class org.apache.flink.table.runtime.operators.window.groupwindow.triggers.Trigger

canMerge, clear, onElement, onEventTime, onMerge, onProcessingTime, open

Methods inherited from class java.lang.Object

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

Field Detail

ctx

protected transient Trigger.TriggerContext ctx

The TriggerContext of the window trigger.

Constructor Detail

WindowTrigger

public WindowTrigger()

Method Detail

triggerTime

protected long triggerTime(W window)

Returns the trigger time of the window, this should be called after TriggerContext initialized.