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

类 ProcessingTimeTriggers

java.lang.Object

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

public class ProcessingTimeTriggers
extends Object

A Trigger that reacts to processing-time timers. The behavior can be one of the following:

• fire when the processing time passes the end of the window (afterEndOfWindow()),
• fire when the processing time advances by a certain interval after reception of the first element after the last firing for a given window (every(Duration)).

In the first case, the trigger can also specify an early trigger. The early trigger will be responsible for specifying when the trigger should fire in the period between the beginning of the window and the time when the processing time passes the end of the window.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ProcessingTimeTriggers.AfterEndOfWindow<W extends Window> A Trigger that fires once the current system time passes the end of the window to which a pane belongs.
static class	ProcessingTimeTriggers.AfterEndOfWindowNoLate<W extends Window> A composite Trigger that consist of AfterEndOfWindow and a early trigger.
static class	ProcessingTimeTriggers.AfterFirstElementPeriodic<W extends Window> Trigger every a given interval, the first trigger time is interval after the first element in the pane.

方法概要

限定符和类型	方法和说明
static <W extends Window> ProcessingTimeTriggers.AfterEndOfWindow<W>	afterEndOfWindow() Creates a trigger that fires when the processing time passes the end of the window.
static <W extends Window> ProcessingTimeTriggers.AfterFirstElementPeriodic<W>	every(java.time.Duration time) Creates a trigger that fires by a certain interval after reception of the first element.

从类继承的方法 java.lang.Object

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

方法详细资料

afterEndOfWindow

public static <W extends Window> ProcessingTimeTriggers.AfterEndOfWindow<W> afterEndOfWindow()

Creates a trigger that fires when the processing time passes the end of the window.

every

public static <W extends Window> ProcessingTimeTriggers.AfterFirstElementPeriodic<W> every(java.time.Duration time)

Creates a trigger that fires by a certain interval after reception of the first element.

参数:

time - the certain interval