org.apache.flink.streaming.api.windowing.assigners

类 GlobalWindows.NeverTrigger

java.lang.Object

org.apache.flink.streaming.api.windowing.triggers.Trigger<Object,GlobalWindow>

org.apache.flink.streaming.api.windowing.assigners.GlobalWindows.NeverTrigger

所有已实现的接口:

Serializable

封闭类:

GlobalWindows

@Internal
public static class GlobalWindows.NeverTrigger
extends Trigger<Object,GlobalWindow>

A trigger that never fires, as default Trigger for GlobalWindows.

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.api.windowing.triggers.Trigger

Trigger.OnMergeContext, Trigger.TriggerContext

构造器概要

构造器

构造器和说明
NeverTrigger()

方法概要

限定符和类型	方法和说明
void	clear(GlobalWindow window, Trigger.TriggerContext ctx) Clears any state that the trigger might still hold for the given window.
TriggerResult	onElement(Object element, long timestamp, GlobalWindow window, Trigger.TriggerContext ctx) Called for every element that gets added to a pane.
TriggerResult	onEventTime(long time, GlobalWindow window, Trigger.TriggerContext ctx) Called when an event-time timer that was set using the trigger context fires.
void	onMerge(GlobalWindow window, Trigger.OnMergeContext ctx) Called when several windows have been merged into one window by the WindowAssigner.
TriggerResult	onProcessingTime(long time, GlobalWindow window, Trigger.TriggerContext ctx) Called when a processing-time timer that was set using the trigger context fires.

从类继承的方法 org.apache.flink.streaming.api.windowing.triggers.Trigger

canMerge

从类继承的方法 java.lang.Object

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

构造器详细资料

NeverTrigger

public NeverTrigger()

方法详细资料

onElement

public TriggerResult onElement(Object element,
                               long timestamp,
                               GlobalWindow window,
                               Trigger.TriggerContext ctx)

从类复制的说明: Trigger

Called for every element that gets added to a pane. The result of this will determine whether the pane is evaluated to emit results.

指定者:

onElement 在类中 Trigger<Object,GlobalWindow>

参数:

element - The element that arrived.

timestamp - The timestamp of the element that arrived.

window - The window to which the element is being added.

ctx - A context object that can be used to register timer callbacks.

onEventTime

public TriggerResult onEventTime(long time,
                                 GlobalWindow window,
                                 Trigger.TriggerContext ctx)

从类复制的说明: Trigger

Called when an event-time timer that was set using the trigger context fires.

指定者:

onEventTime 在类中 Trigger<Object,GlobalWindow>

参数:

time - The timestamp at which the timer fired.

window - The window for which the timer fired.

ctx - A context object that can be used to register timer callbacks.

onProcessingTime

public TriggerResult onProcessingTime(long time,
                                      GlobalWindow window,
                                      Trigger.TriggerContext ctx)

从类复制的说明: Trigger

Called when a processing-time timer that was set using the trigger context fires.

指定者:

onProcessingTime 在类中 Trigger<Object,GlobalWindow>

参数:

time - The timestamp at which the timer fired.

window - The window for which the timer fired.

ctx - A context object that can be used to register timer callbacks.

clear

public void clear(GlobalWindow window,
                  Trigger.TriggerContext ctx)
           throws Exception

从类复制的说明: Trigger

Clears any state that the trigger might still hold for the given window. This is called when a window is purged. Timers set using Trigger.TriggerContext.registerEventTimeTimer(long) and Trigger.TriggerContext.registerProcessingTimeTimer(long) should be deleted here as well as state acquired using Trigger.TriggerContext.getPartitionedState(StateDescriptor).

指定者:

clear 在类中 Trigger<Object,GlobalWindow>

抛出:

Exception

onMerge

public void onMerge(GlobalWindow window,
                    Trigger.OnMergeContext ctx)

从类复制的说明: Trigger

Called when several windows have been merged into one window by the WindowAssigner.

覆盖:

onMerge 在类中 Trigger<Object,GlobalWindow>

参数:

window - The new window that results from the merge.

ctx - A context object that can be used to register timer callbacks and access state.