org.apache.flink.streaming.runtime.operators.windowing

Class EvictingWindowOperator<K,IN,OUT,W extends Window>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,WindowFunction<IN,OUT,K,W>>

org.apache.flink.streaming.runtime.operators.windowing.WindowOperator<K,IN,OUT,W>

org.apache.flink.streaming.runtime.operators.windowing.EvictingWindowOperator<K,IN,OUT,W>

Type Parameters:

K - The type of key returned by the KeySelector.

IN - The type of the incoming elements.

OUT - The type of elements emitted by the WindowFunction.

W - The type of Window that the WindowAssigner assigns.

All Implemented Interfaces:

Serializable, org.apache.flink.api.java.typeutils.InputTypeConfigurable, OneInputStreamOperator<IN,OUT>, OutputTypeConfigurable<OUT>, StreamOperator<OUT>, Triggerable

public class EvictingWindowOperator<K,IN,OUT,W extends Window>
extends WindowOperator<K,IN,OUT,W>

A WindowOperator that also allows an Evictor to be used.

The Evictor is used to evict elements from panes before processing a window and after a Trigger has fired.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.runtime.operators.windowing.WindowOperator

WindowOperator.Context

Field Summary

Fields inherited from class org.apache.flink.streaming.runtime.operators.windowing.WindowOperator

currentWatermark, timestampedCollector, windows

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

userFunction

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, output

Constructor Summary

Constructors

Constructor and Description

EvictingWindowOperator(WindowAssigner<? super IN,W> windowAssigner, TypeSerializer<W> windowSerializer, org.apache.flink.api.java.functions.KeySelector<IN,K> keySelector, TypeSerializer<K> keySerializer, WindowBufferFactory<? super IN,? extends EvictingWindowBuffer<IN>> windowBufferFactory, WindowFunction<IN,OUT,K,W> windowFunction, Trigger<? super IN,? super W> trigger, Evictor<? super IN,? super W> evictor)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	emitWindow(WindowOperator.Context context)
EvictingWindowOperator<K,IN,OUT,W>	enableSetProcessingTime(boolean setProcessingTime) When this flag is enabled the current processing time is set as the timestamp of elements upon arrival.
Evictor<? super IN,? super W>	getEvictor()

Methods inherited from class org.apache.flink.streaming.runtime.operators.windowing.WindowOperator

close, getKeySelector, getTrigger, getWindowAssigner, getWindowBufferFactory, isSetProcessingTime, open, processElement, processWatermark, restoreState, setInputType, snapshotOperatorState, trigger

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

dispose, getUserFunction, getUserFunctionParameters, notifyOfCompletedCheckpoint, setOutputType, setup

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

createKeyValueState, createKeyValueState, disableInputCopy, getChainingStrategy, getContainingTask, getExecutionConfig, getOperatorConfig, getRuntimeContext, getStateBackend, getUserCodeClassloader, isInputCopyingDisabled, registerTimer, setChainingStrategy, setKeyContext, setKeyContextElement

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

dispose, getChainingStrategy, isInputCopyingDisabled, notifyOfCompletedCheckpoint, setChainingStrategy, setKeyContextElement, setup

Constructor Detail

EvictingWindowOperator

public EvictingWindowOperator(WindowAssigner<? super IN,W> windowAssigner,
                      TypeSerializer<W> windowSerializer,
                      org.apache.flink.api.java.functions.KeySelector<IN,K> keySelector,
                      TypeSerializer<K> keySerializer,
                      WindowBufferFactory<? super IN,? extends EvictingWindowBuffer<IN>> windowBufferFactory,
                      WindowFunction<IN,OUT,K,W> windowFunction,
                      Trigger<? super IN,? super W> trigger,
                      Evictor<? super IN,? super W> evictor)

Method Detail

emitWindow

protected void emitWindow(WindowOperator.Context context)
                   throws Exception

Overrides:

emitWindow in class WindowOperator<K,IN,OUT,W extends Window>

Throws:

Exception

enableSetProcessingTime

public EvictingWindowOperator<K,IN,OUT,W> enableSetProcessingTime(boolean setProcessingTime)

Description copied from class: WindowOperator

When this flag is enabled the current processing time is set as the timestamp of elements upon arrival. This must be used, for example, when using the TimeEvictor with processing time semantics.

Overrides:

enableSetProcessingTime in class WindowOperator<K,IN,OUT,W extends Window>

getEvictor

public Evictor<? super IN,? super W> getEvictor()