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,InternalWindowFunction<ACC,OUT,K,W>>

org.apache.flink.streaming.runtime.operators.windowing.WindowOperator<K,IN,Iterable<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 InternalWindowFunction.

W - The type of Window that the WindowAssigner assigns.

All Implemented Interfaces:

Serializable, InputTypeConfigurable, OneInputStreamOperator<IN,OUT>, OutputTypeConfigurable<OUT>, StreamOperator<OUT>, Triggerable

@Internal
public class EvictingWindowOperator<K,IN,OUT,W extends Window>
extends WindowOperator<K,IN,Iterable<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, WindowOperator.Timer<K,W extends Window>

Field Summary

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

context, currentWatermark, inputSerializer, keySelector, keySerializer, processingTimeTimers, processingTimeTimersQueue, timestampedCollector, trigger, watermarkTimers, watermarkTimersQueue, windowAssigner, windowSerializer

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

userFunction

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

chainingStrategy, LOG, output

Constructor Summary

Constructors

Constructor and Description
EvictingWindowOperator(WindowAssigner<? super IN,W> windowAssigner, TypeSerializer<W> windowSerializer, KeySelector<IN,K> keySelector, TypeSerializer<K> keySerializer, StateDescriptor<? extends ListState<StreamRecord<IN>>,?> windowStateDescriptor, InternalWindowFunction<Iterable<IN>,OUT,K,W> windowFunction, Trigger<? super IN,? super W> trigger, Evictor<? super IN,? super W> evictor)

Method Summary

Modifier and Type	Method and Description
Evictor<? super IN,? super W>	getEvictor()
StateDescriptor<? extends MergingState<IN,Iterable<IN>>,?>	getStateDescriptor()
void	processElement(StreamRecord<IN> element) Processes one element that arrived at this operator.
protected void	processTriggerResult(TriggerResult triggerResult, K key, W window)

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

close, getKeySelector, getTrigger, getWindowAssigner, open, 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

disableInputCopy, getChainingStrategy, getContainingTask, getExecutionConfig, getOperatorConfig, getPartitionedState, getPartitionedState, getRuntimeContext, getStateBackend, getUserCodeClassloader, isInputCopyingDisabled, registerTimer, setChainingStrategy, setKeyContext, setKeyContextElement1, setKeyContextElement2

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, setKeyContextElement1, setKeyContextElement2, setup

Constructor Detail

EvictingWindowOperator

public EvictingWindowOperator(WindowAssigner<? super IN,W> windowAssigner,
                              TypeSerializer<W> windowSerializer,
                              KeySelector<IN,K> keySelector,
                              TypeSerializer<K> keySerializer,
                              StateDescriptor<? extends ListState<StreamRecord<IN>>,?> windowStateDescriptor,
                              InternalWindowFunction<Iterable<IN>,OUT,K,W> windowFunction,
                              Trigger<? super IN,? super W> trigger,
                              Evictor<? super IN,? super W> evictor)

Method Detail

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

Description copied from interface: OneInputStreamOperator

Processes one element that arrived at this operator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement in interface OneInputStreamOperator<IN,OUT>

Overrides:

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

Throws:

Exception

processTriggerResult

protected void processTriggerResult(TriggerResult triggerResult,
                                    K key,
                                    W window)
                             throws Exception

Overrides:

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

Throws:

Exception

getEvictor

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

getStateDescriptor

public StateDescriptor<? extends MergingState<IN,Iterable<IN>>,?> getStateDescriptor()

Overrides:

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