org.apache.flink.streaming.runtime.io

Class StreamTwoInputProcessor<IN1,IN2>

java.lang.Object

org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor<IN1,IN2>

Type Parameters:

IN1 - The type of the records that arrive on the first input

IN2 - The type of the records that arrive on the second input

All Implemented Interfaces:

Closeable, AutoCloseable, AvailabilityProvider, StreamInputProcessor

@Internal
public final class StreamTwoInputProcessor<IN1,IN2>
extends Object
implements StreamInputProcessor

Input reader for TwoInputStreamTask.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

AvailabilityProvider.AvailabilityHelper

Field Summary

Fields inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

AVAILABLE

Constructor Summary

Constructors

Constructor and Description
StreamTwoInputProcessor(TwoInputSelectionHandler inputSelectionHandler, StreamOneInputProcessor<IN1> processor1, StreamOneInputProcessor<IN2> processor2)

Method Summary

Modifier and Type	Method and Description
void	close()
CompletableFuture<?>	getAvailableFuture()
CompletableFuture<Void>	prepareSnapshot(ChannelStateWriter channelStateWriter, long checkpointId)
InputStatus	processInput() In case of two and more input processors this method must call InputSelectable.nextSelection() to choose which input to consume from next.

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.runtime.io.AvailabilityProvider

and, isApproximatelyAvailable, isAvailable, or

Constructor Detail

StreamTwoInputProcessor

public StreamTwoInputProcessor(TwoInputSelectionHandler inputSelectionHandler,
                               StreamOneInputProcessor<IN1> processor1,
                               StreamOneInputProcessor<IN2> processor2)

Method Detail

getAvailableFuture

public CompletableFuture<?> getAvailableFuture()

Specified by:

getAvailableFuture in interface AvailabilityProvider

Returns:

a future that is completed if the respective provider is available.

processInput

public InputStatus processInput()
                         throws Exception

Description copied from interface: StreamInputProcessor

In case of two and more input processors this method must call InputSelectable.nextSelection() to choose which input to consume from next.

Specified by:

processInput in interface StreamInputProcessor

Returns:

input status to estimate whether more records can be processed immediately or not. If there are no more records available at the moment and the caller should check finished state and/or AvailabilityProvider.getAvailableFuture().

Throws:

Exception

prepareSnapshot

public CompletableFuture<Void> prepareSnapshot(ChannelStateWriter channelStateWriter,
                                               long checkpointId)
                                        throws IOException

Specified by:

prepareSnapshot in interface StreamInputProcessor

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException