org.apache.flink.runtime.io.network.api.writer

Class ResultPartitionWriter

java.lang.Object

org.apache.flink.runtime.io.network.api.writer.ResultPartitionWriter

All Implemented Interfaces:

EventListener<TaskEvent>

public class ResultPartitionWriter
extends Object
implements EventListener<TaskEvent>

A buffer-oriented runtime result writer.

The ResultPartitionWriter is the runtime API for producing results. It supports two kinds of data to be sent: buffers and events.

Constructor Summary

Constructors

Constructor and Description
ResultPartitionWriter(ResultPartition partition)

Method Summary

Methods

Modifier and Type	Method and Description
BufferProvider	getBufferProvider()
int	getNumberOfOutputChannels()
int	getNumTargetKeyGroups()
ResultPartitionID	getPartitionId()
void	onEvent(TaskEvent event)
void	subscribeToEvent(EventListener<TaskEvent> eventListener, Class<? extends TaskEvent> eventType)
void	writeBuffer(Buffer buffer, int targetChannel)
void	writeBufferToAllChannels(Buffer eventBuffer) Writes the given buffer to all available target channels.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultPartitionWriter

public ResultPartitionWriter(ResultPartition partition)

Method Detail

getPartitionId

public ResultPartitionID getPartitionId()

getBufferProvider

public BufferProvider getBufferProvider()

getNumberOfOutputChannels

public int getNumberOfOutputChannels()

getNumTargetKeyGroups

public int getNumTargetKeyGroups()

writeBuffer

public void writeBuffer(Buffer buffer,
               int targetChannel)
                 throws IOException

Throws:

IOException

writeBufferToAllChannels

public void writeBufferToAllChannels(Buffer eventBuffer)
                              throws IOException

Writes the given buffer to all available target channels. The buffer is taken over and used for each of the channels. It will be recycled afterwards.

Parameters:

eventBuffer - the buffer to write

Throws:

IOException

subscribeToEvent

public void subscribeToEvent(EventListener<TaskEvent> eventListener,
                    Class<? extends TaskEvent> eventType)

onEvent

public void onEvent(TaskEvent event)

Specified by:

onEvent in interface EventListener<TaskEvent>