org.apache.flink.runtime.io.network.netty

Class NettyPartitionRequestClient

java.lang.Object

org.apache.flink.runtime.io.network.netty.NettyPartitionRequestClient

All Implemented Interfaces:

PartitionRequestClient

public class NettyPartitionRequestClient
extends Object
implements PartitionRequestClient

Partition request client for remote partition requests.

This client is shared by all remote input channels, which request a partition from the same ConnectionID.

Method Summary

Modifier and Type	Method and Description
void	close(RemoteInputChannel inputChannel) Cancels the partition request for the given remote input channel and removes this client from factory if it is not referenced by any other input channels.
void	notifyCreditAvailable(RemoteInputChannel inputChannel) Notifies available credits from one remote input channel.
void	requestSubpartition(ResultPartitionID partitionId, int subpartitionIndex, RemoteInputChannel inputChannel, int delayMs) Requests a remote intermediate result partition queue.
void	sendTaskEvent(ResultPartitionID partitionId, TaskEvent event, RemoteInputChannel inputChannel) Sends a task event backwards to an intermediate result partition producer.

Methods inherited from class java.lang.Object

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

Method Detail

requestSubpartition

public void requestSubpartition(ResultPartitionID partitionId,
                                int subpartitionIndex,
                                RemoteInputChannel inputChannel,
                                int delayMs)
                         throws IOException

Requests a remote intermediate result partition queue.

The request goes to the remote producer, for which this partition request client instance has been created.

Specified by:

requestSubpartition in interface PartitionRequestClient

Parameters:

partitionId - The identifier of result partition to be requested.

subpartitionIndex - The sub partition index in the requested result partition.

inputChannel - The remote input channel for requesting the sub partition.

delayMs - The request is scheduled within a delay time.

Throws:

IOException

sendTaskEvent

public void sendTaskEvent(ResultPartitionID partitionId,
                          TaskEvent event,
                          RemoteInputChannel inputChannel)
                   throws IOException

Sends a task event backwards to an intermediate result partition producer.

Backwards task events flow between readers and writers and therefore will only work when both are running at the same time, which is only guaranteed to be the case when both the respective producer and consumer task run pipelined.

Specified by:

sendTaskEvent in interface PartitionRequestClient

Parameters:

partitionId - The identifier of result partition.

event - The task event to be sent.

inputChannel - The remote input channel for sending this event.

Throws:

IOException

notifyCreditAvailable

public void notifyCreditAvailable(RemoteInputChannel inputChannel)

Description copied from interface: PartitionRequestClient

Notifies available credits from one remote input channel.

Specified by:

notifyCreditAvailable in interface PartitionRequestClient

Parameters:

inputChannel - The remote input channel who announces the available credits.

close

public void close(RemoteInputChannel inputChannel)
           throws IOException

Description copied from interface: PartitionRequestClient

Cancels the partition request for the given remote input channel and removes this client from factory if it is not referenced by any other input channels.

Specified by:

close in interface PartitionRequestClient

Parameters:

inputChannel - The remote input channel for canceling partition and to be removed from network stack.

Throws:

IOException