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

Class SubtaskConnectionDescriptor

java.lang.Object

org.apache.flink.runtime.event.AbstractEvent

org.apache.flink.runtime.event.RuntimeEvent

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

All Implemented Interfaces:

IOReadableWritable

public final class SubtaskConnectionDescriptor
extends RuntimeEvent

An event that is used to (de)multiplex old channels over the same new channel.

During unaligned checkpoint recovery, if there is a rescaling, channels from the previous run may not be available anymore for restoring the data. In that case, the data of several old channels is sent over the same new channel through multiplexing. Each buffer is following this SubtaskConnectionDescriptor such that the receiver can demultiplex them.

Constructor Summary

Constructors

Constructor and Description
SubtaskConnectionDescriptor(int inputSubtaskIndex, int outputSubtaskIndex)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getInputSubtaskIndex()
int	getOutputSubtaskIndex()
int	hashCode()
void	read(DataInputView in) Reads the object's internal data from the given data input view.
String	toString()
void	write(DataOutputView out) Writes the object's internal data to the given data output view.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SubtaskConnectionDescriptor

public SubtaskConnectionDescriptor(int inputSubtaskIndex,
                                   int outputSubtaskIndex)

Method Detail

write

public void write(DataOutputView out)

Description copied from interface: IOReadableWritable

Writes the object's internal data to the given data output view.

Parameters:

out - the output view to receive the data.

read

public void read(DataInputView in)

Description copied from interface: IOReadableWritable

Reads the object's internal data from the given data input view.

Parameters:

in - the input view to read the data from

getInputSubtaskIndex

public int getInputSubtaskIndex()

getOutputSubtaskIndex

public int getOutputSubtaskIndex()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object