Package org.apache.flink.streaming.runtime.partitioner

Class BroadcastPartitioner<T>

java.lang.Object

org.apache.flink.streaming.runtime.partitioner.StreamPartitioner<T>

org.apache.flink.streaming.runtime.partitioner.BroadcastPartitioner<T>

Type Parameters:

T - Type of the elements in the Stream being broadcast

All Implemented Interfaces:

Serializable, ChannelSelector<SerializationDelegate<StreamRecord<T>>>

@Internal
public class BroadcastPartitioner<T>
extends StreamPartitioner<T>

Partitioner that selects all the output channels.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.runtime.partitioner.StreamPartitioner

numberOfChannels

Constructor Summary

Constructors

Constructor	Description
BroadcastPartitioner()

Method Summary

Modifier and Type	Method	Description
StreamPartitioner<T>	copy()
SubtaskStateMapper	getDownstreamSubtaskStateMapper()	Defines the behavior of this partitioner, when downstream rescaled during recovery of in-flight data.
SubtaskStateMapper	getUpstreamSubtaskStateMapper()	Defines the behavior of this partitioner, when upstream rescaled during recovery of in-flight data.
boolean	isBroadcast()	Returns whether the channel selector always selects all the output channels.
boolean	isPointwise()
int	selectChannel(SerializationDelegate<StreamRecord<T>> record)	Note: Broadcast mode could be handled directly for all the output channels in record writer, so it is no need to select channels via this method.
String	toString()

Methods inherited from class org.apache.flink.streaming.runtime.partitioner.StreamPartitioner

disableUnalignedCheckpoints, equals, hashCode, isSupportsUnalignedCheckpoint, setup

Methods inherited from class java.lang.Object

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

Constructor Details

BroadcastPartitioner

public BroadcastPartitioner()

Method Details

selectChannel

public int selectChannel(SerializationDelegate<StreamRecord<T>> record)

Note: Broadcast mode could be handled directly for all the output channels in record writer, so it is no need to select channels via this method.

Parameters:

record - the record to determine the output channels for.

Returns:

an integer number which indicates the index of the output channel through which the record shall be forwarded.

getUpstreamSubtaskStateMapper

public SubtaskStateMapper getUpstreamSubtaskStateMapper()

Description copied from class: StreamPartitioner

Defines the behavior of this partitioner, when upstream rescaled during recovery of in-flight data.

Overrides:

getUpstreamSubtaskStateMapper in class StreamPartitioner<T>

getDownstreamSubtaskStateMapper

public SubtaskStateMapper getDownstreamSubtaskStateMapper()

Description copied from class: StreamPartitioner

Defines the behavior of this partitioner, when downstream rescaled during recovery of in-flight data.

Specified by:

getDownstreamSubtaskStateMapper in class StreamPartitioner<T>

isBroadcast

public boolean isBroadcast()

Description copied from interface: ChannelSelector

Returns whether the channel selector always selects all the output channels.

Specified by:

isBroadcast in interface ChannelSelector<T>

Overrides:

isBroadcast in class StreamPartitioner<T>

Returns:

true if the selector is for broadcast mode.

copy

public StreamPartitioner<T> copy()

Specified by:

copy in class StreamPartitioner<T>

isPointwise

public boolean isPointwise()

Specified by:

isPointwise in class StreamPartitioner<T>

toString

public String toString()

Overrides:

toString in class Object