ShufflePartitioner (Flink : Runtime 2.0.0 API)

java.lang.Object
- org.apache.flink.streaming.runtime.partitioner.StreamPartitioner<T>
- - org.apache.flink.streaming.runtime.partitioner.ShufflePartitioner<T>

Type Parameters:

T - Type of the Tuple

All Implemented Interfaces:

Serializable, ChannelSelector<SerializationDelegate<StreamRecord<T>>>
```
@Internal
public class ShufflePartitioner<T>
extends StreamPartitioner<T>
```
Partitioner that distributes the data equally by selecting one output channel randomly.

See Also:

Serialized Form

Field Summary
- Fields inherited from class org.apache.flink.streaming.runtime.partitioner.StreamPartitioner
  numberOfChannels

Constructor Summary

Constructors
Constructor Description

ShufflePartitioner()

Method Summary

All Methods Instance Methods Concrete Methods
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.
`boolean`	`isPointwise()`
`int`	`selectChannel(SerializationDelegate<StreamRecord<T>> record)`	Returns the logical channel index, to which the given record should be written.
`String`	`toString()`

Methods inherited from class org.apache.flink.streaming.runtime.partitioner.StreamPartitioner
disableUnalignedCheckpoints, equals, getUpstreamSubtaskStateMapper, hashCode, isBroadcast, isSupportsUnalignedCheckpoint, setup

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ShufflePartitioner
```
public ShufflePartitioner()
```
- Method Detail
  - selectChannel
```
public int selectChannel(SerializationDelegate<StreamRecord<T>> record)
```
    Description copied from interface: ChannelSelector
    
    Returns the logical channel index, to which the given record should be written. It is illegal to call this method for broadcast channel selectors and this method can remain not implemented in that case (for example by throwing UnsupportedOperationException).
    
    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.
  - 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>
  - 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