org.apache.flink.streaming.api.transformations

Class PartitionTransformation<T>

java.lang.Object

org.apache.flink.streaming.api.transformations.StreamTransformation<T>

org.apache.flink.streaming.api.transformations.PartitionTransformation<T>

Type Parameters:

T - The type of the elements that result from this PartitionTransformation

@Internal
public class PartitionTransformation<T>
extends StreamTransformation<T>

This transformation represents a change of partitioning of the input elements.

This does not create a physical operation, it only affects how upstream operations are connected to downstream operations.

Field Summary

Fields inherited from class org.apache.flink.streaming.api.transformations.StreamTransformation

bufferTimeout, id, idCounter, name, outputType, typeUsed

Constructor Summary

Constructors

Constructor and Description
PartitionTransformation(StreamTransformation<T> input, StreamPartitioner<T> partitioner) Creates a new PartitionTransformation from the given input and StreamPartitioner.

Method Summary

Modifier and Type	Method and Description
StreamTransformation<T>	getInput() Returns the input StreamTransformation of this SinkTransformation.
StreamPartitioner<T>	getPartitioner() Returns the StreamPartitioner that must be used for partitioning the elements of the input StreamTransformation.
Collection<StreamTransformation<?>>	getTransitivePredecessors() Returns all transitive predecessor StreamTransformations of this StreamTransformation.
void	setChainingStrategy(ChainingStrategy strategy) Sets the chaining strategy of this StreamTransformation.

Methods inherited from class org.apache.flink.streaming.api.transformations.StreamTransformation

equals, getBufferTimeout, getCoLocationGroupKey, getId, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getUid, getUserProvidedNodeHash, hashCode, setBufferTimeout, setCoLocationGroupKey, setMaxParallelism, setName, setOutputType, setParallelism, setResources, setSlotSharingGroup, setUid, setUidHash, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionTransformation

public PartitionTransformation(StreamTransformation<T> input,
                               StreamPartitioner<T> partitioner)

Creates a new PartitionTransformation from the given input and StreamPartitioner.

Parameters:

input - The input StreamTransformation

partitioner - The StreamPartitioner

Method Detail

getInput

public StreamTransformation<T> getInput()

Returns the input StreamTransformation of this SinkTransformation.

getPartitioner

public StreamPartitioner<T> getPartitioner()

Returns the StreamPartitioner that must be used for partitioning the elements of the input StreamTransformation.

getTransitivePredecessors

public Collection<StreamTransformation<?>> getTransitivePredecessors()

Description copied from class: StreamTransformation

Returns all transitive predecessor StreamTransformations of this StreamTransformation. This is, for example, used when determining whether a feedback edge of an iteration actually has the iteration head as a predecessor.

Specified by:

getTransitivePredecessors in class StreamTransformation<T>

Returns:

The list of transitive predecessors.

setChainingStrategy

public final void setChainingStrategy(ChainingStrategy strategy)

Description copied from class: StreamTransformation

Sets the chaining strategy of this StreamTransformation.

Specified by:

setChainingStrategy in class StreamTransformation<T>