org.apache.flink.streaming.api.transformations

Class SourceTransformationWrapper<T>

java.lang.Object

org.apache.flink.api.dag.Transformation<T>

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

Type Parameters:

T - The type of the elements in the input Transformation

@Internal
public class SourceTransformationWrapper<T>
extends org.apache.flink.api.dag.Transformation<T>

This Transformation is a phantom transformation which is used to expose a default parallelism to downstream.

It is used only when the parallelism of the source transformation differs from the default parallelism, ensuring that the parallelism of downstream operations is not affected.

Moreover, this transformation does not have a corresponding TransformationTranslator, meaning it will not become a node in the StreamGraph.

Field Summary

Fields inherited from class org.apache.flink.api.dag.Transformation

bufferTimeout, description, id, name, outputType, typeUsed, UPPER_BOUND_MAX_PARALLELISM

Constructor Summary

Constructors

Constructor and Description
SourceTransformationWrapper(org.apache.flink.api.dag.Transformation<T> input)

Method Summary

Modifier and Type	Method and Description
org.apache.flink.api.dag.Transformation<T>	getInput()
List<org.apache.flink.api.dag.Transformation<?>>	getInputs()
protected List<org.apache.flink.api.dag.Transformation<?>>	getTransitivePredecessorsInternal()

Methods inherited from class org.apache.flink.api.dag.Transformation

declareManagedMemoryUseCaseAtOperatorScope, declareManagedMemoryUseCaseAtSlotScope, equals, getBufferTimeout, getCoLocationGroupKey, getDescription, getId, getManagedMemoryOperatorScopeUseCaseWeights, getManagedMemorySlotScopeUseCases, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getTransitivePredecessors, getUid, getUserProvidedNodeHash, hashCode, isParallelismConfigured, setBufferTimeout, setCoLocationGroupKey, setDescription, setMaxParallelism, setName, setOutputType, setParallelism, setParallelism, setResources, setSlotSharingGroup, setSlotSharingGroup, setUid, setUidHash, toString, updateManagedMemoryStateBackendUseCase

Methods inherited from class java.lang.Object

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

Constructor Detail

SourceTransformationWrapper

public SourceTransformationWrapper(org.apache.flink.api.dag.Transformation<T> input)

Method Detail

getInput

public org.apache.flink.api.dag.Transformation<T> getInput()

getTransitivePredecessorsInternal

protected List<org.apache.flink.api.dag.Transformation<?>> getTransitivePredecessorsInternal()

Specified by:

getTransitivePredecessorsInternal in class org.apache.flink.api.dag.Transformation<T>

getInputs

public List<org.apache.flink.api.dag.Transformation<?>> getInputs()

Specified by:

getInputs in class org.apache.flink.api.dag.Transformation<T>