org.apache.flink.streaming.api.transformations

Class LegacySourceTransformation<T>

java.lang.Object

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

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

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

Type Parameters:

T - The type of the elements that this source produces

All Implemented Interfaces:

WithBoundedness

@Internal
public class LegacySourceTransformation<T>
extends PhysicalTransformation<T>
implements WithBoundedness

This represents a Source. This does not actually transform anything since it has no inputs but it is the root Transformation of any topology.

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
LegacySourceTransformation(String name, StreamSource<T,?> operator, TypeInformation<T> outputType, int parallelism, Boundedness boundedness, boolean parallelismConfigured) Creates a new LegacySourceTransformation from the given operator.

Method Summary

Modifier and Type	Method and Description
Boundedness	getBoundedness() Returns the Boundedness of this Transformation.
List<Transformation<?>>	getInputs() Returns the transformations that are the immediate predecessors of the current transformation in the transformation graph.
StreamSource<T,?>	getOperator()
StreamOperatorFactory<T>	getOperatorFactory() Returns the StreamOperatorFactory of this LegacySourceTransformation.
protected List<Transformation<?>>	getTransitivePredecessorsInternal() Returns all transitive predecessor Transformations of this Transformation.
void	setBoundedness(Boundedness boundedness) Mutable for legacy sources in the Table API.
void	setChainingStrategy(ChainingStrategy strategy) Sets the chaining strategy of this Transformation.

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

isSupportsConcurrentExecutionAttempts, setSupportsConcurrentExecutionAttempts

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

LegacySourceTransformation

public LegacySourceTransformation(String name,
                                  StreamSource<T,?> operator,
                                  TypeInformation<T> outputType,
                                  int parallelism,
                                  Boundedness boundedness,
                                  boolean parallelismConfigured)

Creates a new LegacySourceTransformation from the given operator.

Parameters:

name - The name of the LegacySourceTransformation, this will be shown in Visualizations and the Log

operator - The StreamSource that is the operator of this Transformation

outputType - The type of the elements produced by this LegacySourceTransformation

parallelism - The parallelism of this LegacySourceTransformation

parallelismConfigured - If true, the parallelism of the transformation is explicitly set and should be respected. Otherwise the parallelism can be changed at runtime.

Method Detail

setBoundedness

public void setBoundedness(Boundedness boundedness)

Mutable for legacy sources in the Table API.

getBoundedness

public Boundedness getBoundedness()

Description copied from interface: WithBoundedness

Returns the Boundedness of this Transformation.

Specified by:

getBoundedness in interface WithBoundedness

getOperator

@VisibleForTesting
public StreamSource<T,?> getOperator()

getOperatorFactory

public StreamOperatorFactory<T> getOperatorFactory()

Returns the StreamOperatorFactory of this LegacySourceTransformation.

getTransitivePredecessorsInternal

protected List<Transformation<?>> getTransitivePredecessorsInternal()

Description copied from class: Transformation

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

Specified by:

getTransitivePredecessorsInternal in class Transformation<T>

Returns:

The list of transitive predecessors.

getInputs

public List<Transformation<?>> getInputs()

Description copied from class: Transformation

Returns the transformations that are the immediate predecessors of the current transformation in the transformation graph.

Specified by:

getInputs in class Transformation<T>

setChainingStrategy

public final void setChainingStrategy(ChainingStrategy strategy)

Description copied from class: PhysicalTransformation

Sets the chaining strategy of this Transformation.

Specified by:

setChainingStrategy in class PhysicalTransformation<T>