Package org.apache.flink.streaming.api.transformations

Class ReduceTransformation<IN,K>

java.lang.Object

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

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

org.apache.flink.streaming.api.transformations.ReduceTransformation<IN,K>

Type Parameters:

IN - The input and output type of the transformation.

K - The type of the key of the stream.

@Internal
public final class ReduceTransformation<IN,K>
extends PhysicalTransformation<IN>

A Transformation that describes a reduce operation on a KeyedStream.

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	Description
ReduceTransformation(String name, int parallelism, org.apache.flink.api.dag.Transformation<IN> input, org.apache.flink.api.common.functions.ReduceFunction<IN> reducer, org.apache.flink.api.java.functions.KeySelector<IN,K> keySelector, org.apache.flink.api.common.typeinfo.TypeInformation<K> keyTypeInfo, boolean parallelismConfigured)

Method Summary

Modifier and Type	Method	Description
ChainingStrategy	getChainingStrategy()
List<org.apache.flink.api.dag.Transformation<?>>	getInputs()
org.apache.flink.api.common.typeinfo.TypeInformation<IN>	getInputType()	Returns the TypeInformation for the elements of the input.
org.apache.flink.api.java.functions.KeySelector<IN,K>	getKeySelector()
org.apache.flink.api.common.typeinfo.TypeInformation<K>	getKeyTypeInfo()
org.apache.flink.api.common.functions.ReduceFunction<IN>	getReducer()
protected List<org.apache.flink.api.dag.Transformation<?>>	getTransitivePredecessorsInternal()
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, getAttribute, getBufferTimeout, getCoLocationGroupKey, getDescription, getId, getManagedMemoryOperatorScopeUseCaseWeights, getManagedMemorySlotScopeUseCases, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getTransitivePredecessors, getUid, getUserProvidedNodeHash, hashCode, isParallelismConfigured, setAttribute, 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

ReduceTransformation

public ReduceTransformation(String name,
                            int parallelism,
                            org.apache.flink.api.dag.Transformation<IN> input,
                            org.apache.flink.api.common.functions.ReduceFunction<IN> reducer,
                            org.apache.flink.api.java.functions.KeySelector<IN,K> keySelector,
                            org.apache.flink.api.common.typeinfo.TypeInformation<K> keyTypeInfo,
                            boolean parallelismConfigured)

Method Detail

setChainingStrategy

public void setChainingStrategy(ChainingStrategy strategy)

Description copied from class: PhysicalTransformation

Sets the chaining strategy of this Transformation.

Specified by:

setChainingStrategy in class PhysicalTransformation<IN>

getChainingStrategy

public ChainingStrategy getChainingStrategy()

getKeySelector

public org.apache.flink.api.java.functions.KeySelector<IN,K> getKeySelector()

getKeyTypeInfo

public org.apache.flink.api.common.typeinfo.TypeInformation<K> getKeyTypeInfo()

getReducer

public org.apache.flink.api.common.functions.ReduceFunction<IN> getReducer()

getInputType

public org.apache.flink.api.common.typeinfo.TypeInformation<IN> getInputType()

Returns the TypeInformation for the elements of the input.

getTransitivePredecessorsInternal

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

Specified by:

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

getInputs

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

Specified by:

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