org.apache.flink.streaming.api.transformations

类 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>

类型参数:

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.

字段概要

从类继承的字段 org.apache.flink.api.dag.Transformation

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

构造器概要

构造器

构造器和说明
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)

方法概要

限定符和类型	方法和说明
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()
List<org.apache.flink.api.dag.Transformation<?>>	getTransitivePredecessors()
void	setChainingStrategy(ChainingStrategy strategy) Sets the chaining strategy of this Transformation.

从类继承的方法 org.apache.flink.api.dag.Transformation

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

从类继承的方法 java.lang.Object

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

构造器详细资料

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)

方法详细资料

setChainingStrategy

public void setChainingStrategy(ChainingStrategy strategy)

从类复制的说明: PhysicalTransformation

Sets the chaining strategy of this Transformation.

指定者:

setChainingStrategy 在类中 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.

getTransitivePredecessors

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

指定者:

getTransitivePredecessors 在类中 org.apache.flink.api.dag.Transformation<IN>

getInputs

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

指定者:

getInputs 在类中 org.apache.flink.api.dag.Transformation<IN>