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>
Transformation
that describes a reduce operation on a KeyedStream
.bufferTimeout, id, idCounter, name, outputType, typeUsed, UPPER_BOUND_MAX_PARALLELISM
Constructor and Description |
---|
ReduceTransformation(String name,
int parallelism,
Transformation<IN> input,
ReduceFunction<IN> reducer,
KeySelector<IN,K> keySelector,
TypeInformation<K> keyTypeInfo) |
Modifier and Type | Method and Description |
---|---|
ChainingStrategy |
getChainingStrategy() |
List<Transformation<?>> |
getInputs()
Returns the
transformations that are the immediate predecessors of the
current transformation in the transformation graph. |
TypeInformation<IN> |
getInputType()
Returns the
TypeInformation for the elements of the input. |
KeySelector<IN,K> |
getKeySelector() |
TypeInformation<K> |
getKeyTypeInfo() |
ReduceFunction<IN> |
getReducer() |
List<Transformation<?>> |
getTransitivePredecessors()
Returns all transitive predecessor
Transformation s of this Transformation . |
void |
setChainingStrategy(ChainingStrategy strategy)
Sets the chaining strategy of this
Transformation . |
declareManagedMemoryUseCaseAtOperatorScope, declareManagedMemoryUseCaseAtSlotScope, equals, getBufferTimeout, getCoLocationGroupKey, getId, getManagedMemoryOperatorScopeUseCaseWeights, getManagedMemorySlotScopeUseCases, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getUid, getUserProvidedNodeHash, hashCode, setBufferTimeout, setCoLocationGroupKey, setMaxParallelism, setName, setOutputType, setParallelism, setResources, setSlotSharingGroup, setUid, setUidHash, toString, updateManagedMemoryStateBackendUseCase
public ReduceTransformation(String name, int parallelism, Transformation<IN> input, ReduceFunction<IN> reducer, KeySelector<IN,K> keySelector, TypeInformation<K> keyTypeInfo)
public void setChainingStrategy(ChainingStrategy strategy)
PhysicalTransformation
Transformation
.setChainingStrategy
in class PhysicalTransformation<IN>
public ChainingStrategy getChainingStrategy()
public KeySelector<IN,K> getKeySelector()
public TypeInformation<K> getKeyTypeInfo()
public ReduceFunction<IN> getReducer()
public TypeInformation<IN> getInputType()
TypeInformation
for the elements of the input.public List<Transformation<?>> getTransitivePredecessors()
Transformation
Transformation
s 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.getTransitivePredecessors
in class Transformation<IN>
public List<Transformation<?>> getInputs()
Transformation
transformations
that are the immediate predecessors of the
current transformation in the transformation graph.getInputs
in class Transformation<IN>
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