org.apache.flink.streaming.api.transformations

类 SourceTransformation<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.SourceTransformation<T>

类型参数:

T - The type of the elements that this source produces

@Internal
public class SourceTransformation<T>
extends PhysicalTransformation<T>

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

字段概要

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

bufferTimeout, DEFAULT_MANAGED_MEMORY_WEIGHT, id, idCounter, name, outputType, typeUsed, UPPER_BOUND_MAX_PARALLELISM

构造器概要

构造器

构造器和说明
SourceTransformation(String name, StreamOperatorFactory<T> operatorFactory, org.apache.flink.api.common.typeinfo.TypeInformation<T> outputType, int parallelism)
SourceTransformation(String name, StreamSource<T,?> operator, org.apache.flink.api.common.typeinfo.TypeInformation<T> outputType, int parallelism) Creates a new SourceTransformation from the given operator.

方法概要

限定符和类型	方法和说明
StreamSource<T,?>	getOperator()
StreamOperatorFactory<T>	getOperatorFactory() Returns the StreamOperatorFactory of this SourceTransformation.
Collection<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

equals, getBufferTimeout, getCoLocationGroupKey, getId, getManagedMemoryWeight, getMaxParallelism, getMinResources, getName, getNewNodeId, getOutputType, getParallelism, getPreferredResources, getSlotSharingGroup, getUid, getUserProvidedNodeHash, hashCode, setBufferTimeout, setCoLocationGroupKey, setManagedMemoryWeight, setMaxParallelism, setName, setOutputType, setParallelism, setResources, setSlotSharingGroup, setUid, setUidHash, toString

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

SourceTransformation

public SourceTransformation(String name,
                            StreamSource<T,?> operator,
                            org.apache.flink.api.common.typeinfo.TypeInformation<T> outputType,
                            int parallelism)

Creates a new SourceTransformation from the given operator.

参数:

name - The name of the SourceTransformation, 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 SourceTransformation

parallelism - The parallelism of this SourceTransformation

SourceTransformation

public SourceTransformation(String name,
                            StreamOperatorFactory<T> operatorFactory,
                            org.apache.flink.api.common.typeinfo.TypeInformation<T> outputType,
                            int parallelism)

方法详细资料

getOperator

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

getOperatorFactory

public StreamOperatorFactory<T> getOperatorFactory()

Returns the StreamOperatorFactory of this SourceTransformation.

getTransitivePredecessors

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

指定者:

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

setChainingStrategy

public final 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<T>