Package org.apache.flink.streaming.api.operators

Interface StreamOperatorFactory<OUT>

Type Parameters:

OUT - The output type of the operator

All Superinterfaces:

Serializable

All Known Subinterfaces:

CoordinatedOperatorFactory<OUT>, InputFormatOperatorFactory<OUT>, OneInputStreamOperatorFactory<IN,OUT>, OutputFormatOperatorFactory<IN,OUT>, TwoInputStreamOperatorFactory<IN1,IN2,OUT>, UdfStreamOperatorFactory<OUT>, YieldingOperatorFactory<OUT>

All Known Implementing Classes:

AbstractStreamOperatorFactory, CollectSinkOperatorFactory, CommitterOperatorFactory, ContinuousFileReaderOperatorFactory, EvictingWindowOperatorFactory, SimpleInputFormatOperatorFactory, SimpleOperatorFactory, SimpleOutputFormatOperatorFactory, SimpleUdfStreamOperatorFactory, SinkWriterOperatorFactory, SourceOperatorFactory, TimestampsAndWatermarksOperatorFactory, WindowOperatorFactory

@PublicEvolving
public interface StreamOperatorFactory<OUT>
extends Serializable

A factory to create StreamOperator.

Method Summary

Modifier and Type	Method	Description
<T extends StreamOperator<OUT>> T	createStreamOperator(StreamOperatorParameters<OUT> parameters)	Create the operator.
ChainingStrategy	getChainingStrategy()	Get the chaining strategy of operator factory.
default OperatorAttributes	getOperatorAttributes()	Is called to get the OperatorAttributes of the operator.
Class<? extends StreamOperator>	getStreamOperatorClass(ClassLoader classLoader)	Returns the runtime class of the stream operator.
default boolean	isInputTypeConfigurable()	If the stream operator need to be configured with the data type they will operate on.
default boolean	isLegacySource()
default boolean	isOutputTypeConfigurable()	If the stream operator need access to the output type information at StreamGraph generation.
default boolean	isStreamSource()	Is this factory for StreamSource.
void	setChainingStrategy(ChainingStrategy strategy)	Set the chaining strategy for operator factory.
default void	setInputType(org.apache.flink.api.common.typeinfo.TypeInformation<?> type, org.apache.flink.api.common.ExecutionConfig executionConfig)	Is called by the StreamGraph.addOperator(java.lang.Integer, java.lang.String, java.lang.String, org.apache.flink.streaming.api.operators.StreamOperatorFactory<OUT>, org.apache.flink.api.common.typeinfo.TypeInformation<IN>, org.apache.flink.api.common.typeinfo.TypeInformation<OUT>, java.lang.String) method when the StreamGraph is generated.
default void	setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> type, org.apache.flink.api.common.ExecutionConfig executionConfig)	Is called by the StreamGraph.addOperator(java.lang.Integer, java.lang.String, java.lang.String, org.apache.flink.streaming.api.operators.StreamOperatorFactory<OUT>, org.apache.flink.api.common.typeinfo.TypeInformation<IN>, org.apache.flink.api.common.typeinfo.TypeInformation<OUT>, java.lang.String) method when the StreamGraph is generated.

Method Detail

createStreamOperator

<T extends StreamOperator<OUT>> T createStreamOperator(StreamOperatorParameters<OUT> parameters)

Create the operator. Sets access to the context and the output.

setChainingStrategy

void setChainingStrategy(ChainingStrategy strategy)

Set the chaining strategy for operator factory.

getChainingStrategy

ChainingStrategy getChainingStrategy()

Get the chaining strategy of operator factory.

isStreamSource

default boolean isStreamSource()

Is this factory for StreamSource.

isLegacySource

default boolean isLegacySource()

isOutputTypeConfigurable

default boolean isOutputTypeConfigurable()

If the stream operator need access to the output type information at StreamGraph generation. This can be useful for cases where the output type is specified by the returns method and, thus, after the stream operator has been created.

setOutputType

default void setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> type,
                           org.apache.flink.api.common.ExecutionConfig executionConfig)

Is called by the StreamGraph.addOperator(java.lang.Integer, java.lang.String, java.lang.String, org.apache.flink.streaming.api.operators.StreamOperatorFactory<OUT>, org.apache.flink.api.common.typeinfo.TypeInformation<IN>, org.apache.flink.api.common.typeinfo.TypeInformation<OUT>, java.lang.String) method when the StreamGraph is generated. The method is called with the output TypeInformation which is also used for the StreamTask output serializer.

Parameters:

type - Output type information of the StreamTask

executionConfig - Execution configuration

isInputTypeConfigurable

default boolean isInputTypeConfigurable()

If the stream operator need to be configured with the data type they will operate on.

setInputType

default void setInputType(org.apache.flink.api.common.typeinfo.TypeInformation<?> type,
                          org.apache.flink.api.common.ExecutionConfig executionConfig)

Is called by the StreamGraph.addOperator(java.lang.Integer, java.lang.String, java.lang.String, org.apache.flink.streaming.api.operators.StreamOperatorFactory<OUT>, org.apache.flink.api.common.typeinfo.TypeInformation<IN>, org.apache.flink.api.common.typeinfo.TypeInformation<OUT>, java.lang.String) method when the StreamGraph is generated.

Parameters:

type - The data type of the input.

executionConfig - The execution config for this parallel execution.

getStreamOperatorClass

Class<? extends StreamOperator> getStreamOperatorClass(ClassLoader classLoader)

Returns the runtime class of the stream operator.

getOperatorAttributes

@Experimental
default OperatorAttributes getOperatorAttributes()

Is called to get the OperatorAttributes of the operator. OperatorAttributes can inform the frame to optimize the job performance.

Returns:

OperatorAttributes of the operator.