org.apache.flink.streaming.api.operators

Class AbstractStreamOperator<OUT>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

Type Parameters:

OUT - The output type of the operator

All Implemented Interfaces:

Serializable, StreamOperator<OUT>

Direct Known Subclasses:

AbstractUdfStreamOperator, StreamCounter, StreamDiscretizer, StreamProject, StreamWindowBuffer, WindowFlattener, WindowMerger, WindowPartitioner

public abstract class AbstractStreamOperator<OUT>
extends Object
implements StreamOperator<OUT>

Base class for operators that do not contain a user-defined function.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

StreamOperator.ChainingStrategy

Field Summary

Fields

Modifier and Type	Field and Description
protected StreamOperator.ChainingStrategy	chainingStrategy
protected org.apache.flink.api.common.ExecutionConfig	executionConfig
protected boolean	inputCopyDisabled
Output<OUT>	output
protected org.apache.flink.api.common.functions.RuntimeContext	runtimeContext

Constructor Summary

Constructors

Constructor and Description
AbstractStreamOperator()

Method Summary

Modifier and Type	Method and Description
void	close() This method is called after no more elements for can arrive for processing.
void	disableInputCopy() Enable object-reuse for this operator instance.
StreamOperator.ChainingStrategy	getChainingStrategy()
boolean	isInputCopyingDisabled() An operator can return true here to disable copying of its input elements.
void	open(org.apache.flink.configuration.Configuration parameters) This method is called before any elements are processed.
void	setChainingStrategy(StreamOperator.ChainingStrategy strategy)
void	setup(Output<OUT> output, org.apache.flink.api.common.functions.RuntimeContext runtimeContext) Initializes the StreamOperator for input and output handling.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

runtimeContext

protected transient org.apache.flink.api.common.functions.RuntimeContext runtimeContext

executionConfig

protected transient org.apache.flink.api.common.ExecutionConfig executionConfig

output

public transient Output<OUT> output

inputCopyDisabled

protected boolean inputCopyDisabled

chainingStrategy

protected StreamOperator.ChainingStrategy chainingStrategy

Constructor Detail

AbstractStreamOperator

public AbstractStreamOperator()

Method Detail

setup

public void setup(Output<OUT> output,
                  org.apache.flink.api.common.functions.RuntimeContext runtimeContext)

Description copied from interface: StreamOperator

Initializes the StreamOperator for input and output handling.

Specified by:

setup in interface StreamOperator<OUT>

open

public void open(org.apache.flink.configuration.Configuration parameters)
          throws Exception

Description copied from interface: StreamOperator

This method is called before any elements are processed.

Specified by:

open in interface StreamOperator<OUT>

Throws:

Exception

close

public void close()
           throws Exception

Description copied from interface: StreamOperator

This method is called after no more elements for can arrive for processing.

Specified by:

close in interface StreamOperator<OUT>

Throws:

Exception

setChainingStrategy

public final void setChainingStrategy(StreamOperator.ChainingStrategy strategy)

Specified by:

setChainingStrategy in interface StreamOperator<OUT>

getChainingStrategy

public final StreamOperator.ChainingStrategy getChainingStrategy()

Specified by:

getChainingStrategy in interface StreamOperator<OUT>

isInputCopyingDisabled

public boolean isInputCopyingDisabled()

Description copied from interface: StreamOperator

An operator can return true here to disable copying of its input elements. This overrides the object-reuse setting on the ExecutionConfig

Specified by:

isInputCopyingDisabled in interface StreamOperator<OUT>

disableInputCopy

public void disableInputCopy()

Enable object-reuse for this operator instance. This overrides the setting in the ExecutionConfig/