org.apache.flink.streaming.runtime.tasks

Class StreamOperatorWrapper<OUT,OP extends StreamOperator<OUT>>

java.lang.Object

org.apache.flink.streaming.runtime.tasks.StreamOperatorWrapper<OUT,OP>

@Internal
public class StreamOperatorWrapper<OUT,OP extends StreamOperator<OUT>>
extends Object

This class handles the close, endInput and other related logic of a StreamOperator. It also automatically propagates the close operation to the next wrapper that the next points to, so we can use next to link all operator wrappers in the operator chain and close all operators only by calling the close(StreamTaskActionExecutor, boolean, boolean) method of the header operator wrapper.

Method Summary

Modifier and Type	Method and Description
void	close(StreamTaskActionExecutor actionExecutor, boolean isStoppingBySyncSavepoint) Closes the wrapped operator and propagates the close operation to the next wrapper that the next points to.
void	endOperatorInput(int inputId) Ends an input of the operator contained by this wrapper.
OP	getStreamOperator()
boolean	isClosed() Checks if the wrapped operator has been closed.
void	notifyCheckpointComplete(long checkpointId)

Methods inherited from class java.lang.Object

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

Method Detail

close

public void close(StreamTaskActionExecutor actionExecutor,
                  boolean isStoppingBySyncSavepoint)
           throws Exception

Closes the wrapped operator and propagates the close operation to the next wrapper that the next points to.

Note that this method must be called in the task thread, because we need to call MailboxExecutor.yield() to take the mails of closing operator and running timers and run them.

Throws:

Exception

isClosed

public boolean isClosed()

Checks if the wrapped operator has been closed.

Note that this method must be called in the task thread.

endOperatorInput

public void endOperatorInput(int inputId)
                      throws Exception

Ends an input of the operator contained by this wrapper.

Parameters:

inputId - the input ID starts from 1 which indicates the first input.

Throws:

Exception

notifyCheckpointComplete

public void notifyCheckpointComplete(long checkpointId)
                              throws Exception

Throws:

Exception

getStreamOperator

public OP getStreamOperator()