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 finish, endInput and other related logic of a StreamOperator. It also automatically propagates the finish 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 finish all operators only by calling the finish(StreamTaskActionExecutor, StopMode) method of the header operator wrapper.

Method Summary

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

Methods inherited from class java.lang.Object

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

Method Detail

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

notifyCheckpointSubsumed

public void notifyCheckpointSubsumed(long checkpointId)
                              throws Exception

Throws:

Exception

getStreamOperator

public OP getStreamOperator()

finish

public void finish(StreamTaskActionExecutor actionExecutor,
                   StopMode stopMode)
            throws Exception

Finishes the wrapped operator and propagates the finish 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

close

public void close()
           throws Exception

Close the operator.

Throws:

Exception