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

Class AbstractCollectResultBuffer<T>

java.lang.Object

org.apache.flink.streaming.api.operators.collect.AbstractCollectResultBuffer<T>

Direct Known Subclasses:

CheckpointedCollectResultBuffer, UncheckpointedCollectResultBuffer

public abstract class AbstractCollectResultBuffer<T>
extends Object

A buffer which encapsulates the logic of dealing with the response from the CollectSinkFunction.

Constructor Summary

Constructors

Constructor	Description
AbstractCollectResultBuffer(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)

Method Summary

Modifier and Type	Method	Description
void	complete()
void	dealWithResponse(CollectCoordinationResponse response, long responseOffset)
long	getOffset()
String	getVersion()
protected abstract void	maintainVisibility(long currentVisiblePos, long lastCheckpointedOffset)
protected void	makeResultsVisible(long visiblePos)
T	next()	Get next user visible result, returns null if currently there is no more.
protected void	reset()	Clear the whole buffer and discard all results.
protected void	revert(long checkpointedOffset)	Revert the buffer back to the result whose offset is `checkpointedOffset`.
protected abstract void	sinkRestarted(long lastCheckpointedOffset)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCollectResultBuffer

public AbstractCollectResultBuffer(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)

Method Detail

next

public T next()

Get next user visible result, returns null if currently there is no more.

getOffset

public long getOffset()

getVersion

public String getVersion()

dealWithResponse

public void dealWithResponse(CollectCoordinationResponse response,
                             long responseOffset)
                      throws IOException

Throws:

IOException

complete

public void complete()

sinkRestarted

protected abstract void sinkRestarted(long lastCheckpointedOffset)

maintainVisibility

protected abstract void maintainVisibility(long currentVisiblePos,
                                           long lastCheckpointedOffset)

makeResultsVisible

protected void makeResultsVisible(long visiblePos)

revert

protected void revert(long checkpointedOffset)

Revert the buffer back to the result whose offset is `checkpointedOffset`.

reset

protected void reset()

Clear the whole buffer and discard all results.