org.apache.flink.runtime.io.network.partition.consumer

Class ChannelStatePersister

java.lang.Object

org.apache.flink.runtime.io.network.partition.consumer.ChannelStatePersister

@NotThreadSafe
public final class ChannelStatePersister
extends Object

Helper class for persisting channel state via ChannelStateWriter.

Method Summary

Modifier and Type	Method and Description
protected OptionalLong	checkForBarrier(Buffer buffer)
protected boolean	hasBarrierReceived()
protected void	maybePersist(Buffer buffer)
protected AbstractEvent	parseEvent(Buffer buffer) Parses the buffer as an event and returns the CheckpointBarrier if the event is indeed a barrier or returns null in all other cases.
protected void	startPersisting(long barrierId, List<Buffer> knownBuffers)
protected void	stopPersisting(long id)
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

startPersisting

protected void startPersisting(long barrierId,
                               List<Buffer> knownBuffers)
                        throws CheckpointException

Throws:

CheckpointException

stopPersisting

protected void stopPersisting(long id)

maybePersist

protected void maybePersist(Buffer buffer)

checkForBarrier

protected OptionalLong checkForBarrier(Buffer buffer)
                                throws IOException

Throws:

IOException

parseEvent

@Nullable
protected AbstractEvent parseEvent(Buffer buffer)
                                      throws IOException

Parses the buffer as an event and returns the CheckpointBarrier if the event is indeed a barrier or returns null in all other cases.

Throws:

IOException

hasBarrierReceived

protected boolean hasBarrierReceived()

toString

public String toString()

Overrides:

toString in class Object