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

Class LocalInputChannel

java.lang.Object

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

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

All Implemented Interfaces:

BufferAvailabilityListener

public class LocalInputChannel
extends InputChannel
implements BufferAvailabilityListener

An input channel, which requests a local subpartition.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.runtime.io.network.partition.consumer.InputChannel

InputChannel.BufferAndAvailability

Field Summary

Fields inherited from class org.apache.flink.runtime.io.network.partition.consumer.InputChannel

channelInfo, consumedSubpartitionIndexSet, currentBackoff, initialBackoff, inputGate, maxBackoff, numBuffersIn, numBytesIn, partitionId

Constructor Summary

Constructors

Constructor and Description
LocalInputChannel(SingleInputGate inputGate, int channelIndex, ResultPartitionID partitionId, ResultSubpartitionIndexSet consumedSubpartitionIndexSet, ResultPartitionManager partitionManager, TaskEventPublisher taskEventPublisher, int initialBackoff, int maxBackoff, org.apache.flink.metrics.Counter numBytesIn, org.apache.flink.metrics.Counter numBuffersIn, ChannelStateWriter stateWriter)

Method Summary

Modifier and Type	Method and Description
void	acknowledgeAllRecordsProcessed() When received EndOfData from one channel, it need to acknowledge after this event get processed.
void	checkpointStarted(CheckpointBarrier barrier) Called by task thread when checkpointing is started (e.g., any input channel received barrier).
void	checkpointStopped(long checkpointId) Called by task thread on cancel/complete to clean-up temporary data.
Optional<InputChannel.BufferAndAvailability>	getNextBuffer() Returns the next buffer from the consumed subpartitions or Optional.empty() if there is no data to return.
void	notifyDataAvailable(ResultSubpartitionView view) Called whenever there might be new data available.
void	notifyRequiredSegmentId(int subpartitionId, int segmentId) Notify the upstream the id of required segment that should be sent to netty connection.
protected int	peekNextBufferSubpartitionIdInternal() Returns the index of the subpartition where the next buffer locates, or -1 if there is no buffer available and the subpartition to be consumed is not determined.
protected void	requestSubpartitions() Requests the subpartitions specified by InputChannel.partitionId and InputChannel.consumedSubpartitionIndexSet.
void	resumeConsumption() After sending a CheckpointBarrier of exactly-once mode, the upstream will be blocked and become unavailable.
String	toString()
int	unsynchronizedGetNumberOfQueuedBuffers()

Methods inherited from class org.apache.flink.runtime.io.network.partition.consumer.InputChannel

checkError, convertToPriorityEvent, getChannelIndex, getChannelInfo, getConsumedSubpartitionIndexSet, getCurrentBackoff, getPartitionId, increaseBackoff, notifyBufferAvailable, notifyChannelNonEmpty, notifyPriorityEvent, peekNextBufferSubpartitionId, setError, unsynchronizedGetSizeOfQueuedBuffers

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.io.network.partition.BufferAvailabilityListener

notifyPriorityEvent

Constructor Detail

LocalInputChannel

public LocalInputChannel(SingleInputGate inputGate,
                         int channelIndex,
                         ResultPartitionID partitionId,
                         ResultSubpartitionIndexSet consumedSubpartitionIndexSet,
                         ResultPartitionManager partitionManager,
                         TaskEventPublisher taskEventPublisher,
                         int initialBackoff,
                         int maxBackoff,
                         org.apache.flink.metrics.Counter numBytesIn,
                         org.apache.flink.metrics.Counter numBuffersIn,
                         ChannelStateWriter stateWriter)

Method Detail

checkpointStarted

public void checkpointStarted(CheckpointBarrier barrier)
                       throws CheckpointException

Description copied from class: InputChannel

Called by task thread when checkpointing is started (e.g., any input channel received barrier).

Overrides:

checkpointStarted in class InputChannel

Throws:

CheckpointException

checkpointStopped

public void checkpointStopped(long checkpointId)

Description copied from class: InputChannel

Called by task thread on cancel/complete to clean-up temporary data.

Overrides:

checkpointStopped in class InputChannel

requestSubpartitions

protected void requestSubpartitions()
                             throws IOException

Description copied from class: InputChannel

Requests the subpartitions specified by InputChannel.partitionId and InputChannel.consumedSubpartitionIndexSet.

Throws:

IOException

peekNextBufferSubpartitionIdInternal

protected int peekNextBufferSubpartitionIdInternal()
                                            throws IOException

Description copied from class: InputChannel

Returns the index of the subpartition where the next buffer locates, or -1 if there is no buffer available and the subpartition to be consumed is not determined.

Specified by:

peekNextBufferSubpartitionIdInternal in class InputChannel

Throws:

IOException

getNextBuffer

public Optional<InputChannel.BufferAndAvailability> getNextBuffer()
                                                           throws IOException

Description copied from class: InputChannel

Returns the next buffer from the consumed subpartitions or Optional.empty() if there is no data to return.

Specified by:

getNextBuffer in class InputChannel

Throws:

IOException

notifyDataAvailable

public void notifyDataAvailable(ResultSubpartitionView view)

Description copied from interface: BufferAvailabilityListener

Called whenever there might be new data available.

Specified by:

notifyDataAvailable in interface BufferAvailabilityListener

Parameters:

view - the ResultSubpartitionView containing available data.

resumeConsumption

public void resumeConsumption()

Description copied from class: InputChannel

After sending a CheckpointBarrier of exactly-once mode, the upstream will be blocked and become unavailable. This method tries to unblock the corresponding upstream and resume data consumption.

Specified by:

resumeConsumption in class InputChannel

acknowledgeAllRecordsProcessed

public void acknowledgeAllRecordsProcessed()
                                    throws IOException

Description copied from class: InputChannel

When received EndOfData from one channel, it need to acknowledge after this event get processed.

Specified by:

acknowledgeAllRecordsProcessed in class InputChannel

Throws:

IOException

unsynchronizedGetNumberOfQueuedBuffers

public int unsynchronizedGetNumberOfQueuedBuffers()

Overrides:

unsynchronizedGetNumberOfQueuedBuffers in class InputChannel

notifyRequiredSegmentId

public void notifyRequiredSegmentId(int subpartitionId,
                                    int segmentId)

Description copied from class: InputChannel

Notify the upstream the id of required segment that should be sent to netty connection.

Overrides:

notifyRequiredSegmentId in class InputChannel

Parameters:

subpartitionId - The id of the corresponding subpartition.

segmentId - The id of required segment.

toString

public String toString()

Overrides:

toString in class Object