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

Class ResultSubpartition

java.lang.Object

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

Direct Known Subclasses:

PipelinedSubpartition

public abstract class ResultSubpartition
extends Object

A single subpartition of a ResultPartition instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResultSubpartition.BufferAndBacklog A combination of a Buffer and the backlog length indicating how many non-event buffers are available in the subpartition.

Field Summary

Fields

Modifier and Type	Field and Description
protected ResultPartition	parent The parent partition this subpartition belongs to.
protected ResultSubpartitionInfo	subpartitionInfo The info of the subpartition to identify it globally within a task.

Constructor Summary

Constructors

Constructor and Description
ResultSubpartition(int index, ResultPartition parent)

Method Summary

Modifier and Type	Method and Description
abstract void	abortCheckpoint(long checkpointId, CheckpointException cause)
int	add(BufferConsumer bufferConsumer)
abstract int	add(BufferConsumer bufferConsumer, int partialRecordLength) Adds the given buffer.
abstract void	alignedBarrierTimeout(long checkpointId)
abstract void	bufferSize(int desirableNewBufferSize)
abstract ResultSubpartitionView	createReadView(BufferAvailabilityListener availabilityListener)
abstract void	finish()
abstract void	flush()
abstract int	getNumberOfQueuedBuffers() Get the current size of the queue.
int	getSubPartitionIndex()
ResultSubpartitionInfo	getSubpartitionInfo()
protected abstract long	getTotalNumberOfBuffersUnsafe() Gets the total numbers of buffers (data buffers plus events).
protected abstract long	getTotalNumberOfBytesUnsafe()
abstract boolean	isReleased()
protected void	onConsumedSubpartition() Notifies the parent partition about a consumed ResultSubpartitionView.
abstract void	release()
abstract int	unsynchronizedGetNumberOfQueuedBuffers() Makes a best effort to get the current size of the queue.

Methods inherited from class java.lang.Object

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

Field Detail

subpartitionInfo

protected final ResultSubpartitionInfo subpartitionInfo

The info of the subpartition to identify it globally within a task.

parent

protected final ResultPartition parent

The parent partition this subpartition belongs to.

Constructor Detail

ResultSubpartition

public ResultSubpartition(int index,
                          ResultPartition parent)

Method Detail

getSubpartitionInfo

public ResultSubpartitionInfo getSubpartitionInfo()

getTotalNumberOfBuffersUnsafe

protected abstract long getTotalNumberOfBuffersUnsafe()

Gets the total numbers of buffers (data buffers plus events).

getTotalNumberOfBytesUnsafe

protected abstract long getTotalNumberOfBytesUnsafe()

getSubPartitionIndex

public int getSubPartitionIndex()

onConsumedSubpartition

protected void onConsumedSubpartition()

Notifies the parent partition about a consumed ResultSubpartitionView.

alignedBarrierTimeout

public abstract void alignedBarrierTimeout(long checkpointId)
                                    throws IOException

Throws:

IOException

abortCheckpoint

public abstract void abortCheckpoint(long checkpointId,
                                     CheckpointException cause)

add

@VisibleForTesting
public final int add(BufferConsumer bufferConsumer)
                                 throws IOException

Throws:

IOException

add

public abstract int add(BufferConsumer bufferConsumer,
                        int partialRecordLength)
                 throws IOException

Adds the given buffer.

The request may be executed synchronously, or asynchronously, depending on the implementation.

IMPORTANT: Before adding new BufferConsumer previously added must be in finished state. Because of the performance reasons, this is only enforced during the data reading. Priority events can be added while the previous buffer consumer is still open, in which case the open buffer consumer is overtaken.

Parameters:

bufferConsumer - the buffer to add (transferring ownership to this writer)

partialRecordLength - the length of bytes to skip in order to start with a complete record, from position index 0 of the underlying .

Returns:

the preferable buffer size for this subpartition or -1 if the add operation fails.

Throws:

IOException - thrown in case of errors while adding the buffer

flush

public abstract void flush()

finish

public abstract void finish()
                     throws IOException

Throws:

IOException

release

public abstract void release()
                      throws IOException

Throws:

IOException

createReadView

public abstract ResultSubpartitionView createReadView(BufferAvailabilityListener availabilityListener)
                                               throws IOException

Throws:

IOException

isReleased

public abstract boolean isReleased()

unsynchronizedGetNumberOfQueuedBuffers

public abstract int unsynchronizedGetNumberOfQueuedBuffers()

Makes a best effort to get the current size of the queue. This method must not acquire locks or interfere with the task and network threads in any way.

getNumberOfQueuedBuffers

public abstract int getNumberOfQueuedBuffers()

Get the current size of the queue.

bufferSize

public abstract void bufferSize(int desirableNewBufferSize)