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

类 HsBufferContext

java.lang.Object

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

public class HsBufferContext
extends Object

This class maintains the buffer's reference count and its status for hybrid shuffle mode.

Each buffer has three status: released, spillStarted, consumed.

• released indicates that buffer has been released from the memory data manager, and can no longer be spilled or consumed.
• spillStarted indicates that spilling of the buffer has started, either completed or not.
• consumed indicates that buffer has been consumed by the downstream.

Reference count of the buffer is maintained as follows: *

• +1 when the buffer is obtained by memory data manager (from the buffer pool), and -1 when it is released from memory data manager.
• +1 when spilling of the buffer is tarted, and -1 when it is completed.
• +1 when the buffer is being consumed, and -1 when consuming is completed (by the downstream).

Note: This class is not thread-safe.

构造器概要

构造器

构造器和说明
HsBufferContext(Buffer buffer, int bufferIndex, int subpartitionId)

方法概要

限定符和类型	方法和说明
void	consumed()
Buffer	getBuffer()
BufferIndexAndChannel	getBufferIndexAndChannel()
Optional<CompletableFuture<Void>>	getSpilledFuture()
boolean	isConsumed()
boolean	isReleased()
boolean	isSpillStarted()
void	release() Mark buffer status to release.
boolean	startSpilling(CompletableFuture<Void> spilledFuture) Mark buffer status to startSpilling.

从类继承的方法 java.lang.Object

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

构造器详细资料

HsBufferContext

public HsBufferContext(Buffer buffer,
                       int bufferIndex,
                       int subpartitionId)

方法详细资料

getBuffer

public Buffer getBuffer()

getBufferIndexAndChannel

public BufferIndexAndChannel getBufferIndexAndChannel()

isReleased

public boolean isReleased()

isSpillStarted

public boolean isSpillStarted()

isConsumed

public boolean isConsumed()

getSpilledFuture

public Optional<CompletableFuture<Void>> getSpilledFuture()

release

public void release()

Mark buffer status to release.

startSpilling

public boolean startSpilling(CompletableFuture<Void> spilledFuture)

Mark buffer status to startSpilling.

参数:

spilledFuture - completable future of this buffer's spilling operation.

返回:

false, if spilling of the buffer has been started before or the buffer has been released already; true, otherwise.

consumed

public void consumed()