com.alipay.disruptor

类 AbstractSequencer

java.lang.Object

com.alipay.disruptor.AbstractSequencer

所有已实现的接口:

Cursored, Sequenced, Sequencer

直接已知子类:

MultiProducerSequencer, SingleProducerSequencer

public abstract class AbstractSequencer
extends Object
implements Sequencer

Base class for the various sequencer types (single/multi). Provides common functionality like the management of gating sequences (add/remove) and ownership of the current cursor.

字段概要

字段

限定符和类型	字段和说明
protected int	bufferSize
protected Sequence	cursor
protected Sequence[]	gatingSequences
protected WaitStrategy	waitStrategy

从接口继承的字段 com.alipay.disruptor.Sequencer

INITIAL_CURSOR_VALUE

构造器概要

构造器

构造器和说明
AbstractSequencer(int bufferSize, WaitStrategy waitStrategy) Create with the specified buffer size and wait strategy.

方法概要

方法

限定符和类型	方法和说明
void	addGatingSequences(Sequence... gatingSequences) Add the specified gating sequences to this instance of the Disruptor.
int	getBufferSize() The capacity of the data structure to hold entries.
long	getCursor() Get the current cursor value.
long	getMinimumSequence() Get the minimum sequence value from all of the gating sequences added to this ringBuffer.
SequenceBarrier	newBarrier(Sequence... sequencesToTrack) Create a new SequenceBarrier to be used by an EventProcessor to track which messages are available to be read from the ring buffer given a list of sequences to track.
<T> EventPoller<T>	newPoller(DataProvider<T> dataProvider, Sequence... gatingSequences) Creates an event poller for this sequence that will use the supplied data provider and gating sequences.
boolean	removeGatingSequence(Sequence sequence) Remove the specified sequence from this sequencer.
String	toString()

从类继承的方法 java.lang.Object

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

从接口继承的方法 com.alipay.disruptor.Sequencer

claim, getHighestPublishedSequence, isAvailable

从接口继承的方法 com.alipay.disruptor.Sequenced

hasAvailableCapacity, next, next, publish, publish, remainingCapacity, tryNext, tryNext

字段详细资料

bufferSize

protected final int bufferSize

waitStrategy

protected final WaitStrategy waitStrategy

cursor

protected final Sequence cursor

gatingSequences

protected volatile Sequence[] gatingSequences

构造器详细资料

AbstractSequencer

public AbstractSequencer(int bufferSize,
                 WaitStrategy waitStrategy)

Create with the specified buffer size and wait strategy.

参数:

bufferSize - The total number of entries, must be a positive power of 2.

waitStrategy - waitStrategy

方法详细资料

getCursor

public final long getCursor()

从接口复制的说明: Cursored

Get the current cursor value.

指定者:

getCursor 在接口中 Cursored

返回:

current cursor value

另请参阅:

Cursored.getCursor()

getBufferSize

public final int getBufferSize()

从接口复制的说明: Sequenced

The capacity of the data structure to hold entries.

指定者:

getBufferSize 在接口中 Sequenced

返回:

the size of the RingBuffer.

另请参阅:

Sequenced.getBufferSize()

addGatingSequences

public final void addGatingSequences(Sequence... gatingSequences)

从接口复制的说明: Sequencer

Add the specified gating sequences to this instance of the Disruptor. They will safely and atomically added to the list of gating sequences.

指定者:

addGatingSequences 在接口中 Sequencer

参数:

gatingSequences - The sequences to add.

另请参阅:

Sequencer.addGatingSequences(Sequence...)

removeGatingSequence

public boolean removeGatingSequence(Sequence sequence)

从接口复制的说明: Sequencer

Remove the specified sequence from this sequencer.

指定者:

removeGatingSequence 在接口中 Sequencer

参数:

sequence - to be removed.

返回:

true if this sequence was found, false otherwise.

另请参阅:

Sequencer.removeGatingSequence(Sequence)

getMinimumSequence

public long getMinimumSequence()

从接口复制的说明: Sequencer

Get the minimum sequence value from all of the gating sequences added to this ringBuffer.

指定者:

getMinimumSequence 在接口中 Sequencer

返回:

The minimum gating sequence or the cursor sequence if no sequences have been added.

另请参阅:

Sequencer.getMinimumSequence()

newBarrier

public SequenceBarrier newBarrier(Sequence... sequencesToTrack)

从接口复制的说明: Sequencer

Create a new SequenceBarrier to be used by an EventProcessor to track which messages are available to be read from the ring buffer given a list of sequences to track.

指定者:

newBarrier 在接口中 Sequencer

参数:

sequencesToTrack - sequencesToTrack

返回:

A sequence barrier that will track the specified sequences.

另请参阅:

Sequencer.newBarrier(Sequence...)

newPoller

public <T> EventPoller<T> newPoller(DataProvider<T> dataProvider,
                           Sequence... gatingSequences)

Creates an event poller for this sequence that will use the supplied data provider and gating sequences.

指定者:

newPoller 在接口中 Sequencer

参数:

dataProvider - The data source for users of this event poller

gatingSequences - Sequence to be gated on.

返回:

A poller that will gate on this ring buffer and the supplied sequences.

toString

public String toString()

覆盖:

toString 在类中 Object