com.alipay.disruptor

类 PhasedBackoffWaitStrategy

java.lang.Object

com.alipay.disruptor.PhasedBackoffWaitStrategy

所有已实现的接口:

WaitStrategy

public final class PhasedBackoffWaitStrategy
extends Object
implements WaitStrategy

Phased wait strategy for waiting EventProcessors on a barrier.

This strategy can be used when throughput and low-latency are not as important as CPU resource. Spins, then yields, then waits using the configured fallback WaitStrategy.

构造器概要

构造器

构造器和说明
PhasedBackoffWaitStrategy(long spinTimeout, long yieldTimeout, TimeUnit units, WaitStrategy fallbackStrategy)

方法概要

方法

限定符和类型	方法和说明
void	signalAllWhenBlocking() Implementations should signal the waiting EventProcessors that the cursor has advanced.
long	waitFor(long sequence, Sequence cursor, Sequence dependentSequence, SequenceBarrier barrier) Wait for the given sequence to be available.
static PhasedBackoffWaitStrategy	withLiteLock(long spinTimeout, long yieldTimeout, TimeUnit units) Block with wait/notifyAll semantics
static PhasedBackoffWaitStrategy	withLock(long spinTimeout, long yieldTimeout, TimeUnit units) Block with wait/notifyAll semantics
static PhasedBackoffWaitStrategy	withSleep(long spinTimeout, long yieldTimeout, TimeUnit units) Block by sleeping in a loop

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

PhasedBackoffWaitStrategy

public PhasedBackoffWaitStrategy(long spinTimeout,
                         long yieldTimeout,
                         TimeUnit units,
                         WaitStrategy fallbackStrategy)

方法详细资料

withLock

public static PhasedBackoffWaitStrategy withLock(long spinTimeout,
                                 long yieldTimeout,
                                 TimeUnit units)

Block with wait/notifyAll semantics

参数:

spinTimeout - spinTimeout

yieldTimeout - yieldTimeout

units - units

返回:

PhasedBackoffWaitStrategy

withLiteLock

public static PhasedBackoffWaitStrategy withLiteLock(long spinTimeout,
                                     long yieldTimeout,
                                     TimeUnit units)

Block with wait/notifyAll semantics

参数:

spinTimeout - spinTimeout

yieldTimeout - yieldTimeout

units - units

返回:

PhasedBackoffWaitStrategy

withSleep

public static PhasedBackoffWaitStrategy withSleep(long spinTimeout,
                                  long yieldTimeout,
                                  TimeUnit units)

Block by sleeping in a loop

参数:

spinTimeout - spinTimeout

yieldTimeout - yieldTimeout

units - units

返回:

PhasedBackoffWaitStrategy

waitFor

public long waitFor(long sequence,
           Sequence cursor,
           Sequence dependentSequence,
           SequenceBarrier barrier)
             throws AlertException,
                    InterruptedException,
                    TimeoutException

从接口复制的说明: WaitStrategy

Wait for the given sequence to be available. It is possible for this method to return a value less than the sequence number supplied depending on the implementation of the WaitStrategy. A common use for this is to signal a timeout. Any EventProcessor that is using a WaitStrategy to get notifications about message becoming available should remember to handle this case. The BatchEventProcessor explicitly handles this case and will signal a timeout if required.

指定者:

waitFor 在接口中 WaitStrategy

参数:

sequence - to be waited on.

cursor - the main sequence from ringbuffer. Wait/notify strategies will need this as it's the only sequence that is also notified upon update.

dependentSequence - on which to wait.

barrier - the processor is waiting on.

返回:

the sequence that is available which may be greater than the requested sequence.

抛出:

AlertException - if the status of the Disruptor has changed.

InterruptedException - if the thread is interrupted.

TimeoutException - TimeoutException

signalAllWhenBlocking

public void signalAllWhenBlocking()

从接口复制的说明: WaitStrategy

Implementations should signal the waiting EventProcessors that the cursor has advanced.

指定者:

signalAllWhenBlocking 在接口中 WaitStrategy