- java.lang.Object
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- com.lmax.disruptor.YieldingWaitStrategy
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- All Implemented Interfaces:
WaitStrategy
public final class YieldingWaitStrategy extends java.lang.Object implements WaitStrategy
Yielding strategy that uses a Thread.yield() forEventProcessor
s waiting on a barrier after an initially spinning.This strategy will use 100% CPU, but will more readily give up the CPU than a busy spin strategy if other threads require CPU resource.
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Constructor Summary
Constructors Constructor Description YieldingWaitStrategy()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
signalAllWhenBlocking()
Implementations should signal the waitingEventProcessor
s that the cursor has advanced.long
waitFor(long sequence, Sequence cursor, Sequence dependentSequence, SequenceBarrier barrier)
Wait for the given sequence to be available.
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Method Detail
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waitFor
public long waitFor(long sequence, Sequence cursor, Sequence dependentSequence, SequenceBarrier barrier) throws AlertException, java.lang.InterruptedException
Description copied from interface: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. TheBatchEventProcessor
explicitly handles this case and will signal a timeout if required.- Specified by:
waitFor
in interfaceWaitStrategy
- Parameters:
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.- Returns:
- the sequence that is available which may be greater than the requested sequence.
- Throws:
AlertException
- if the status of the Disruptor has changed.java.lang.InterruptedException
- if the thread is interrupted.
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signalAllWhenBlocking
public void signalAllWhenBlocking()
Description copied from interface:WaitStrategy
Implementations should signal the waitingEventProcessor
s that the cursor has advanced.- Specified by:
signalAllWhenBlocking
in interfaceWaitStrategy
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