Class UnicastProcessor.UnicastQueueSubscription

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void cancel()  
      void clear()
      Removes all enqueued items from this queue.
      boolean isEmpty()
      Returns true if the queue is empty.
      T poll()
      Tries to dequeue a value (non-null) or returns null if the queue is empty.
      void request​(long n)  
      int requestFusion​(int requestedMode)
      Request a fusion mode from the upstream.
      • Methods inherited from class java.util.concurrent.atomic.AtomicInteger

        accumulateAndGet, addAndGet, compareAndExchange, compareAndExchangeAcquire, compareAndExchangeRelease, compareAndSet, decrementAndGet, doubleValue, floatValue, get, getAcquire, getAndAccumulate, getAndAdd, getAndDecrement, getAndIncrement, getAndSet, getAndUpdate, getOpaque, getPlain, incrementAndGet, intValue, lazySet, longValue, set, setOpaque, setPlain, setRelease, toString, updateAndGet, weakCompareAndSet, weakCompareAndSetAcquire, weakCompareAndSetPlain, weakCompareAndSetRelease, weakCompareAndSetVolatile
      • Methods inherited from class java.lang.Number

        byteValue, shortValue
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • Constructor Detail

      • UnicastQueueSubscription

        UnicastQueueSubscription()
    • Method Detail

      • poll

        @Nullable
        public T poll()
        Description copied from interface: SimpleQueue
        Tries to dequeue a value (non-null) or returns null if the queue is empty.

        If the producer uses SimpleQueue.offer(Object, Object) and when polling in pairs, if the first poll() returns a non-null item, the second poll() is guaranteed to return a non-null item as well.

        Returns:
        the item or null to indicate an empty queue
      • isEmpty

        public boolean isEmpty()
        Description copied from interface: SimpleQueue
        Returns true if the queue is empty.

        Note however that due to potential fused functions in SimpleQueue.poll() it is possible this method returns false but then poll() returns null because the fused function swallowed the available item(s).

        Returns:
        true if the queue is empty
      • clear

        public void clear()
        Description copied from interface: SimpleQueue
        Removes all enqueued items from this queue.
      • request

        public void request​(long n)
      • cancel

        public void cancel()