Class OnSubscribeRange.RangeProducer

  • All Implemented Interfaces:
    java.io.Serializable, Producer
    Enclosing class:
    OnSubscribeRange

    static final class OnSubscribeRange.RangeProducer
    extends java.util.concurrent.atomic.AtomicLong
    implements Producer
    • Constructor Summary

      Constructors 
      Constructor Description
      RangeProducer​(Subscriber<? super java.lang.Integer> childSubscriber, int startIndex, int endIndex)  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      (package private) void fastpath()
      Emits all remaining values without decrementing the requested amount.
      void request​(long requestedAmount)
      Request a certain maximum number of items from this Producer.
      (package private) void slowpath​(long requestedAmount)
      Emits as many values as requested or remaining from the range, whichever is smaller.
      • Methods inherited from class java.util.concurrent.atomic.AtomicLong

        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
    • Field Detail

      • childSubscriber

        private final Subscriber<? super java.lang.Integer> childSubscriber
      • endOfRange

        private final int endOfRange
      • currentIndex

        private long currentIndex
    • Constructor Detail

      • RangeProducer

        RangeProducer​(Subscriber<? super java.lang.Integer> childSubscriber,
                      int startIndex,
                      int endIndex)
    • Method Detail

      • request

        public void request​(long requestedAmount)
        Description copied from interface: Producer
        Request a certain maximum number of items from this Producer. This is a way of requesting backpressure. To disable backpressure, pass Long.MAX_VALUE to this method.

        Requests are additive but if a sequence of requests totals more than Long.MAX_VALUE then Long.MAX_VALUE requests will be actioned and the extras may be ignored. Arriving at Long.MAX_VALUE by addition of requests cannot be assumed to disable backpressure. For example, the code below may result in Long.MAX_VALUE requests being actioned only.

         request(100);
         request(Long.MAX_VALUE-1);
         
        Specified by:
        request in interface Producer
        Parameters:
        requestedAmount - the maximum number of items you want this Producer to produce, or Long.MAX_VALUE if you want the Producer to produce items at its own pace
      • slowpath

        void slowpath​(long requestedAmount)
        Emits as many values as requested or remaining from the range, whichever is smaller.
      • fastpath

        void fastpath()
        Emits all remaining values without decrementing the requested amount.