Class ScalarSynchronousObservable.WeakSingleProducer<T>

  • Type Parameters:
    T - the value type
    All Implemented Interfaces:
    Producer
    Enclosing class:
    ScalarSynchronousObservable<T>

    static final class ScalarSynchronousObservable.WeakSingleProducer<T>
    extends java.lang.Object
    implements Producer
    This is the weak version of SingleProducer that uses plain fields to avoid reentrancy and as such is not threadsafe for concurrent request() calls.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) Subscriber<? super T> actual  
      (package private) boolean once  
      (package private) T value  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void request​(long n)
      Request a certain maximum number of items from this Producer.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • value

        final T value
      • once

        boolean once
    • Constructor Detail

      • WeakSingleProducer

        public WeakSingleProducer​(Subscriber<? super T> actual,
                                  T value)
    • Method Detail

      • request

        public void request​(long n)
        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:
        n - 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