Class OperatorOnBackpressureLatest.LatestEmitter<T>

java.lang.Object
java.lang.Number
java.util.concurrent.atomic.AtomicLong
rx.internal.operators.OperatorOnBackpressureLatest.LatestEmitter<T>
Type Parameters:
T -
All Implemented Interfaces:
Serializable, Observer<T>, Producer, Subscription
Enclosing class:
OperatorOnBackpressureLatest<T>

static final class OperatorOnBackpressureLatest.LatestEmitter<T> extends AtomicLong implements Producer, Subscription, Observer<T>
A terminable producer which emits the latest items on request.
  • Field Details

  • Constructor Details

    • LatestEmitter

      public LatestEmitter(Subscriber<? super T> child)
  • Method Details

    • 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
    • produced

      long produced(long n)
    • isUnsubscribed

      public boolean isUnsubscribed()
      Description copied from interface: Subscription
      Indicates whether this Subscription is currently unsubscribed.
      Specified by:
      isUnsubscribed in interface Subscription
      Returns:
      true if this Subscription is currently unsubscribed, false otherwise
    • unsubscribe

      public void unsubscribe()
      Description copied from interface: Subscription
      Stops the receipt of notifications on the Subscriber that was registered when this Subscription was received.

      This allows unregistering an Subscriber before it has finished receiving all events (i.e. before onCompleted is called).

      Specified by:
      unsubscribe in interface Subscription
    • onNext

      public void onNext(T t)
      Description copied from interface: Observer
      Provides the Observer with a new item to observe.

      The Observable may call this method 0 or more times.

      The Observable will not call this method again after it calls either Observer.onCompleted() or Observer.onError(java.lang.Throwable).

      Specified by:
      onNext in interface Observer<T>
      Parameters:
      t - the item emitted by the Observable
    • onError

      public void onError(Throwable e)
      Description copied from interface: Observer
      Notifies the Observer that the Observable has experienced an error condition.

      If the Observable calls this method, it will not thereafter call Observer.onNext(T) or Observer.onCompleted().

      Specified by:
      onError in interface Observer<T>
      Parameters:
      e - the exception encountered by the Observable
    • onCompleted

      public void onCompleted()
      Description copied from interface: Observer
      Notifies the Observer that the Observable has finished sending push-based notifications.

      The Observable will not call this method if it calls Observer.onError(java.lang.Throwable).

      Specified by:
      onCompleted in interface Observer<T>
    • emit

      void emit()