Class CachedObservable.ReplayProducer<T>

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

static final class CachedObservable.ReplayProducer<T> extends AtomicLong implements Producer, Subscription
Keeps track of the current request amount and the replay position for a child Subscriber.
  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      See Also:
    • child

      final Subscriber<? super T> child
      The actual child subscriber.
    • state

      The cache state object.
    • currentBuffer

      Object[] currentBuffer
      Contains the reference to the buffer segment in replay. Accessed after reading state.size() and when emitting == true.
    • currentIndexInBuffer

      int currentIndexInBuffer
      Contains the index into the currentBuffer where the next value is expected. Accessed after reading state.size() and when emitting == true.
    • index

      int index
      Contains the absolute index up until the values have been replayed so far.
    • emitting

      boolean emitting
      Indicates there is a replay going on; guarded by this.
    • missed

      boolean missed
      Indicates there were some state changes/replay attempts; guarded by this.
  • Constructor Details

  • 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

      public long produced(long n)
      Updates the request count to reflect values have been produced.
      Parameters:
      n - the produced item count, positive, not validated
      Returns:
      the latest request amount after subtracting 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
    • replay

      public void replay()
      Continue replaying available values if there are requests for them.