• Enclosing class:
    Flow

    public static interface Flow.Subscription

    Message control linking a Flow.Publisher and Flow.Subscriber. Subscribers receive items only when requested, and may cancel at any time. The methods in this interface are intended to be invoked only by their Subscribers; usages in other contexts have undefined effects.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      void cancel​()

      Causes the Subscriber to (eventually) stop receiving messages.
      void request​(long n)

      Adds the given number n of items to the current unfulfilled demand for this subscription.

    • Method Detail

      • request

        void request​(long n)

        Adds the given number n of items to the current unfulfilled demand for this subscription. If n is less than or equal to zero, the Subscriber will receive an onError signal with an IllegalArgumentException argument. Otherwise, the Subscriber will receive up to n additional onNext invocations (or fewer if terminated).

        Parameters:
        n - the increment of demand; a value of Long.MAX_VALUE may be considered as effectively unbounded

      • cancel

        void cancel​()

        Causes the Subscriber to (eventually) stop receiving messages. Implementation is best-effort -- additional messages may be received after invoking this method. A cancelled subscription need not ever receive an onComplete or onError signal.