Interface AsyncFunction<I extends @Nullable java.lang.Object,​O extends @Nullable java.lang.Object>

  • Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

    @GwtCompatible
    @FunctionalInterface
    public interface AsyncFunction<I extends @Nullable java.lang.Object,​O extends @Nullable java.lang.Object>
    Transforms a value, possibly asynchronously. For an example usage and more information, see Futures.transformAsync(ListenableFuture, AsyncFunction, Executor).
    Since:
    11.0
    Author:
    Chris Povirk
    • Method Detail

      • apply

        ListenableFuture<Oapply​(I input)
                           throws java.lang.Exception
        Returns an output Future to use in place of the given input. The output Future need not be done, making AsyncFunction suitable for asynchronous derivations.

        Throwing an exception from this method is equivalent to returning a failing Future.

        Throws:
        java.lang.Exception