Package com.google.common.util.concurrent

Interface AsyncFunction<I extends @Nullable Object,O extends @Nullable 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 Object,O extends @Nullable 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 Summary

Modifier and Type	Method	Description
ListenableFuture<O>	apply(I input)	Returns an output Future to use in place of the given input.

Method Detail

apply

ListenableFuture<O> apply(I input)
                   throws 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:

Exception