com.google.common.util.concurrent.AsyncCallable Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright (C) 2015 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.common.util.concurrent;
import com.google.common.annotations.GwtCompatible;
import java.util.concurrent.Future;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* Computes a value, possibly asynchronously. For an example usage and more information, see {@link
* Futures.FutureCombiner#callAsync(AsyncCallable, java.util.concurrent.Executor)}.
*
* Much like {@link java.util.concurrent.Callable}, but returning a {@link ListenableFuture}
* result.
*
* @since 20.0
*/
@FunctionalInterface
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface AsyncCallable {
/**
* Computes a result {@code Future}. The output {@code Future} need not be {@linkplain
* Future#isDone done}, making {@code AsyncCallable} suitable for asynchronous derivations.
*
* Throwing an exception from this method is equivalent to returning a failing {@link
* ListenableFuture}.
*/
ListenableFuture call() throws Exception;
}