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/*
 * 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.Beta;
import com.google.common.annotations.GwtCompatible;
import java.util.concurrent.Future;

/**
 * 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 */ @Beta @FunctionalInterface @GwtCompatible 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; }





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