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/*
 * Copyright (C) 2011 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.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.ForwardingObject;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.errorprone.annotations.CheckReturnValue;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * An executor service which forwards all its method calls to another executor service. Subclasses
 * should override one or more methods to modify the behavior of the backing executor service as
 * desired per the decorator pattern.
 *
 * 

{@code default} method warning: This class does not forward calls to {@code * default} methods. Instead, it inherits their default implementations. When those implementations * invoke methods, they invoke methods on the {@code ForwardingExecutorService}. * * @author Kurt Alfred Kluever * @since 10.0 */ @J2ktIncompatible @GwtIncompatible @ElementTypesAreNonnullByDefault public abstract class ForwardingExecutorService extends ForwardingObject implements ExecutorService { /** Constructor for use by subclasses. */ protected ForwardingExecutorService() {} @Override protected abstract ExecutorService delegate(); @CheckReturnValue @Override public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException { return delegate().awaitTermination(timeout, unit); } @Override public List> invokeAll( Collection> tasks) throws InterruptedException { return delegate().invokeAll(tasks); } @Override public List> invokeAll( Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException { return delegate().invokeAll(tasks, timeout, unit); } @Override public T invokeAny(Collection> tasks) throws InterruptedException, ExecutionException { return delegate().invokeAny(tasks); } @Override public T invokeAny( Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException { return delegate().invokeAny(tasks, timeout, unit); } @Override public boolean isShutdown() { return delegate().isShutdown(); } @Override public boolean isTerminated() { return delegate().isTerminated(); } @Override public void shutdown() { delegate().shutdown(); } @Override @CanIgnoreReturnValue public List shutdownNow() { return delegate().shutdownNow(); } @Override public void execute(Runnable command) { delegate().execute(command); } @Override public Future submit(Callable task) { return delegate().submit(task); } @Override public Future submit(Runnable task) { return delegate().submit(task); } @Override public Future submit( Runnable task, @ParametricNullness T result) { return delegate().submit(task, result); } }





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