001/*
002 * Copyright (C) 2011 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.util.concurrent;
018
019import com.google.common.annotations.Beta;
020
021import java.util.concurrent.AbstractExecutorService;
022import java.util.concurrent.Callable;
023
024import javax.annotation.Nullable;
025
026/**
027 * Abstract {@link ListeningExecutorService} implementation that creates
028 * {@link ListenableFutureTask} instances for each {@link Runnable} and {@link Callable} submitted
029 * to it. These tasks are run with the abstract {@link #execute execute(Runnable)} method.
030 *
031 * <p>In addition to {@link #execute}, subclasses must implement all methods related to shutdown and
032 * termination.
033 *
034 * @author Chris Povirk
035 * @since 14.0
036 */
037@Beta
038public abstract class AbstractListeningExecutorService
039    extends AbstractExecutorService implements ListeningExecutorService {
040
041  @Override protected final <T> ListenableFutureTask<T> newTaskFor(Runnable runnable, T value) {
042    return ListenableFutureTask.create(runnable, value);
043  }
044
045  @Override protected final <T> ListenableFutureTask<T> newTaskFor(Callable<T> callable) {
046    return ListenableFutureTask.create(callable);
047  }
048
049  @Override public ListenableFuture<?> submit(Runnable task) {
050    return (ListenableFuture<?>) super.submit(task);
051  }
052
053  @Override public <T> ListenableFuture<T> submit(Runnable task, @Nullable T result) {
054    return (ListenableFuture<T>) super.submit(task, result);
055  }
056
057  @Override public <T> ListenableFuture<T> submit(Callable<T> task) {
058    return (ListenableFuture<T>) super.submit(task);
059  }
060}