11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2011 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.util.concurrent; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.concurrent.Callable; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * A listening executor service which forwards all its method calls to another 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * listening executor service. Subclasses should override one or more methods to 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * modify the behavior of the backing executor service as desired per the <a 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>. 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Isaac Shum 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @since 10.0 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic abstract class ForwardingListeningExecutorService 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert extends ForwardingExecutorService implements ListeningExecutorService { 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert /** Constructor for use by subclasses. */ 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert protected ForwardingListeningExecutorService() {} 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert protected abstract ListeningExecutorService delegate(); 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public <T> ListenableFuture<T> submit(Callable<T> task) { 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return delegate().submit(task); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public ListenableFuture<?> submit(Runnable task) { 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return delegate().submit(task); 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public <T> ListenableFuture<T> submit(Runnable task, T result) { 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return delegate().submit(task, result); 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 53