001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.kernel.concurrent;
016    
017    /**
018     * Implements the same behavior as {@link
019     * java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy}.
020     *
021     * @author Shuyang Zhou
022     * @see    java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy
023     */
024    public class CallerRunsPolicy implements RejectedExecutionHandler {
025    
026            /**
027             * @see java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy#rejectedExecution(
028             *      Runnable, java.util.concurrent.ThreadPoolExecutor)
029             */
030            @Override
031            public void rejectedExecution(
032                    Runnable runnable, ThreadPoolExecutor threadPoolExecutor) {
033    
034                    if (threadPoolExecutor.isShutdown()) {
035                            return;
036                    }
037    
038                    ThreadPoolHandler threadPoolHandler =
039                            threadPoolExecutor.getThreadPoolHandler();
040    
041                    Throwable throwable = null;
042    
043                    threadPoolHandler.beforeExecute(Thread.currentThread(), runnable);
044    
045                    try {
046                            runnable.run();
047                    }
048                    catch (RuntimeException re) {
049                            throwable = re;
050    
051                            throw re;
052                    }
053                    finally {
054                            threadPoolHandler.afterExecute(runnable, throwable);
055                    }
056            }
057    
058    }