001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.backgroundtask;
016    
017    import java.io.Serializable;
018    
019    import java.util.Map;
020    
021    /**
022     * @author Michael C. Han
023     */
024    public class ThreadLocalAwareBackgroundTaskExecutor
025            extends DelegatingBackgroundTaskExecutor {
026    
027            public ThreadLocalAwareBackgroundTaskExecutor(
028                    BackgroundTaskExecutor backgroundTaskExecutor,
029                    BackgroundTaskThreadLocalManager backgroundTaskThreadLocalManager) {
030    
031                    super(backgroundTaskExecutor);
032    
033                    _backgroundTaskThreadLocalManager = backgroundTaskThreadLocalManager;
034            }
035    
036            @Override
037            public BackgroundTaskExecutor clone() {
038                    BackgroundTaskExecutor backgroundTaskExecutor =
039                            new ThreadLocalAwareBackgroundTaskExecutor(
040                                    getBackgroundTaskExecutor(), _backgroundTaskThreadLocalManager);
041    
042                    return backgroundTaskExecutor;
043            }
044    
045            @Override
046            public BackgroundTaskResult execute(BackgroundTask backgroundTask)
047                    throws Exception {
048    
049                    Map<String, Serializable> threadLocalValues =
050                            _backgroundTaskThreadLocalManager.getThreadLocalValues();
051    
052                    try {
053                            _backgroundTaskThreadLocalManager.deserializeThreadLocals(
054                                    backgroundTask.getTaskContextMap());
055    
056                            return super.execute(backgroundTask);
057                    }
058                    finally {
059                            _backgroundTaskThreadLocalManager.setThreadLocalValues(
060                                    threadLocalValues);
061                    }
062            }
063    
064            private final BackgroundTaskThreadLocalManager
065                    _backgroundTaskThreadLocalManager;
066    
067    }