001    /**
002     * Copyright (c) 2000-2012 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.poller.comet;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.messaging.BaseMessageListener;
020    import com.liferay.portal.kernel.messaging.Message;
021    import com.liferay.portal.util.PropsValues;
022    
023    import java.util.LinkedList;
024    import java.util.List;
025    import java.util.Timer;
026    import java.util.TimerTask;
027    
028    /**
029     * @author Edward Han
030     */
031    public class PollerCometDelayedJobImpl
032            extends BaseMessageListener implements PollerCometDelayedJob {
033    
034            public void addPollerCometDelayedTask(
035                    PollerCometDelayedTask pollerCometDelayedTask) {
036    
037                    synchronized (_pollerCometDelayedTasks) {
038                            if (_timer == null) {
039                                    _timer = new Timer(PollerCometDelayedJobImpl.class.getName());
040    
041                                    _timer.schedule(
042                                            new PollerCometTimerTask(),
043                                            PropsValues.POLLER_NOTIFICATIONS_TIMEOUT);
044                            }
045    
046                            _pollerCometDelayedTasks.add(pollerCometDelayedTask);
047                    }
048            }
049    
050            @Override
051            protected synchronized void doReceive(Message message) throws Exception {
052                    synchronized (_pollerCometDelayedTasks) {
053                            for (PollerCometDelayedTask pollerCometDelayedTask :
054                                            _pollerCometDelayedTasks) {
055    
056                                    try {
057                                            pollerCometDelayedTask.executeTask();
058                                    }
059                                    catch (Exception e) {
060                                            if (_log.isWarnEnabled()) {
061                                                    _log.warn("Unable to do task" + e);
062                                            }
063                                    }
064                            }
065    
066                            _pollerCometDelayedTasks.clear();
067                    }
068            }
069    
070            private static Log _log = LogFactoryUtil.getLog(
071                    PollerCometDelayedJob.class);
072    
073            private List<PollerCometDelayedTask> _pollerCometDelayedTasks =
074                    new LinkedList<PollerCometDelayedTask>();
075            private Timer _timer;
076    
077            private class PollerCometTimerTask extends TimerTask {
078    
079                    @Override
080                    public void run() {
081                            synchronized (_pollerCometDelayedTasks) {
082                                    for (PollerCometDelayedTask pollerCometDelayedTask :
083                                                    _pollerCometDelayedTasks) {
084    
085                                            try {
086                                                    pollerCometDelayedTask.executeTask();
087                                            }
088                                            catch (Exception e) {
089                                                    if (_log.isWarnEnabled()) {
090                                                            _log.warn("Unable to do task" + e);
091                                                    }
092                                            }
093                                    }
094    
095                                    _pollerCometDelayedTasks.clear();
096                            }
097                    }
098            }
099    
100    }