001    /**
002     * Copyright (c) 2000-2013 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            @Override
035            public void addPollerCometDelayedTask(
036                    PollerCometDelayedTask pollerCometDelayedTask) {
037    
038                    synchronized (_pollerCometDelayedTasks) {
039                            if (_timer == null) {
040                                    _timer = new Timer(PollerCometDelayedJobImpl.class.getName());
041    
042                                    _timer.schedule(
043                                            new PollerCometTimerTask(),
044                                            PropsValues.POLLER_NOTIFICATIONS_TIMEOUT);
045                            }
046    
047                            _pollerCometDelayedTasks.add(pollerCometDelayedTask);
048                    }
049            }
050    
051            @Override
052            protected synchronized void doReceive(Message message) throws Exception {
053                    synchronized (_pollerCometDelayedTasks) {
054                            for (PollerCometDelayedTask pollerCometDelayedTask :
055                                            _pollerCometDelayedTasks) {
056    
057                                    try {
058                                            pollerCometDelayedTask.executeTask();
059                                    }
060                                    catch (Exception e) {
061                                            if (_log.isWarnEnabled()) {
062                                                    _log.warn("Unable to do task" + e);
063                                            }
064                                    }
065                            }
066    
067                            _pollerCometDelayedTasks.clear();
068                    }
069            }
070    
071            private static Log _log = LogFactoryUtil.getLog(
072                    PollerCometDelayedJobImpl.class);
073    
074            private List<PollerCometDelayedTask> _pollerCometDelayedTasks =
075                    new LinkedList<PollerCometDelayedTask>();
076            private Timer _timer;
077    
078            private class PollerCometTimerTask extends TimerTask {
079    
080                    @Override
081                    public void run() {
082                            synchronized (_pollerCometDelayedTasks) {
083                                    for (PollerCometDelayedTask pollerCometDelayedTask :
084                                                    _pollerCometDelayedTasks) {
085    
086                                            try {
087                                                    pollerCometDelayedTask.executeTask();
088                                            }
089                                            catch (Exception e) {
090                                                    if (_log.isWarnEnabled()) {
091                                                            _log.warn("Unable to do task" + e);
092                                                    }
093                                            }
094                                    }
095    
096                                    _pollerCometDelayedTasks.clear();
097                            }
098                    }
099            }
100    
101    }