001    /**
002     * Copyright (c) 2000-2010 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.scheduler.messaging;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.messaging.Message;
020    import com.liferay.portal.kernel.messaging.MessageBusUtil;
021    import com.liferay.portal.kernel.messaging.MessageListener;
022    import com.liferay.portal.kernel.messaging.sender.MessageSender;
023    import com.liferay.portal.kernel.scheduler.SchedulerEngine;
024    import com.liferay.portal.kernel.scheduler.messaging.SchedulerRequest;
025    
026    import java.util.List;
027    
028    /**
029     * @author Michael C. Han
030     * @author Bruno Farache
031     * @author Shuyang Zhou
032     */
033    public class SchedulerMessageListener implements MessageListener {
034    
035            public SchedulerMessageListener() {
036            }
037    
038            /**
039             * @deprecated
040             */
041            public SchedulerMessageListener(
042                    MessageSender messageSender, SchedulerEngine schedulerEngine) {
043    
044                    _messageSender = messageSender;
045                    _schedulerEngine = schedulerEngine;
046            }
047    
048            public void receive(Message message) {
049                    try {
050                            doReceive(message);
051                    }
052                    catch (Exception e) {
053                            _log.error("Unable to process message " + message, e);
054                    }
055            }
056    
057            public void setMessageSender(MessageSender messageSender) {
058                    _messageSender = messageSender;
059            }
060    
061            public void setSchedulerEngine(SchedulerEngine schedulerEngine) {
062                    _schedulerEngine = schedulerEngine;
063            }
064    
065            protected void doReceive(Message message) throws Exception {
066                    SchedulerRequest schedulerRequest =
067                            (SchedulerRequest)message.getPayload();
068    
069                    String command = schedulerRequest.getCommand();
070    
071                    if (command.equals(SchedulerRequest.COMMAND_REGISTER)) {
072                            _schedulerEngine.schedule(
073                                    schedulerRequest.getTrigger(),
074                                    schedulerRequest.getDescription(),
075                                    schedulerRequest.getDestination(),
076                                    schedulerRequest.getMessage());
077                    }
078                    else if (command.equals(SchedulerRequest.COMMAND_RETRIEVE)) {
079                            doCommandRetrieve(message, schedulerRequest);
080                    }
081                    else if (command.equals(SchedulerRequest.COMMAND_SHUTDOWN)) {
082                            _schedulerEngine.shutdown();
083                    }
084                    else if (command.equals(SchedulerRequest.COMMAND_STARTUP)) {
085                            _schedulerEngine.start();
086                    }
087                    else if (command.equals(SchedulerRequest.COMMAND_UNREGISTER)) {
088                            _schedulerEngine.unschedule(schedulerRequest.getTrigger());
089                    }
090            }
091    
092            protected void doCommandRetrieve(
093                            Message message, SchedulerRequest schedulerRequest)
094                    throws Exception {
095    
096                    List<SchedulerRequest> schedulerRequests =
097                            _schedulerEngine.getScheduledJobs(
098                                    schedulerRequest.getTrigger().getGroupName());
099    
100                    Message responseMessage = MessageBusUtil.createResponseMessage(
101                            message, schedulerRequests);
102    
103                    _messageSender.send(
104                            responseMessage.getDestinationName(), responseMessage);
105            }
106    
107            private static Log _log = LogFactoryUtil.getLog(
108                    SchedulerMessageListener.class);
109    
110            private MessageSender _messageSender;
111            private SchedulerEngine _schedulerEngine;
112    
113    }