1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.scheduler.messaging;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.messaging.Message;
28  import com.liferay.portal.kernel.messaging.MessageListener;
29  import com.liferay.portal.kernel.messaging.sender.MessageSender;
30  import com.liferay.portal.kernel.scheduler.SchedulerEngine;
31  import com.liferay.portal.kernel.scheduler.messaging.SchedulerRequest;
32  
33  import java.util.List;
34  
35  /**
36   * <a href="SchedulerMessageListener.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Michael C. Han
39   * @author Bruno Farache
40   *
41   */
42  public class SchedulerMessageListener implements MessageListener {
43  
44      public SchedulerMessageListener(
45          MessageSender messageSender, SchedulerEngine schedulerEngine) {
46  
47          _messageSender = messageSender;
48          _schedulerEngine = schedulerEngine;
49      }
50  
51      public void receive(Message message) {
52          try {
53              doReceive(message);
54          }
55          catch (Exception e) {
56              _log.error("Unable to process message " + message, e);
57          }
58      }
59  
60      protected void doReceive(Message message) throws Exception {
61          SchedulerRequest schedulerRequest =
62              (SchedulerRequest)message.getPayload();
63  
64          String command = schedulerRequest.getCommand();
65  
66          if (command.equals(SchedulerRequest.COMMAND_REGISTER)) {
67              _schedulerEngine.schedule(
68                  schedulerRequest.getGroupName(), schedulerRequest.getCronText(),
69                  schedulerRequest.getStartDate(), schedulerRequest.getEndDate(),
70                  schedulerRequest.getDescription(),
71                  schedulerRequest.getDestination(),
72                  schedulerRequest.getMessageBody());
73          }
74          else if (command.equals(SchedulerRequest.COMMAND_RETRIEVE)) {
75              doCommandRetrieve(message, schedulerRequest);
76          }
77          else if (command.equals(SchedulerRequest.COMMAND_SHUTDOWN)) {
78              _schedulerEngine.shutdown();
79          }
80          else if (command.equals(SchedulerRequest.COMMAND_STARTUP)) {
81              _schedulerEngine.start();
82          }
83          else if (command.equals(SchedulerRequest.COMMAND_UNREGISTER)) {
84              _schedulerEngine.unschedule(
85                  schedulerRequest.getJobName(), schedulerRequest.getGroupName());
86          }
87      }
88  
89      protected void doCommandRetrieve(
90              Message message, SchedulerRequest schedulerRequest)
91          throws Exception {
92  
93          List<SchedulerRequest> schedulerRequests =
94              _schedulerEngine.getScheduledJobs(schedulerRequest.getGroupName());
95  
96          message.setPayload(schedulerRequests);
97  
98          _messageSender.send(message.getResponseDestination(), message);
99      }
100 
101     private static Log _log =
102          LogFactoryUtil.getLog(SchedulerMessageListener.class);
103 
104     private MessageSender _messageSender;
105     private SchedulerEngine _schedulerEngine;
106 
107 }