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.poller.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.MessageBusUtil;
29  import com.liferay.portal.kernel.messaging.MessageListener;
30  import com.liferay.portal.kernel.poller.PollerException;
31  import com.liferay.portal.kernel.poller.PollerProcessor;
32  import com.liferay.portal.kernel.poller.PollerRequest;
33  import com.liferay.portal.kernel.poller.PollerResponse;
34  import com.liferay.portal.kernel.util.Validator;
35  import com.liferay.portal.poller.PollerProcessorUtil;
36  
37  /**
38   * <a href="PollerMessageListener.java.html"><b><i>View Source</i></b></a>
39   *
40   * @author Michael C. Han
41   */
42  public class PollerMessageListener implements MessageListener {
43  
44      public void receive(Message message) {
45          PollerResponse pollerResponse = null;
46  
47          try {
48              PollerRequest pollerRequest = (PollerRequest)message.getPayload();
49  
50              String portletId = pollerRequest.getPortletId();
51  
52              PollerProcessor pollerProcessor =
53                  PollerProcessorUtil.getPollerProcessor(portletId);
54  
55              if (pollerRequest.isReceiveRequest()) {
56                  pollerResponse = new PollerResponse(
57                      portletId, pollerRequest.getChunkId());
58  
59                  try {
60                      pollerProcessor.receive(pollerRequest, pollerResponse);
61                  }
62                  catch (PollerException pe) {
63                      _log.error(
64                          "Unable to receive poller request " + pollerRequest,
65                          pe);
66  
67                      pollerResponse.setParameter(
68                          "pollerException", pe.getMessage());
69                  }
70              }
71              else {
72                  try {
73                      pollerProcessor.send(pollerRequest);
74                  }
75                  catch (PollerException pe) {
76                      _log.error(
77                          "Unable to send poller request " + pollerRequest,
78                          pe);
79                  }
80              }
81          }
82          finally {
83              String responseDestinationName =
84                  message.getResponseDestinationName();
85  
86              if (Validator.isNotNull(responseDestinationName)) {
87                  Message responseMessage = MessageBusUtil.createResponseMessage(
88                      message);
89  
90                  responseMessage.setPayload(pollerResponse);
91  
92                  MessageBusUtil.sendMessage(
93                      responseDestinationName, responseMessage);
94              }
95          }
96      }
97  
98      private static Log _log =
99          LogFactoryUtil.getLog(PollerMessageListener.class);
100 
101 }