1   /**
2    * Copyright (c) 2000-2008 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.search.lucene.messaging;
24  
25  import com.liferay.portal.kernel.messaging.Message;
26  import com.liferay.portal.kernel.messaging.MessageListener;
27  import com.liferay.portal.kernel.messaging.sender.MessageSender;
28  import com.liferay.portal.kernel.search.Hits;
29  import com.liferay.portal.kernel.search.messaging.SearchRequest;
30  import com.liferay.portal.search.lucene.LuceneSearchEngineUtil;
31  
32  import org.apache.commons.logging.Log;
33  import org.apache.commons.logging.LogFactory;
34  
35  /**
36   * <a href="LuceneReaderMessageListener.java.html"><b><i>View Source</i></b></a>
37   *
38   * @author Bruno Farache
39   *
40   */
41  public class LuceneReaderMessageListener implements MessageListener {
42  
43      public LuceneReaderMessageListener(MessageSender messageSender) {
44          _messageSender = messageSender;
45      }
46  
47      public void receive(Message message) {
48          try {
49              doReceive(message);
50          }
51          catch (Exception e) {
52              _log.error("Unable to process message " + message, e);
53          }
54      }
55  
56      public void doReceive(Message message) throws Exception {
57          Object payload = message.getPayload();
58  
59          if (!LuceneSearchEngineUtil.isRegistered() ||
60              !(payload instanceof SearchRequest)) {
61  
62              return;
63          }
64  
65          SearchRequest searchRequest = (SearchRequest)payload;
66  
67          String command = searchRequest.getCommand();
68  
69          if (command.equals(SearchRequest.COMMAND_INDEX_ONLY)) {
70              doCommandIndexOnly(message);
71          }
72          else if (command.equals(SearchRequest.COMMAND_SEARCH)) {
73              doCommandSearch(message, searchRequest);
74          }
75      }
76  
77      protected void doCommandIndexOnly(Message message)
78          throws Exception {
79  
80          Boolean indexReadOnly = Boolean.valueOf(
81              LuceneSearchEngineUtil.isIndexReadOnly());
82  
83          message.setPayload(indexReadOnly);
84  
85          _messageSender.send(message.getResponseDestination(), message);
86      }
87  
88      protected void doCommandSearch(Message message, SearchRequest searchRequest)
89          throws Exception {
90  
91          Hits hits = LuceneSearchEngineUtil.search(
92              searchRequest.getCompanyId(), searchRequest.getQuery(),
93              searchRequest.getSorts(), searchRequest.getStart(),
94              searchRequest.getEnd());
95  
96          message.setPayload(hits);
97  
98          _messageSender.send(message.getResponseDestination(), message);
99      }
100 
101     private static Log _log =
102         LogFactory.getLog(LuceneReaderMessageListener.class);
103 
104     private MessageSender _messageSender;
105 
106 }