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