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.MessageBusUtil;
29  import com.liferay.portal.kernel.messaging.MessageListener;
30  import com.liferay.portal.kernel.messaging.sender.MessageSender;
31  import com.liferay.portal.kernel.search.Hits;
32  import com.liferay.portal.kernel.search.SearchEngine;
33  import com.liferay.portal.kernel.search.messaging.SearchRequest;
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 setSearchEngine(SearchEngine searchEngine) {
57          _searchEngine = searchEngine;
58      }
59  
60      protected void doCommandSearch(Message message, SearchRequest searchRequest)
61          throws Exception {
62  
63          Hits hits = _searchEngine.getSearcher().search(
64              searchRequest.getCompanyId(), searchRequest.getQuery(),
65              searchRequest.getSorts(), searchRequest.getStart(),
66              searchRequest.getEnd());
67  
68          Message responseMessage = MessageBusUtil.createResponseMessage(
69              message, hits);
70  
71          _messageSender.send(responseMessage.getDestination(), responseMessage);
72      }
73  
74      protected void doReceive(Message message) throws Exception {
75          Object payload = message.getPayload();
76  
77          if (!_searchEngine.isRegistered() ||
78              !(payload instanceof SearchRequest)) {
79  
80              return;
81          }
82  
83          SearchRequest searchRequest = (SearchRequest)payload;
84  
85          String command = searchRequest.getCommand();
86  
87          if (command.equals(SearchRequest.COMMAND_SEARCH)) {
88              doCommandSearch(message, searchRequest);
89          }
90      }
91  
92      private static Log _log =
93          LogFactoryUtil.getLog(LuceneReaderMessageListener.class);
94  
95      private MessageSender _messageSender;
96      private SearchEngine _searchEngine;
97  
98  }