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.MessageBusUtil;
27  import com.liferay.portal.kernel.messaging.MessageListener;
28  import com.liferay.portal.kernel.search.Hits;
29  import com.liferay.portal.kernel.search.messaging.SearchRequest;
30  import com.liferay.portal.kernel.util.Validator;
31  import com.liferay.portal.search.lucene.LuceneSearchEngineUtil;
32  
33  import org.apache.commons.logging.Log;
34  import org.apache.commons.logging.LogFactory;
35  
36  /**
37   * <a href="LuceneReaderMessageListener.java.html"><b><i>View Source</i></b></a>
38   *
39   * @author Bruno Farache
40   *
41   */
42  public class LuceneReaderMessageListener implements MessageListener {
43  
44      public void receive(Object message) {
45          try {
46              doReceive((Message)message);
47          }
48          catch (Exception e) {
49              _log.error("Unable to process message " + message, e);
50          }
51      }
52  
53      public void receive(String message) {
54          throw new UnsupportedOperationException();
55      }
56  
57      public void doReceive(Message message) throws Exception {
58          String responseDestination = message.getResponseDestination();
59          String responseId = message.getResponseId();
60  
61          SearchRequest searchRequest = (SearchRequest)message.getRequestValue();
62  
63          String command = searchRequest.getCommand();
64  
65          if (command.equals(SearchRequest.COMMAND_INDEX_ONLY) &&
66              Validator.isNotNull(responseDestination) &&
67              Validator.isNotNull(responseId)) {
68  
69              doCommandIndexOnly(message);
70          }
71          else if (command.equals(SearchRequest.COMMAND_SEARCH) &&
72                   Validator.isNotNull(responseDestination) &&
73                   Validator.isNotNull(responseId)) {
74  
75              doCommandSearch(message, searchRequest);
76          }
77      }
78  
79      protected void doCommandIndexOnly(Message message)
80          throws Exception {
81  
82          boolean indexOnly = LuceneSearchEngineUtil.isIndexReadOnly();
83  
84          message.setResponseValue(Boolean.valueOf(indexOnly));
85  
86          MessageBusUtil.sendMessage(message.getResponseDestination(), message);
87      }
88  
89      protected void doCommandSearch(Message message, SearchRequest searchRequest)
90          throws Exception {
91  
92          Hits hits = LuceneSearchEngineUtil.search(
93              searchRequest.getCompanyId(), searchRequest.getQuery(),
94              searchRequest.getSort(), searchRequest.getStart(),
95              searchRequest.getEnd());
96  
97          message.setResponseValue(hits);
98  
99          MessageBusUtil.sendMessage(message.getResponseDestination(), message);
100     }
101 
102     private static Log _log =
103         LogFactory.getLog(LuceneReaderMessageListener.class);
104 
105 }