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.kernel.messaging;
24  
25  /**
26   * <a href="StringResponseMessageListener.java.html"><b><i>View Source</i></b>
27   * </a>
28   *
29   * @author Brian Wing Shun Chan
30   *
31   */
32  public class StringResponseMessageListener implements MessageListener {
33  
34      public StringResponseMessageListener(
35          Destination destination, Destination responseDestination,
36          String responseId, long timeout) {
37  
38          _destination = destination;
39          _responseDestination = responseDestination;
40          _responseId = responseId;
41          _timeout = timeout;
42      }
43  
44      public synchronized String send(String message) throws MessageBusException {
45          if (message.equals(_EMTPY_MESSAGE)) {
46              StringBuilder sb = new StringBuilder();
47  
48              sb.append("{\"lfrResponseDestination\":\"");
49              sb.append(_responseDestination.getName());
50              sb.append("\",\"lfrResponseId\":\"");
51              sb.append(_responseId);
52              sb.append("\"}");
53  
54              message = sb.toString();
55          }
56          else {
57              StringBuilder sb = new StringBuilder();
58  
59              sb.append(message.substring(0, message.length() - 1));
60              sb.append(",\"lfrResponseDestination\":\"");
61              sb.append(_responseDestination.getName());
62              sb.append("\",\"lfrResponseId\":\"");
63              sb.append(_responseId);
64              sb.append("\"}");
65  
66              message = sb.toString();
67          }
68  
69          _destination.send(message);
70  
71          try {
72              wait(_timeout);
73          }
74          catch (InterruptedException ie) {
75              throw new MessageBusException(
76                  "Unable to receive response for request", ie);
77          }
78  
79          if (_responseMessage == null) {
80              throw new MessageBusException(
81                  "No reply received for request: " + message);
82          }
83  
84          return _responseMessage;
85      }
86  
87      public void receive(Object message) {
88          throw new UnsupportedOperationException();
89      }
90  
91      public synchronized void receive(String message) {
92          if (message.indexOf(
93                  "\"lfrResponseId\":\"" + _responseId + "\"") != -1) {
94  
95              _responseMessage = message;
96  
97              notify();
98          }
99      }
100 
101     private static final String _EMTPY_MESSAGE = "{}";
102 
103     private Destination _destination;
104     private Destination _responseDestination;
105     private String _responseId;
106     private long _timeout;
107     private String _responseMessage;
108 
109 }