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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.mina.example.chat.client;
21  
22  import org.apache.mina.common.IoFilter;
23  import org.apache.mina.common.IoHandler;
24  import org.apache.mina.common.IoHandlerAdapter;
25  import org.apache.mina.common.IoSession;
26  import org.apache.mina.example.chat.ChatCommand;
27  import org.apache.mina.filter.LoggingFilter;
28  import org.apache.mina.filter.codec.ProtocolCodecFilter;
29  import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
30  
31  /**
32   * {@link IoHandler} implementation of the client side of the simple chat protocol.
33   * 
34   * @author The Apache Directory Project (mina-dev@directory.apache.org)
35   * @version $Rev$, $Date$
36   */
37  public class SwingChatClientHandler extends IoHandlerAdapter {
38  
39      public interface Callback {
40          void connected();
41  
42          void loggedIn();
43  
44          void loggedOut();
45  
46          void disconnected();
47  
48          void messageReceived(String message);
49  
50          void error(String message);
51      }
52  
53      private static IoFilter LOGGING_FILTER = new LoggingFilter();
54  
55      private static IoFilter CODEC_FILTER = new ProtocolCodecFilter(
56              new TextLineCodecFactory());
57  
58      private final Callback callback;
59  
60      public SwingChatClientHandler(Callback callback) {
61          this.callback = callback;
62      }
63  
64      public void sessionCreated(IoSession session) throws Exception {
65          session.getFilterChain().addLast("codec", CODEC_FILTER);
66          session.getFilterChain().addLast("logger", LOGGING_FILTER);
67      }
68  
69      public void sessionOpened(IoSession session) throws Exception {
70          callback.connected();
71      }
72  
73      public void messageReceived(IoSession session, Object message)
74              throws Exception {
75          String theMessage = (String) message;
76          String[] result = theMessage.split(" ", 3);
77          String status = result[1];
78          String theCommand = result[0];
79          ChatCommand command = ChatCommand.valueOf(theCommand);
80  
81          if ("OK".equals(status)) {
82  
83              switch (command.toInt()) {
84  
85              case ChatCommand.BROADCAST:
86                  if (result.length == 3) {
87                      callback.messageReceived(result[2]);
88                  }
89                  break;
90              case ChatCommand.LOGIN:
91                  callback.loggedIn();
92                  break;
93  
94              case ChatCommand.QUIT:
95                  callback.loggedOut();
96                  break;
97              }
98  
99          } else {
100             if (result.length == 3) {
101                 callback.error(result[2]);
102             }
103         }
104     }
105 
106     public void sessionClosed(IoSession session) throws Exception {
107         callback.disconnected();
108     }
109 
110 }