1 /*
2 * @(#) $Id: ReverseProtocolHandler.java 332218 2005-11-10 03:52:42Z trustin $
3 *
4 * Copyright 2004 The Apache Software Foundation
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 */
19 package org.apache.mina.examples.reverser;
20
21 import org.apache.mina.protocol.ProtocolHandler;
22 import org.apache.mina.protocol.ProtocolHandlerAdapter;
23 import org.apache.mina.protocol.ProtocolSession;
24
25 /***
26 * {@link ProtocolHandler} implementation of reverser server protocol.
27 *
28 * @author The Apache Directory Project (dev@directory.apache.org)
29 * @version $Rev: 332218 $, $Date: 2005-11-10 12:52:42 +0900 $,
30 */
31 public class ReverseProtocolHandler extends ProtocolHandlerAdapter
32 {
33 public void exceptionCaught( ProtocolSession session, Throwable cause )
34 {
35 // Close connection when unexpected exception is caught.
36 session.close();
37 }
38
39 public void messageReceived( ProtocolSession session, Object message )
40 {
41 // Reverse reveiced string
42 String str = message.toString();
43 StringBuffer buf = new StringBuffer( str.length() );
44 for( int i = str.length() - 1; i >= 0; i-- )
45 {
46 buf.append( str.charAt( i ) );
47 }
48
49 // and write it back.
50 session.write( buf.toString() );
51 }
52 }