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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.echoserver;
21  
22  import org.apache.mina.common.ByteBuffer;
23  import org.apache.mina.common.IdleStatus;
24  import org.apache.mina.common.IoHandler;
25  import org.apache.mina.common.IoHandlerAdapter;
26  import org.apache.mina.common.IoSession;
27  import org.apache.mina.common.TransportType;
28  import org.apache.mina.filter.SSLFilter;
29  import org.apache.mina.transport.socket.nio.SocketSessionConfig;
30  import org.slf4j.Logger;
31  import org.slf4j.LoggerFactory;
32  
33  /**
34   * {@link IoHandler} implementation for echo server. 
35   * 
36   * @author The Apache Directory Project (mina-dev@directory.apache.org)
37   * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $,
38   */
39  public class EchoProtocolHandler extends IoHandlerAdapter {
40      private static final Logger log = LoggerFactory
41              .getLogger(EchoProtocolHandler.class);
42  
43      public void sessionCreated(IoSession session) {
44          if (session.getTransportType() == TransportType.SOCKET) {
45              ((SocketSessionConfig) session.getConfig())
46                      .setReceiveBufferSize(2048);
47          }
48  
49          session.setIdleTime(IdleStatus.BOTH_IDLE, 10);
50  
51          // We're going to use SSL negotiation notification.
52          session.setAttribute(SSLFilter.USE_NOTIFICATION);
53      }
54  
55      public void sessionIdle(IoSession session, IdleStatus status) {
56          log.info("*** IDLE #" + session.getIdleCount(IdleStatus.BOTH_IDLE)
57                  + " ***");
58      }
59  
60      public void exceptionCaught(IoSession session, Throwable cause) {
61          cause.printStackTrace();
62          session.close();
63      }
64  
65      public void messageReceived(IoSession session, Object message)
66              throws Exception {
67          if (!(message instanceof ByteBuffer)) {
68              return;
69          }
70  
71          ByteBuffer rb = (ByteBuffer) message;
72          // Write the received data back to remote peer
73          ByteBuffer wb = ByteBuffer.allocate(rb.remaining());
74          wb.put(rb);
75          wb.flip();
76          session.write(wb);
77      }
78  }