View Javadoc

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.gettingstarted.timeserver;
21  
22  import java.util.Date;
23  
24  import org.apache.mina.core.service.IoHandlerAdapter;
25  import org.apache.mina.core.session.IdleStatus;
26  import org.apache.mina.core.session.IoSession;
27  
28  /**
29   * The Time Server handler : it return the current date when a message is received,
30   * or close the session if the "quit" message is received.
31   * 
32   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
33   */
34  public class TimeServerHandler extends IoHandlerAdapter
35  {
36      /**
37       * Trap exceptions.
38       */
39      @Override
40      public void exceptionCaught( IoSession session, Throwable cause ) throws Exception
41      {
42          cause.printStackTrace();
43      }
44  
45      /**
46       * If the message is 'quit', we exit by closing the session. Otherwise,
47       * we return the current date.
48       */
49      @Override
50      public void messageReceived( IoSession session, Object message ) throws Exception
51      {
52          String str = message.toString();
53          
54          if( str.trim().equalsIgnoreCase("quit") ) {
55              // "Quit" ? let's get out ...
56              session.close(true);
57              return;
58          }
59  
60          // Send the current date back to the client
61          Date date = new Date();
62          session.write( date.toString() );
63          System.out.println("Message written...");
64      }
65  
66      /**
67       * On idle, we just write a message on the console
68       */
69      @Override
70      public void sessionIdle( IoSession session, IdleStatus status ) throws Exception
71      {
72          System.out.println( "IDLE " + session.getIdleCount( status ));
73      }
74  }