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Java > Open Source Codes > org > apache > mina > common > IoHandlerAdapter


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.common;
21
22 import org.apache.mina.util.SessionLog;
23 import org.apache.mina.util.SessionUtil;
24
25 /**
26  * An abstract adapter class for {@link IoHandler}. You can extend this
27  * class and selectively override required event handler methods only. All
28  * methods do nothing by default.
29  *
30  * @author The Apache Directory Project (mina-dev@directory.apache.org)
31  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $
32  */
33 public class IoHandlerAdapter implements IoHandler {
34     public void sessionCreated(IoSession session) throws Exception JavaDoc {
35         SessionUtil.initialize(session);
36     }
37
38     public void sessionOpened(IoSession session) throws Exception JavaDoc {
39     }
40
41     public void sessionClosed(IoSession session) throws Exception JavaDoc {
42     }
43
44     public void sessionIdle(IoSession session, IdleStatus status)
45             throws Exception JavaDoc {
46     }
47
48     public void exceptionCaught(IoSession session, Throwable JavaDoc cause)
49             throws Exception JavaDoc {
50         if (SessionLog.isWarnEnabled(session)) {
51             SessionLog.warn(session, "EXCEPTION, please implement "
52                     + getClass().getName()
53                     + ".exceptionCaught() for proper handling:", cause);
54         }
55     }
56
57     public void messageReceived(IoSession session, Object JavaDoc message)
58             throws Exception JavaDoc {
59     }
60
61     public void messageSent(IoSession session, Object JavaDoc message) throws Exception JavaDoc {
62     }
63 }
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