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 (Fri, 13 Jul 2007) $
32 */
33 public class IoHandlerAdapter implements IoHandler {
34 public void sessionCreated(IoSession session) throws Exception {
35 SessionUtil.initialize(session);
36 }
37
38 public void sessionOpened(IoSession session) throws Exception {
39 }
40
41 public void sessionClosed(IoSession session) throws Exception {
42 }
43
44 public void sessionIdle(IoSession session, IdleStatus status)
45 throws Exception {
46 }
47
48 public void exceptionCaught(IoSession session, Throwable cause)
49 throws Exception {
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 message)
58 throws Exception {
59 }
60
61 public void messageSent(IoSession session, Object message) throws Exception {
62 }
63 }