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.core.service;
21
22 import org.apache.mina.core.session.IdleStatus;
23 import org.apache.mina.core.session.IoSession;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
26
27
28 /**
29 * An abstract adapter class for {@link IoHandler}. You can extend this
30 * class and selectively override required event handler methods only. All
31 * methods do nothing by default.
32 *
33 * @author The Apache MINA Project (dev@mina.apache.org)
34 * @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (jeu, 26 jun 2008) $
35 */
36 public class IoHandlerAdapter implements IoHandler {
37
38 private final Logger logger = LoggerFactory.getLogger(getClass());
39
40 public void sessionCreated(IoSession session) throws Exception {
41 }
42
43 public void sessionOpened(IoSession session) throws Exception {
44 }
45
46 public void sessionClosed(IoSession session) throws Exception {
47 }
48
49 public void sessionIdle(IoSession session, IdleStatus status)
50 throws Exception {
51 }
52
53 public void exceptionCaught(IoSession session, Throwable cause)
54 throws Exception {
55 if (logger.isWarnEnabled()) {
56 logger.warn("EXCEPTION, please implement "
57 + getClass().getName()
58 + ".exceptionCaught() for proper handling:", cause);
59 }
60 }
61
62 public void messageReceived(IoSession session, Object message)
63 throws Exception {
64 }
65
66 public void messageSent(IoSession session, Object message) throws Exception {
67 }
68 }