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.slf4j.Logger; 23 import org.slf4j.LoggerFactory; 24 25 26 /** 27 * An abstract adapter class for {@link IoHandler}. You can extend this 28 * class and selectively override required event handler methods only. All 29 * methods do nothing by default. 30 * 31 * @author The Apache MINA Project (dev@mina.apache.org) 32 * @version $Rev: 616100 $, $Date: 2008-01-28 15:58:32 -0700 (Mon, 28 Jan 2008) $ 33 */ 34 public class IoHandlerAdapter implements IoHandler { 35 36 private final Logger logger = LoggerFactory.getLogger(getClass()); 37 38 public void sessionCreated(IoSession session) throws Exception { 39 } 40 41 public void sessionOpened(IoSession session) throws Exception { 42 } 43 44 public void sessionClosed(IoSession session) throws Exception { 45 } 46 47 public void sessionIdle(IoSession session, IdleStatus status) 48 throws Exception { 49 } 50 51 public void exceptionCaught(IoSession session, Throwable cause) 52 throws Exception { 53 if (logger.isWarnEnabled()) { 54 logger.warn("EXCEPTION, please implement " 55 + getClass().getName() 56 + ".exceptionCaught() for proper handling:", cause); 57 } 58 } 59 60 public void messageReceived(IoSession session, Object message) 61 throws Exception { 62 } 63 64 public void messageSent(IoSession session, Object message) throws Exception { 65 } 66 }