iohandleradapter.java

mina是以Java实现的一个开源的网络程序框架

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 */
package org.apache.mina.core.service;

import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * An abstract adapter class for {@link IoHandler}.  You can extend this
 * class and selectively override required event handler methods only.  All
 * methods do nothing by default.
 *
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (Thu, 26 Jun 2008) $
 */
public class IoHandlerAdapter implements IoHandler {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    public void sessionCreated(IoSession session) throws Exception {
    }

    public void sessionOpened(IoSession session) throws Exception {
    }

    public void sessionClosed(IoSession session) throws Exception {
    }

    public void sessionIdle(IoSession session, IdleStatus status)
            throws Exception {
    }

    public void exceptionCaught(IoSession session, Throwable cause)
            throws Exception {
        if (logger.isWarnEnabled()) {
            logger.warn("EXCEPTION, please implement "
                    + getClass().getName()
                    + ".exceptionCaught() for proper handling:", cause);
        }
    }

    public void messageReceived(IoSession session, Object message)
            throws Exception {
    }

    public void messageSent(IoSession session, Object message) throws Exception {
    }
}