001/*
002 *   Licensed to the Apache Software Foundation (ASF) under one
003 *   or more contributor license agreements.  See the NOTICE file
004 *   distributed with this work for additional information
005 *   regarding copyright ownership.  The ASF licenses this file
006 *   to you under the Apache License, Version 2.0 (the
007 *   "License"); you may not use this file except in compliance
008 *   with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *   Unless required by applicable law or agreed to in writing,
013 *   software distributed under the License is distributed on an
014 *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *   KIND, either express or implied.  See the License for the
016 *   specific language governing permissions and limitations
017 *   under the License.
018 *
019 */
020package org.apache.mina.example.gettingstarted.timeserver;
021
022import java.util.Date;
023
024import org.apache.mina.core.service.IoHandlerAdapter;
025import org.apache.mina.core.session.IdleStatus;
026import org.apache.mina.core.session.IoSession;
027
028/**
029 * The Time Server handler : it return the current date when a message is received,
030 * or close the session if the "quit" message is received.
031 * 
032 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
033 */
034public class TimeServerHandler extends IoHandlerAdapter
035{
036    /**
037     * Trap exceptions.
038     */
039    @Override
040    public void exceptionCaught( IoSession session, Throwable cause ) throws Exception
041    {
042        cause.printStackTrace();
043    }
044
045    /**
046     * If the message is 'quit', we exit by closing the session. Otherwise,
047     * we return the current date.
048     */
049    @Override
050    public void messageReceived( IoSession session, Object message ) throws Exception
051    {
052        String str = message.toString();
053        
054        if( str.trim().equalsIgnoreCase("quit") ) {
055            // "Quit" ? let's get out ...
056            session.closeNow();
057            return;
058        }
059
060        // Send the current date back to the client
061        Date date = new Date();
062        session.write( date.toString() );
063        System.out.println("Message written...");
064    }
065
066    /**
067     * On idle, we just write a message on the console
068     */
069    @Override
070    public void sessionIdle( IoSession session, IdleStatus status ) throws Exception
071    {
072        System.out.println( "IDLE " + session.getIdleCount( status ));
073    }
074}