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.tennis;
021
022import org.apache.mina.core.service.IoHandler;
023import org.apache.mina.core.service.IoHandlerAdapter;
024import org.apache.mina.core.session.IoSession;
025
026/**
027 * A {@link IoHandler} implementation which plays a tennis game.
028 *
029 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
030 */
031public class TennisPlayer extends IoHandlerAdapter {
032    private static int nextId = 0;
033
034    /** Player ID **/
035    private final int id = nextId++;
036
037    @Override
038    public void sessionOpened(IoSession session) {
039        System.out.println("Player-" + id + ": READY");
040    }
041
042    @Override
043    public void sessionClosed(IoSession session) {
044        System.out.println("Player-" + id + ": QUIT");
045    }
046
047    @Override
048    public void messageReceived(IoSession session, Object message) {
049        System.out.println("Player-" + id + ": RCVD " + message);
050
051        TennisBall ball = (TennisBall) message;
052
053        // Stroke: TTL decreases and PING/PONG state changes.
054        ball = ball.stroke();
055
056        if (ball.getTTL() > 0) {
057            // If the ball is still alive, pass it back to peer.
058            session.write(ball);
059        } else {
060            // If the ball is dead, this player loses.
061            System.out.println("Player-" + id + ": LOSE");
062            session.closeNow();
063        }
064    }
065
066    @Override
067    public void messageSent(IoSession session, Object message) {
068        System.out.println("Player-" + id + ": SENT " + message);
069    }
070
071    @Override
072    public void exceptionCaught(IoSession session, Throwable cause) {
073        cause.printStackTrace();
074        session.closeNow();
075    }
076}