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    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.example.tennis;
    21
    22  import org.apache.mina.common.IoHandler;
    23  import org.apache.mina.common.IoHandlerAdapter;
    24  import org.apache.mina.common.IoSession;
    25
    26  /**
    27   * A {@link IoHandler} implementation which plays a tennis game.
    28   *
    29   * @author The Apache Directory Project (mina-dev@directory.apache.org)
    30   * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $
    31   */
    32  public class TennisPlayer extends IoHandlerAdapter {
    33      private static int nextId = 0;
    34
    35      /** Player ID **/
    36      private final int id = nextId++;
    37
    38      public void sessionOpened(IoSession session) {
    39          System.out.println("Player-" + id + ": READY");
    40      }
    41
    42      public void sessionClosed(IoSession session) {
    43          System.out.println("Player-" + id + ": QUIT");
    44      }
    45
    46      public void messageReceived(IoSession session, Object message) {
    47          System.out.println("Player-" + id + ": RCVD " + message);
    48
    49          TennisBall ball = (TennisBall) message;
    50
    51          // Stroke: TTL decreases and PING/PONG state changes.
    52          ball = ball.stroke();
    53
    54          if (ball.getTTL() > 0) {
    55              // If the ball is still alive, pass it back to peer.
    56              session.write(ball);
    57          } else {
    58              // If the ball is dead, this player loses.
    59              System.out.println("Player-" + id + ": LOSE");
    60              session.close();
    61          }
    62      }
    63
    64      public void messageSent(IoSession session, Object message) {
    65          System.out.println("Player-" + id + ": SENT " + message);
    66      }
    67
    68      public void exceptionCaught(IoSession session, Throwable cause) {
    69          cause.printStackTrace();
    70          session.close();
    71      }
    72  }