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.chat.client;
021
022import org.apache.mina.core.service.IoHandler;
023import org.apache.mina.core.service.IoHandlerAdapter;
024import org.apache.mina.core.session.IoSession;
025import org.apache.mina.example.chat.ChatCommand;
026
027/**
028 * {@link IoHandler} implementation of the client side of the simple chat protocol.
029 *
030 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
031 */
032public class SwingChatClientHandler extends IoHandlerAdapter {
033
034    public interface Callback {
035        void connected();
036
037        void loggedIn();
038
039        void loggedOut();
040
041        void disconnected();
042
043        void messageReceived(String message);
044
045        void error(String message);
046    }
047
048    private final Callback callback;
049
050    public SwingChatClientHandler(Callback callback) {
051        this.callback = callback;
052    }
053
054    @Override
055    public void sessionOpened(IoSession session) throws Exception {
056        callback.connected();
057    }
058
059    @Override
060    public void messageReceived(IoSession session, Object message)
061            throws Exception {
062        String theMessage = (String) message;
063        String[] result = theMessage.split(" ", 3);
064        String status = result[1];
065        String theCommand = result[0];
066        ChatCommand command = ChatCommand.valueOf(theCommand);
067
068        if ("OK".equals(status)) {
069
070            switch (command.toInt()) {
071
072            case ChatCommand.BROADCAST:
073                if (result.length == 3) {
074                    callback.messageReceived(result[2]);
075                }
076                break;
077            case ChatCommand.LOGIN:
078                callback.loggedIn();
079                break;
080
081            case ChatCommand.QUIT:
082                callback.loggedOut();
083                break;
084            }
085
086        } else {
087            if (result.length == 3) {
088                callback.error(result[2]);
089            }
090        }
091    }
092
093    @Override
094    public void sessionClosed(IoSession session) throws Exception {
095        callback.disconnected();
096    }
097
098}