手机网络象棋开发(2)：网络通信、逻辑处理模块

上次简单介绍了Server的写法，这个类比较简单，主要的功能包括：
1. 初始化，包括玩家列表、游戏桌子列表
2. 接收手机客户端连接
3. 启动网络连接处理


今天主要介绍：网络通讯类和业务处理类

Network类：
主要负责：
1. 接收手机客户端的连接
   按照协议读取数据后，添加到消息队列
   此处需要处理同步问题
2. 取出消息队列，调用业务逻辑类进行处理
   主要是根据消息的cmdType
3. 发送消息
   依次读取发送消息队列的消息，
   按照协议，依次将cmdType, playerId, msg.length, msg 发送到客户端

具体代码如下：

/**
 * 
 */
package net.tuolian.newserver;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * @author sean
 * 
 * @since 2009/06/17
 * 
 *        1. 构造方法 
 *        2. init, 获得输入输出流 
 *        3. 启动线程
 * 
 *        问题： 1.全部读取服务器数据到Byte数组后，如何区别各个位数的内容 
 *        2. 如果光读取一个cmdType,然后由相应的方法来读取内容
 */
public class Network extends Thread {
	
	Socket socket;
	DataInputStream dis;
	DataOutputStream dos;
	public static List<Message> list = Collections.synchronizedList(new ArrayList<Message>());   //消息队列

	/**
	 * 构造函数
	 * 初始化
	 * @param socket
	 */
	public Network(Socket socket) {
		// TODO Auto-generated constructor stub
		this.socket = socket;
		init();
	}

	LogicHandler logic;
	/**
	 * 初始化，获得输入输出流
	 */
	private void init() {
		// TODO Auto-generated method stub
		try {
			dis = new DataInputStream(socket.getInputStream());
			dos = new DataOutputStream(socket.getOutputStream());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		logic = new LogicHandler(this);
	}

	/**
	 * 接收数据 逻辑处理
	 */
	public void run() {

		while (true) {
			// 接收客户端数据			
			recieveData();

			// 逻辑处理
//			handleLogic();
			logic.logicProcess();

			// 发送数据
			sendData();
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 接收来自客户端的数据
	 * 重构：
	 * 本方法只是负责读取数据
	 * 同时打包成msg, 放入msgList
	 * 
	 * @return
	 */
	private void recieveData() {
		// TODO Auto-generated method stub
		int len = 0;
		
		try {
			len = dis.available();
			
			if(len <= 0){
				return;
			}
			
			int cmdType = dis.readInt();
			int playerId = dis.readInt();
			len = dis.readInt();
			byte[] data = new byte[len];
			dis.read(data);			
			String str = new String(data);
			
			//构建消息对象，放入队列
			Message msg = new Message(cmdType, str);
			if(playerId != 0){
				msg.setPlayerId(playerId);
			}
			else{
				//如果playerId==0, 则表示属于未注册的新客户端，设置为1
				msg.setPlayerId(1);
			}
			
			list.add(msg);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			close();
			System.out.println("网络连接错误");
//			e.printStackTrace();
		}
	}

	
	/**
	 * 负责根据消息的内容，大包成需要的格式，一次写入输出流
	 * 
	 * @param msg
	 * @param player
	 */
	private void packMessage(Message msg, Player player) {
		// TODO 将消息打包成msg进行发送

		try {
			player.getOutputStream().writeInt(msg.getCmdType());
			System.out.println("Server: send cmdType: " + msg.getCmdType());
			player.getOutputStream().writeInt(msg.getPlayerId());
			System.out.println("Server: send playerId: " + msg.getPlayerId());
			player.getOutputStream().writeInt(
					msg.getMessage().getBytes().length);
			player.getOutputStream().write(msg.getMessage().getBytes());
			System.out.println("Server: send cmdType: " + msg.getMessage());
			System.out.println("send data ok");

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	

	/**
	 * 发送数据到客户端 获取player中包含的输出流通道
	 */
	private void sendData() {
		// TODO Auto-generated method stub
		if (Server.playerMap.isEmpty()) {
			return;
		}

		Iterator it = Server.playerMap.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry<Integer, Player> entry = (Entry<Integer, Player>) it
					.next();
			Player player = entry.getValue();

			if (player == null) {
				return;
			}

			/**
			 * 如果数据不为空,则发送队列中的数据到客户端
			 */
			if (!player.data.isEmpty()) {
				Message msg = (Message) player.data.pop();
				packMessage(msg, player);

			}
		}
	}
	
	/**
	 * 关闭连接
	 */
	private void close() {
		try {
			dis.close();
			dos.close();
			socket.close();
		} catch (Exception e) {
		}
	}
}

逻辑处理类LogicHandler.java

该类的主要功能
   1. 去除消息队列的消息对象
   2. 分析消息的cmdType
   3. 然后分发给相应的消息处理方法进行处理
      基本流程包括：
      玩家注册：就是将玩家对象放入playerMap的哈希表待用
      玩家坐下：根据发送过来的消息，更新桌子列表情况，然后返回消息
      玩家请求开始：设置玩家的状态为开始，检查该游戏桌子的状态是否满足条件
                    满足的话，就开始游戏，并且调用相关的裁判类进行逻辑判断处理
      玩家的棋子移动：根据具体的棋子坐标，更新裁判类的棋牌位置
      其他还包括玩家退出、离开游戏等，目前还未完成。

详细查看代码：

/**
 * 
 */
package net.tuolian.newserver;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * @author sean
 * 
 *
 */
public class LogicHandler {	
	private List list = null;

	private Network network;
	

	public LogicHandler(Network network){
		this.network = network;
		
		list = network.list;
	}
	
	/**
	 * 
	 */
	public void logicProcess(){
		if( list.size() <= 0){
			return;
		}
		Message msg = (Message) list.remove(0);
		if( msg == null){
			return;
		}
		
		int cmdType = msg.getCmdType();
		
		switch (cmdType) {
		case Message.REGISTER_REQ:
			handleRegister(msg);
			break;

		case Message.TAKE_REQ:
			handleTake(msg);
			break;

		case Message.START_REQ:
			handleStart(msg);
			break;

		case Message.MOVE_REQ:
			handleMove(msg);
			break;

		case Message.EXIT_REQ:
			handleExit(msg);
			break;

		case Message.EXITGAME_REQ:
			handleExitGame(msg);
			break;

		default:

			break;
		}
		
	}
	
	/**
	 * 初次登陆用户的注册逻辑
	 * 将好友放入playerMap保存
	 * 设置playerId
	 * 
	 */
	private void handleRegister(Message msg) {
		Server.counter++;
		System.out.println("counter: " + Server.counter);

		Player player = null;
		player = new Player();
		player.setID(Server.counter);	

		player.setOutputStream(network.dos);
		
		if(player != null){
			Server.playerMap.put(new Integer(Server.counter), player);
			
			//发送桌子信息到客户端
			sendDesksInfo(player);
		}
	}
	
	/**
	 * 处理客户端坐下的动作
	 */
	private void handleTake(Message msg) {
			String message = null;
			Player player = null;

			int playerId = msg.getPlayerId();

			System.out.println("handleTake playerid " + playerId);
			player = Server.playerMap.get(playerId);
			message = msg.getMessage();
			System.out.println("Server recieve take msg: " + message);

		try {
			int index1 = message.indexOf(",");
			int index2 = message.indexOf(",", index1 + 1);
			int dindex = Integer
					.parseInt(message.substring(index1 + 1, index2));
			int pindex = Integer.parseInt(message.substring(index2 + 1));
		
			if (dindex < Server.DESKNUM && dindex >= 0) {
				if (Server.desks[dindex].isEmpty(pindex)) {
					Server.desks[dindex].setPlayer(pindex, player);
					player.setDesk(Server.desks[dindex]);

					sendMessage(Message.UPDATEDESK_RESP, player, "takeseat");
					updateClientsDesk(dindex);
				}
			}
		} catch (Exception exc) {
		}
	}

	/**
	 * 遍历所有玩家，更新桌子的玩家情况
	 * 
	 * @param dindex
	 */
	private void updateClientsDesk(int dindex) {
		// TODO Auto-generated method stub
		Iterator it = Server.playerMap.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry<Integer, Player> entry = (Entry<Integer, Player>) it
					.next();
			Player player = (Player) entry.getValue();
			updateDesks(player, dindex);
		}
	}

	/**
	 * 更新具体桌号的玩家情况
	 * 
	 * @param player
	 * @param dindex
	 */
	private void updateDesks(Player player, int dindex) {
		// TODO Auto-generated method stub
		String message = "updatedesk," + dindex;
		String str = "";

		for (int i = 0; i < Server.desks[dindex].getPlayersCounter(); i++) {
			if (i == 0) {
				if (Server.desks[dindex].isEmpty(i)) {
					str = "0";
				} else {
					str = "1";
				}
			} else {
				if (Server.desks[dindex].isEmpty(i)) {
					str = "0";
				} else {
					str = "1";
				}
			}
			message = message + str;
		}
		sendMessage(Message.UPDATEDESK_RESP, player, message);
		System.out.println("Server send updateDesk message");
	}
	
	/**
	 * 处理开始游戏的状态
	 */
	private void handleStart(Message msg) {
		// TODO Auto-generated method stub
		int playerId = msg.getPlayerId();
		Player player = Server.playerMap.get(playerId);

		// 开始处理游戏开始的逻辑
		player.start();
		Desk desk1 = player.getDesk();

		if (desk1.isReady()) {
			desk1.start();
		}
		System.out.println("Server: handle start process ok");
	}
	
	/**
	 * 处理游戏中移动的业务逻辑
	 */
	private void handleMove(Message msg) {
		Player player = null;

		int playerId = msg.getPlayerId();
		String message1 = msg.getMessage();
		System.out.println("server recieved move msg: "
				+ message1);

		player = Server.playerMap.get(playerId);
		Desk desk = player.getDesk();
		desk.moveChess(message1);
	}
	
	/**
	 * 退出当前游戏，回到游戏大厅
	 * @param msg
	 */
	private void handleExit(net.tuolian.newserver.Message msg) {
		// TODO Auto-generated method stub
		
		
	}

	/**
	 * 玩家退出当前游戏的逻辑处理
	 */
	private void handleExitGame(Message msg) {
		// TODO 玩家退出当前游戏的逻辑处理, 得到玩家的桌子，玩家初始化，桌子去掉玩家、玩家列表去掉玩家,更新桌子
			int playerId = msg.getPlayerId();
			Player player = Server.playerMap.get(playerId);
			Desk desk = player.getDesk();
			
			desk.removePlayer(player);		
			Server.playerMap.remove(player);
			player = null;
			updateClientsDesk(desk.getID());
	}

	/**
	 * 发送桌子的数据信息
	 * 
	 * @param player
	 */
	private void sendDesksInfo(Player player) {
		// TODO Auto-generated method stub
		int cmdType = Message.DESKS_RESP;

		String message = "desks," + Server.DESKNUM;
		for (int i = 0; i < Server.DESKNUM; i++) {
			String str = "";
			for (int j = 0; j < Server.desks[i].getPlayersCounter(); j++) {
				if (j == 0) {
					if (Server.desks[i].isEmpty(j))
						str = "0";
					else
						str = "1";
				} else {
					if (Server.desks[i].isEmpty(j))
						str = str + ",0";
					else
						str = str + ",1";
				}
			}
			message = message + ":" + str;
		}
		sendMessage(cmdType, player, message);
	}
	
	/**
	 * 发送消息
	 * 将速度打包成msg，放入队列中等待发送
	 * @param cmdType
	 * @param player
	 * @param message
	 */
	private void sendMessage(int cmdType, Player player, String message) {
		// TODO Auto-generated method stub
		Message msg = new Message(cmdType, message);
		msg.setPlayerId(player.getID());
		player.data.push(msg);
	}
}

注：很多代码参考了java项目全程实录