一台服务器多个客户端 [英] one server multiple clients

问题描述

我遇到以下问题:

1. 我需要编写一个服务器程序，将接受多个客户端
2. 所有客户都从服务器订阅相同的数据，例如股价更新.
3. 每个客户端都可以向服务器发送简单的命令，例如登录"，停止"

这是我的解决方案，由于我对多线程/tcp的经验不是很丰富，所以我想知道这是一个好的解决方案吗?如果没有，是否有更好的解决方案?每个客户端套接字是否都必须有一个线程?谢谢 顺便说一句:对每个人都感到困惑，这是一个很小的项目，只涉及5-10个班级.

So here is my solution, Since I am not very experianced in multithread/tcp, I want to know is it a good solution? if not, is there any better solution? is it necessary to have a thread for each client socket? Thanks BTW: sorry for confusing every one, it is a small project that only involve 5-10 classes.

class AcceptThread {
    ......
    public void run () {
        ControlThread controlThread = new ControlThread();
        controlThread.start();

        Socket socket = new Socket(port);
        while (!stop) {
            Socket s = socket.accept();
            controlThread.addClient (s);
        }
    }
}

class ControlThread {
    Set<Scoket> clients;
    SendDataThread sendDataThread;  

    public ControlThread () {
        sendDataThread = new SendDataThread();
        sendDataThread.start();     
    }

    public void addClient (Socket socket) {
        clients.add(socket);
        sendDataThread.addListener(socket);
    }

    public void run () {
        ......
        for (Socket s : clients) {
            if (s.getInputStream().available()) {
                //read command from s
            }
        }
        ......              
    }
}

class SendDataThread () {
    Set<Scoket> listeners;

    public void addListener (Socket s) {
        listeners.add(s);
    }

    public void run () {
        for (Socket s: listeners) {
            // send data to each listener
        }
    }
}

推荐答案

每个客户端套接字是否需要一个线程?

不，事实上，我什至不推荐它.如果这是一个小项目，并且您不想使用任何现有的库，建议您使用

No, as a matter of fact, I wouldn't even not recommend it. If it's a small project and you don't want to use any existing library, I would suggest you use the java.nio package and the SelectableChannels. With a so called selector you can easily monitor clients for incoming data in a non-blocking way.

以下是一些有用的链接:

Here are a few useful links:

• NIO示例(来自官方教程)
• The Rox Java NIO教程

• NIO Examples (from the official tutorial)
• The Rox Java NIO Tutorial

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