2016-7-30 网络通信原理

网络通信原理:

package com.example;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

// 回调接口
interface ICallback {
    String getString();
    void fun(String str);
}

// 登录
class A implements ICallback {
    String string = "login";

    public String getString() {
        return string;
    }
    @Override
    public void fun(String str) {
        System.out.println(string + " : " + str);
    }
}

// 回调的核心
class B {
    List<ICallback> iList = new ArrayList<>();

    // 注册被回调(注册函数)
    public void addTo(ICallback iCallback) {
        iList.add(iCallback);
    }

    // 回调函数
    public void excute() {
        int num = 0;
        for (ICallback i : iList) {
            i.fun(String.valueOf(num++));
        }
    }
}

// p2p聊天
class C implements ICallback {
    String string = "p2p";

    @Override
    public String getString() {
        return string;
    }
    @Override
    public void fun(String str) {
        System.out.println(string + " : " + str);
    }
}

// 群聊
class D implements ICallback {
    String string = "chatroom";

    @Override
    public String getString() {
        return string;
    }
    @Override
    public void fun(String str) {
        System.out.println(string + " : " + str);
    }
}

// 视频
class F implements ICallback {
    String string = "camera chat";

    @Override
    public String getString() {
        return string;
    }
    @Override
    public void fun(String str) {
        System.out.println(string + " : " + str);
    }
}

// QQ电话
class G implements ICallback {
    String string = "QQ phone";

    @Override
    public String getString() {
        return string;
    }
    @Override
    public void fun(String str) {
        System.out.println(string + " : " + str);
    }
}

class X extends Thread {
    boolean isRunning = true;
    int i = 1;
    public static int num = 0;
    List<ICallback> iList = new ArrayList<>();

    // 注册函数 : 注册被回调类方法
    public void addTo(ICallback iCallback) {
        iList.add(iCallback);
    }

    // 回调函数 : 处理回调
    public void run() {
        super.run();
        while (isRunning) {
            num++;
            try {
                System.out.println("=====" + new Date(System.currentTimeMillis()) + "=====");
                System.out.println("[num] = " + num + " | get a message!");
                System.out.println("---------");
                Thread.sleep(2000);

                // 处理所有回调
                for (ICallback i : iList) {
                    i.fun("<-[message]");
                }
                System.out.println("======================================");

                // 模拟现实,每隔一段时间就移除一个回调(监听)
                if (num == 2 * i) {
                    Thread.sleep(2000);
                    System.out.println("+++++++++++++");
                    System.out.println(iList.get(0).getString() +" completed !");
                    System.out.println("+++++++++++++");
                    removeFrom(0);
                    i++;
                    Thread.sleep(2000);
                }
                Thread.sleep(7000);
                if (iList.isEmpty()) {
                    System.out.println("**************************");
                    System.out.println("Do not have a active action");
                    isRunning = false;
                }

            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public void sstart() {
        start();
    }

    public void removeFrom(int i) {
        iList.remove(i);
    }
}

public class MyClass {
    public static void main(String[] args) {

        X x = new X();

        // 动态挂接被回调的类函数
        x.addTo(new A());
        x.addTo(new C());
        x.addTo(new D());
        x.addTo(new F());
        x.addTo(new G());

        x.sstart();
    }
}