服务端代码

package com.peiyu.rpcs.bios;

import java.io.IOException;

public interface IRpcServers {

void start() throws IOException;

/\*\*  
 \* 服务注册  
 \* @param serviceInterface 服务接口  
 \* @param impl 服务实现类  
 \*/  
void register(Class serviceInterface, Class impl);  

}

实现类

package com.peiyu.rpcs.bios;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class RpcServesrImpl implements IRpcServers {
private int port;
public static final HashMap serviceRegistry = new HashMap();
private static final ThreadPoolExecutor executor = new ThreadPoolExecutor(20, 20, 100, TimeUnit.MILLISECONDS, new ArrayBlockingQueue(100));

public RpcServesrImpl(int port) {  
    this.port = port;  
}

/\*\*  
 \* 启动服务  
 \*/  
@Override  
public void start() throws IOException {  
    ServerSocket server = new ServerSocket();  
    server.bind(new InetSocketAddress(port));  
    System.out.println("Bio rpc 服务启动开始###端口###" + port);  
    try {  
        while (true) {  
            System.out.println("等待客户端接入");  
            executor.execute(new ServersTask(server.accept()));  
        }  
    } catch (Exception e) {  
        if (server != null) {  
            server.close();  
        }  
    }  
}

@Override  
public void register(Class serviceInterface, Class impl) {  
    serviceRegistry.put(serviceInterface.getName(), impl);  
}

static class ServersTask implements Runnable {  
    Socket client = null;

    public ServersTask(Socket socket) {  
        this.client = socket;  
    }

    ObjectInputStream input = null;//输入流  
    ObjectOutputStream output = null;//输出流

    @Override  
    public void run() {  
        //接收客户端发送来的字节流,并转化成对象,反射调用服务实现者,获取执行结果  
        try {  
            input = new ObjectInputStream(this.client.getInputStream());  
            String interfaceName = input.readUTF();  
            String methodName = input.readUTF();  
            Class<?>\[\] parameterType = (Class<?>\[\]) input.readObject();  
            Object\[\] args = (Object\[\]) input.readObject();  
            Class serverClass = serviceRegistry.get(interfaceName);//这里有问题服务器端去注册中心拉取实现类??  
                                                                //但是如果不考虑注册中心,当作本地映射还挺好,  
                                                                //省的使用反射来通过接口来找实现类.  
            if (serverClass == null) {  
                throw new ClassNotFoundException(interfaceName + " not found");  
            }  
            Method method = serverClass.getMethod(methodName, parameterType);  
            Object result = method.invoke(serverClass.newInstance(), args);  
            //执行结果反序列化返回给客户端  
            output = new ObjectOutputStream(this.client.getOutputStream());  
            output.writeObject(result);  
        } catch (Exception e) {  
            e.printStackTrace();  
        } finally {  
            if (output != null) {  
                try {  
                    output.close();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
            if (input != null) {  
                try {  
                    input.close();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
            if (this.client != null) {  
                try {  
                    this.client.close();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
        }

    }  
}  

}

mainapp

package com.peiyu.rpcs.bios;

import java.io.IOException;

public class MainApp {
public static void main(String[] args) throws Exception {
IRpcServers server = new RpcServesrImpl(8080);
server.register(IOrderService.class, IOrderServiceImpl.class);
server.start();
}

}

一个接口一个实现类

package com.peiyu.rpcs.bios;

public interface IOrderService {
String getOrderDtoByUserId(int i);

}

package com.peiyu.rpcs.bios;

public class IOrderServiceImpl implements IOrderService{

@Override  
public String getOrderDtoByUserId(int i) {  
    // TODO Auto-generated method stub

    return 100\*i+"";  
}

}

客户端

package com.peiyu.rpcs.bios;

public class CLIENT {
public static void main(String[] args) {
long start =System.currentTimeMillis();
for (int i=0;i<200;i++){
try {
IOrderService orderService= ProxyFactory.create(IOrderService.class,"127.0.0.1",8080);
System.out.println(orderService.getOrderDtoByUserId(i));
}catch (Exception e){
e.printStackTrace();
}
}
long end=System.currentTimeMillis();
System.out.println("总耗时："+(end-start));

}

}

代理

package com.peiyu.rpcs.bios;

import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.net.Socket;

public class ProxyFactory {

public static <T> T create(final Class<?> serviceInterface, final String ip, final int port) {  
    //将本地的接口调用转换成JDK的动态代理，在动态代理中实现接口的远程调用  
    return (T) Proxy.newProxyInstance(serviceInterface.getClassLoader(), new Class<?>\[\]{serviceInterface}, new ProxyHandler(ip, port, serviceInterface));  
}

static class ProxyHandler implements InvocationHandler {  
    private String ip;  
    private int port;  
    private Class<?> serviceInterface;

    public ProxyHandler(String ip, int port, Class<?> serviceInterface) {  
        this.ip = ip;  
        this.port = port;  
        this.serviceInterface = serviceInterface;  
    }

    @Override  
    public Object invoke(Object proxy, Method method, Object\[\] args) throws Throwable {  
        Socket socket = null;  
        ObjectOutputStream output = null;  
        ObjectInputStream input = null;  
        try {  
            // 创建Socket客户端，根据指定地址连接远程服务提供者  
            socket = new Socket(ip, port);  
            // 将远程服务调用所需的接口类、方法名、参数列表等编码后发送给服务提供者  
            output = new ObjectOutputStream(socket.getOutputStream());  
            output.writeUTF(serviceInterface.getName());  
            output.writeUTF(method.getName());  
            output.writeObject(method.getParameterTypes());  
            output.writeObject(args);  
            // 同步阻塞等待服务器返回应答，获取应答后返回  
            input = new ObjectInputStream(socket.getInputStream());  
            return input.readObject();  
        } finally {  
            if (socket != null) {  
                socket.close();  
            }  
            if (output != null) {  
                output.close();  
            }  
            if (input != null) {  
                input.close();  
            }  
        }  
    }  
}  

}

本地接口

package com.peiyu.rpcs.bios;

public interface IOrderService {
String getOrderDtoByUserId(int i);

}

总结与注意点:

1:output.writeUTF(serviceInterface.getName());这里面是 包名+接口名

2:这个是网上的代码,有些问题,注册中心serviceRegistry = new HashMap();写在了服务端,应该是客户端拉取才对,是不是客户端传output.writeUTF(com.peiyu.rpcs.bios.IOrderServiceImpl);才对呢?我想是,待考证(错误)

3.这个RPC如果不用serviceRegistry 映射,则需要通过接口找到实现类,这个就很麻烦

补充: 从注册中心拉取的是

//从ZK中获取地址 127.0.0.1:12345
String discover = serviceDiscovery.discover(rpcRequest.getClassName());

　客户端拉取的是ip地址+端口号,比如说俩个服务,zookeeper存储接口名和地址,

192.168.126.166:20880 和192.168.166.188:20880,　客户端选择一个ip地址就实现了负载均衡,这样客户端还还是向其中一个服务发送端口,服务的从Map<接口,实现类.Class>来get一个impl.整个思想就完成了

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　atzhang