标签：port 工程 accept oid client test ice ble string
本文利用java自带的socket编程实现了一个简单的rpc调用框架，由两个工程组成分别名为battercake-provider（服务提供者）、battercake-consumer（服务调用者）。
本部分的工程为battercake-provider，项目结构图如下图所示
先上rpc框架调用部分的代码，RpcProvider，该部分代码可以总结为两步
package com.rjzheng.rpc;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* RPC服务提供器
* @author zhengrongjun
*
*/
public class RpcProvider {
//存储注册的服务列表
private static List<Object> serviceList;
/**
* 发布rpc服务
* @param object
* @param port
* @throws Exception
*/
public static void export(int port,Object... services) throws Exception {
serviceList=Arrays.asList(services);
ServerSocket server = new ServerSocket(port);
Socket client = null;
while (true) {
//阻塞等待输入
client = server.accept();
//每一个请求，启动一个线程处理
new Thread(new ServerThread(client,serviceList)).start();
}
}
}接下来ServerThread线程处理类的代码，ServerThread主要做以下几个步骤
package com.rjzheng.rpc;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
import java.net.Socket;
import java.util.List;
public class ServerThread implements Runnable {
private Socket client = null;
private List<Object> serviceList = null;
public ServerThread(Socket client, List<Object> service) {
this.client = client;
this.serviceList = service;
}
@Override
public void run() {
ObjectInputStream input = null;
ObjectOutputStream output = null;
try {
input = new ObjectInputStream(client.getInputStream());
output = new ObjectOutputStream(client.getOutputStream());
// 读取客户端要访问那个service
Class serviceClass = (Class) input.readObject();
// 找到该服务类
Object obj = findService(serviceClass);
if (obj == null) {
output.writeObject(serviceClass.getName() + "服务未发现");
} else {
//利用反射调用该方法，返回结果
try {
String methodName = input.readUTF();
Class<?>[] parameterTypes = (Class<?>[]) input.readObject();
Object[] arguments = (Object[]) input.readObject();
Method method = obj.getClass().getMethod(methodName, parameterTypes);
Object result = method.invoke(obj, arguments);
output.writeObject(result);
} catch (Throwable t) {
output.writeObject(t);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
client.close();
input.close();
output.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private Object findService(Class serviceClass) {
// TODO Auto-generated method stub
for (Object obj : serviceList) {
boolean isFather = serviceClass.isAssignableFrom(obj.getClass());
if (isFather) {
return obj;
}
}
return null;
}
}接下来是使用的部分
先创建一个微服务，接口如下
package com.rjzheng.service;
public interface BatterCakeService {
/**
* 卖煎饼的服务
* @param name
* @return
*/
public String sellBatterCake(String name);
}实现类如下
package com.rjzheng.service.impl;
import com.rjzheng.service.BatterCakeService;
public class BatterCakeServiceImpl implements BatterCakeService {
@Override
public String sellBatterCake(String name) {
// TODO Auto-generated method stub
return name+"煎饼,卖的特别好";
}
}接下来就是发布服务
package com.rjzheng.start;
import com.rjzheng.rpc.RpcProvider;
import com.rjzheng.service.BatterCakeService;
import com.rjzheng.service.impl.BatterCakeServiceImpl;
public class RpcBootStrap {
public static void main(String[] args) throws Exception {
BatterCakeService batterCakeService =new BatterCakeServiceImpl();
//发布卖煎饼的服务，注册在20006端口
RpcProvider.export(20006,batterCakeService);
}
}本部分的工程为battercake-consumer，项目结构图如下图所示
先上rpc框架调用部分的代码RpcConsumer，步骤分两步
package com.rjzheng.rpc;
import java.lang.reflect.Proxy;
public class RpcConsumer {
public static <T> T getService(Class<T> clazz,String ip,int port) {
ProxyHandler proxyHandler =new ProxyHandler(ip,port);
return (T)Proxy.newProxyInstance(RpcConsumer.class.getClassLoader(), new Class<?>[] {clazz}, proxyHandler);
}
}接下来上代理类处理器的代码，代理类处理步骤分以下几步
package com.rjzheng.rpc;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.net.Socket;
import com.rjzheng.service.BatterCakeService;
public class ProxyHandler implements InvocationHandler {
private String ip;
private int port;
public ProxyHandler(String ip, int port) {
// TODO Auto-generated constructor stub
this.ip = ip;
this.port = port;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
// TODO Auto-generated method stub
Socket socket = new Socket(this.ip, this.port);
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
output.writeObject(BatterCakeService.class);
output.writeUTF(method.getName());
output.writeObject(method.getParameterTypes());
output.writeObject(args);
output.flush();
Object result = input.readObject();
if(result instanceof Throwable) {
throw (Throwable) result;
}
return result;
} finally {
socket.shutdownOutput();
}
}
}接下来建立一个测试类RpcTest如下（跑该测试类前，记得运行在battercake-provider端的RpcBootstrap类发布BatterCakeService服务）
package com.rjzheng.start;
import com.rjzheng.rpc.RpcConsumer;
import com.rjzheng.service.BatterCakeService;
public class RpcTest {
public static void main(String[] args) {
BatterCakeService batterCakeService=RpcConsumer.getService(BatterCakeService.class, "127.0.0.1", 20006);
String result=batterCakeService.sellBatterCake("双蛋");
System.out.println(result);
}
}输出结果如下
双蛋煎饼,卖的特别好至此，我们就实现了一个简易的rpc服务调用框架
标签：port 工程 accept oid client test ice ble string
原文地址：https://www.cnblogs.com/rjzheng/p/8798556.html
