RPC框架几行代码就够了

转于作者梁飞在公司的Blog：
http://pt.alibaba-inc.com/wp/experience_1330/simple-rpc-framework.html

因为要给百技上实训课，让新同学们自行实现一个简易RPC框架，在准备PPT时，就想写个示例，发现原来一个RPC框架只要一个类，10来分钟就可以写完了，虽然简陋，也晒晒：

Java代码

/*
* Copyright 2011 Alibaba.com All right reserved. This software is the
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.study.rpc.framework;
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.ServerSocket;
import java.net.Socket;
/**
* RpcFramework
*
* @author william.liangf
*/
public class RpcFramework {
/**
* 暴露服务
*
* @param service 服务实现
* @param port 服务端口
* @throws Exception
*/
public static void export(final Object service, int port) throws Exception {
if (service == null)
throw new IllegalArgumentException("service instance == null");
if (port <= 0 || port > 65535)
throw new IllegalArgumentException("Invalid port " + port);
System.out.println("Export service " + service.getClass().getName() + " on port " + port);
ServerSocket server = new ServerSocket(port);
for(;;) {
try {
final Socket socket = server.accept();
new Thread(new Runnable() {
@Override
public void run() {
try {
try {
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
String methodName = input.readUTF();
Class<?>[] parameterTypes = (Class<?>[])input.readObject();
Object[] arguments = (Object[])input.readObject();
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
try {
Method method = service.getClass().getMethod(methodName, parameterTypes);
Object result = method.invoke(service, arguments);
output.writeObject(result);
} catch (Throwable t) {
output.writeObject(t);
} finally {
output.close();
}
} finally {
input.close();
}
} finally {
socket.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 引用服务
*
* @param <T> 接口泛型
* @param interfaceClass 接口类型
* @param host 服务器主机名
* @param port 服务器端口
* @return 远程服务
* @throws Exception
*/
@SuppressWarnings("unchecked")
public static <T> T refer(final Class<T> interfaceClass, final String host, final int port) throws Exception {
if (interfaceClass == null)
throw new IllegalArgumentException("Interface class == null");
if (! interfaceClass.isInterface())
throw new IllegalArgumentException("The " + interfaceClass.getName() + " must be interface class!");
if (host == null || host.length() == 0)
throw new IllegalArgumentException("Host == null!");
if (port <= 0 || port > 65535)
throw new IllegalArgumentException("Invalid port " + port);
System.out.println("Get remote service " + interfaceClass.getName() + " from server " + host + ":" + port);
return (T) Proxy.newProxyInstance(interfaceClass.getClassLoader(), new Class<?>[] {interfaceClass}, new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] arguments) throws Throwable {
Socket socket = new Socket(host, port);
try {
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
try {
output.writeUTF(method.getName());
output.writeObject(method.getParameterTypes());
output.writeObject(arguments);
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
Object result = input.readObject();
if (result instanceof Throwable) {
throw (Throwable) result;
}
return result;
} finally {
input.close();
}
} finally {
output.close();
}
} finally {
socket.close();
}
}
});
}
}

用起来也像模像样：

(1) 定义服务接口

Java代码

/*
* Copyright 2011 Alibaba.com All right reserved. This software is the
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
/**
* HelloService
*
* @author william.liangf
*/
public interface HelloService {
String hello(String name);
}

(2) 实现服务

Java代码

/*
* Copyright 2011 Alibaba.com All right reserved. This software is the
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
/**
* HelloServiceImpl
*
* @author william.liangf
*/
public class HelloServiceImpl implements HelloService {
public String hello(String name) {
return "Hello " + name;
}
}

(3) 暴露服务

Java代码

/*
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
import com.alibaba.study.rpc.framework.RpcFramework;
/**
* RpcProvider
*
* @author william.liangf
*/
public class RpcProvider {
public static void main(String[] args) throws Exception {
HelloService service = new HelloServiceImpl();
RpcFramework.export(service, 1234);
}
}

(4) 引用服务

Java代码

/*
* confidential and proprietary information of Alibaba.com ("Confidential
* Information"). You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license agreement you entered
* into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
import com.alibaba.study.rpc.framework.RpcFramework;
/**
* RpcConsumer
*
* @author william.liangf
*/
public class RpcConsumer {
public static void main(String[] args) throws Exception {
HelloService service = RpcFramework.refer(HelloService.class, "127.0.0.1", 1234);
for (int i = 0; i < Integer.MAX_VALUE; i ++) {
String hello = service.hello("World" + i);
System.out.println(hello);
Thread.sleep(1000);
}
}
}

from: http://javatar.iteye.com/blog/1123915

RPC框架几行代码就够了相关推荐

读梁飞-RPC框架几行代码就够了有感
梁飞-dubbo框架的设计者,是一位阿里的资深架构师 RPC框架几行代码就够了,这篇文章十分适合不是很了解RPC的人看一遍,最好是自己敲一遍.注释,对入参的处理,对流用后进行关闭,动态代理的使用. 这 ...
还发愁项目经验吗？基于Netty实现分布式RPC框架[附完整代码]
写给大家的话最近我收到很多读者的来信,对如何学习分布式.如何进行项目实践和提高编程能力,存在很多疑问. 分布式那么难,怎么学?为什么看了那么多书还是掌握不了? 开源的框架比如Dubbo代码太多了,完 ...
awvs 13使用_如何解密AWVS？15行代码就够了！
项目介绍 AWVS一直以来在圈子中都比较火,以速度快和高准确性深受大家喜爱.很多人想研究其运作机制却因闭源而不得其解. 今天这里通过一个极其简单的方式,只用几行代码就能让你一见其核心代码.这是最新解码 ...
5行代码秀碾压，比Keras还好用的fastai来了，尝鲜PyTorch 1.0必备伴侣
休假栗问耕假装发自凹非寺量子位出品 | 公众号 QbitAI PyTorch 1.0来了~ 在今天的F8(Facebook开发者大会)上,深度学习框架PyTorch 1.0 rc1版如期发布 ...
100 行代码透彻解析 RPC 原理
欢迎关注方志朋的博客,回复"666"获面试宝典文章来源:https://sourl.cn/HpZHvy 引言本文主要论述的是"RPC 实现原理",那么首先 ...
4行代码，让app自动化框架支持 webview 混合应用操作
移动端 app 自动化框架很多,但是有一些框架因为不支持混合应用测试,一直没有完全流行.比较典型的是经典的 Python 框架 uiautomator2, 这个框架简单好用,没有 appium 那样复 ...
都说Djnago框架重，那就让哥用15行代码写个django web程序！
很多初学django的小伙伴都会了解到,django是个大而全的网络框架,本身集成了ORM.模型绑定.模板引擎.缓存.Session等诸多功能.要学这么多内容,要学到猴年马月啊!? 不过世界真是奇妙, ...
蒋金楠：200行代码7个对象《ASP.NET Core框架揭密》苏州.NET俱乐部课程分享
[课程名称] <ASP.NET Core框架揭密> [老师介绍] 蒋金楠,同程艺龙机票事业部技术专家,微软最有价值专家(MVP,连续12),多本.NET专著作者.博客园Artech,公众号 ...
JAVA5000行代码什么概念_GitHub - catstiger/mvc: 一个不超过5000行代码的，快速，简单，易用的MVC框架。...
一个不超过5000行代码的,快速,简单,易用的MVC框架. 我们的目的是: 让MVC回归其最初的目的. 因简单而快速,超过目前各种主流MVC. 零侵入,零配置,易于测试,并且让开发者感觉不到MVC的存 ...

RPC框架几行代码就够了

RPC框架几行代码就够了相关推荐

最新文章

热门文章