RPC的实现与远程调用的实现机制

Posted 2022-11-28 Frank Q

本文主要是RPC的实现代码总结：
1、RPC的Server端实现
2、RPC的Client端实现
3、RPC原理分析

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注意：核心jar包使用的是Hadoop中的RPCjar包；

1、RPC的Server实现

1）创建RPCServer工程：

LoginServiceInterface.java

package cn.rpc.demo;

public interface LoginServiceInterface 
    public static final long versionID=1L;
    public String login(String username,String password);

LoginServiceImpl.java

package cn.rpc.demo;

public class LoginServiceImpl implements LoginServiceInterface 

    @Override
    public String login(String username, String password) 

        return username + " logged in successfully!";
    

Starter.java

package cn.rpc.demo;

import java.io.IOException;

import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.RPC.Builder;
import org.apache.hadoop.ipc.RPC.Server;

public class Starter 

    public static void main(String[] args) throws HadoopIllegalArgumentException, IOException 

        Builder builder = new RPC.Builder(new Configuration());

        builder.setBindAddress("127.0.0.1").setPort(10000).setProtocol(LoginServiceInterface.class).
            setInstance(new LoginServiceImpl());

        Server server = builder.build();

        server.start();

    

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2、RPC的Client端实现

LoginServiceInterface.java

package cn.rpc.demo;

public interface LoginServiceInterface 

    public static final long versionID=1L;
    public String login(String username,String password);

LoginController.java

package cn.rpc.demo;

import java.net.InetSocketAddress;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.RPC;

public class LoginController 

    public static void main(String[] args) throws Exception 
        LoginServiceInterface proxy = RPC.getProxy(LoginServiceInterface.class, 1L, new InetSocketAddress("localhost", 10000), 
                new Configuration());

        String result = proxy.login("123", "123456");

        System.out.println(result);
    

运行结果：

3、RPC原理分析

RPC:远程过程调用机制：主要适用于分布式系统

下图主要是远程调用的底层机制：