JAVA原生RMI

JAVA原生RMI

步骤:

• 接口要继承java.rmi.Remote
• 方法要主动抛出RemoteException异常
• 实现类要继承 java.rmi.server.UnicastRemoteObject
• 防火墙设置 继承java.rmi.server.RMISocketFactory

接口

package com.ghgcn.rpc01.service;

import java.rmi.Remote;
import java.rmi.RemoteException;
/**
 * 
* @ClassName: HelloService
* @Description: 1.接口要继承java.rmi.Remote
* @author 刘楠
* @date 2018年7月9日 下午7:18:09
*
 */
public interface HelloService extends Remote{

    /**
     * 
    * @Title: sayHello
    * @Description: 2.方法要主动抛出RemoteException异常
    * @param @param someOne
    * @param @return
    * @param @throws RemoteException    设定文件
    * @return String    返回类型
    * @throws
     */
    public String sayHello(String someOne) throws RemoteException;
}

实现

package com.ghgcn.rpc01.service.imp;

import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;

import com.ghgcn.rpc01.service.HelloService;

/**
 * 
* @ClassName: HelloServiceImp
* @Description: 3.实现类要继承 java.rmi.server.UnicastRemoteObject
* @author 刘楠
* @date 2018年7月9日 下午7:19:34
*
 */
public class HelloServiceImp extends UnicastRemoteObject implements HelloService {

    /**
    * @Fields serialVersionUID : TODO(用一句话描述这个变量表示什么)
    */
    private static final long serialVersionUID = 4526949627605368404L;

    public HelloServiceImp() throws RemoteException {
        super();
    }

    public String sayHello(String someOne) throws RemoteException {
        return "Hello "+someOne ;
    }

}

注册服务与启动

public class ServerRun {

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

        //创建服务
        HelloService helloService = new HelloServiceImp();
        //注册服务
        LocateRegistry.createRegistry(8801);
     
        //绑定服务
        Naming.bind("rmi://localhost:8801/helloService", helloService);
        
        System.out.println("Servermain provide RPC Run now ");
        
    }

}

主服务启动

• 创建服务
• 注册服务
• 添加防止防火墙拦截
• 绑定服务

客户端调用

public class ClientMain {

    public static void main(String[] args) throws MalformedURLException, RemoteException, NotBoundException {

        //服务引入
        HelloService helloService = (HelloService) Naming.lookup("rmi://localhost:8801/helloService");
        
        //调用
        
        System.out.println("RMI服务调用："+helloService.sayHello("张三"));
    }

}

添加防止防火墙拦截

public class CustomerSocketFactory extends RMISocketFactory {

    /**
     * 指定通信端口，防止防火墙拦截
     */
    @Override
    public Socket createSocket(String host, int port) throws IOException {
        return new Socket(host, port);
    }

    @Override
    public ServerSocket createServerSocket(int port) throws IOException {
        if(port==0) {
            port=8501;
        }
        System.out.println("RMI NOTIFY PORT :"+port);
        
        return new ServerSocket(port);
    }

}

主服务

public class ServerRun {

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

        //创建服务
        HelloService helloService = new HelloServiceImp();
        //注册服务
        LocateRegistry.createRegistry(8801);
        //防止防火墙拦截
        RMISocketFactory.setSocketFactory(new CustomerSocketFactory());
        //绑定服务
        Naming.bind("rmi://localhost:8801/helloService", helloService);
        
        System.out.println("Servermain provide RPC Run now ");
        
    }

}