dubbo SPI | 易学教程

RMI

rmi clinet:

public class RmiClient {
    public static void main(String[] args) throws RemoteException, NotBoundException, MalformedURLException {
        String remoteAddr = "rmi://localhost:8080/UserService";
        UserService userService = (UserService) Naming.lookup(remoteAddr);
        System.out.println(String.format("引用远程服务成功，当前主机:%s ", ManagementFactory.getRuntimeMXBean().getName()));
        String response = userService.getName(11);
        System.out.println("=======> " + response + " <=======");

    }
}

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public class RmiRegister {
    public static void main(String[] args) throws IOException {
        // 本地主机上的远程对象注册表Registry的实例
        LocateRegistry.createRegistry(8080);
        System.out.println("======= 注册中心启动成功! =======");
        System.in.read(new byte[1024]);
    }

}

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public class RmiServer {
    public static void main(String[] args) throws IOException, AlreadyBoundException {
        // 创建一个远程对象
        UserService hello = new UserServiceImpl();
        //绑定的URL标准格式为：rmi://host:port/name
        Naming.bind("rmi://localhost:8080/UserService3", hello);
        System.out.println("======= 启动RMI服务注册成功! =======");
        System.in.read(new byte[1024]);
    }
}

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public interface UserService extends Remote {

    String getName(Integer id) throws RemoteException;
}

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public class UserServiceImpl extends UnicastRemoteObject implements UserService {

    protected UserServiceImpl() throws RemoteException {
    }


    @Override
    public String getName(Integer id) {
        return String.format("myName is luban :%s", ManagementFactory.getRuntimeMXBean().getName());
    }
}

spi 思想:

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public class Main {
    public static void main(String[] args) {
        Iterator<UserService> iterator = ServiceLoader.load(UserService.class).iterator();
        UserService service = iterator.next();
        System.out.println(service.getName(11));
//        Class.forName("com.mysql.jdbc.Driver");
//        DriverManager.getConnection("");
    }
}

public interface UserService {
    public String getName(int id);
}

/**
 * @author Tommy
 * Created by Tommy on 2019/12/1
 **/
public class UserServiceImpl implements UserService {
    @Override
    public String getName(int id) {
        return "luban good ";
    }
}

来源：CSDN

作者：thoughtCodes

链接：https://blog.csdn.net/xiamaocheng/article/details/104182529

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