Java RMI (Remote Method Invocation) (3)

Java RMI (Remote Method Invocation) (3)

// SampleI.java
import java.rmi.Remote;
import java.rmi.RemoteException;
 
public interface SampleI extends Remote {
     int     Add(int num1, int num2)  throws RemoteException;
     String  Echo(String Msg)  throws RemoteException;    
}

 

// Server.java
     
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
        
public class Server implements SampleI {
        
     public Server() {}
  
     public String Echo(String Msg) {
        return Msg;
     }
 
     public int Add(int num1, int num2) {
        int sum = num1 + num2;
        return sum;
     }
 
     public static void main(String args[]) {
        
         try {          
             
            // remote invocation export
             Server obj = new Server();
             SampleI stub = (SampleI) UnicastRemoteObject.exportObject(obj, 0);
 
             // RMI registry에 원격 객체(인터페이스가 상속)의 stub을 honbob와 bind 한다.
             Registry registry = LocateRegistry.getRegistry();
             registry.bind("honbob", stub);
            
             System.err.println("Server ready");
         } catch (Exception e) {
             System.err.println("Server exception: " + e.toString());
             e.printStackTrace();
         }
     }
}

// Client.java
 
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
 
public class Client {
     public static void main(String[] args) {
 
        String host = (args.length < 1) ? null : args[0];
        try {
            Registry registry = LocateRegistry.getRegistry(host);
            
            SampleI stub = (SampleI) registry.lookup("honbob");
            
            // server의 함수를 호출한다.
            String ResultEcho   = stub.Echo("Hi Hon Bob");
            int    ResultAdd    = stub.Add(125, 175);
            
            System.out.println("ResultEcho  : " + ResultEcho);
            System.out.println("ResultAdd   : " + ResultAdd);            
        } catch (Exception e) {
            System.err.println("Client exception: " + e.toString());
            e.printStackTrace();
        }
    }
}

 

 

 

출처 : 0yumin.tistory.com/17?category=606010