Java RMI

ServerEntryPoint.java

package org.ivan.rmi;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.rmi.AlreadyBoundException;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

/**
 * User: ivan
 * Date: 27.09.13
 * Time: 17:19
 */
public class ServerEntryPoint {

    public static void main(String[] args) {
        try {
            SimpleServer remoteObject = new SimpleServer();
            Registry registry = LocateRegistry.createRegistry(1099);
            Remote skeleton = UnicastRemoteObject.exportObject(remoteObject, 0);
            registry.bind(SimpleRemote.REMOTE_NAME, skeleton);
            System.out.println("[INFO]: Service started");
            listenConsole();
        } catch (RemoteException e) {
            e.printStackTrace();
        } catch (AlreadyBoundException e) {
            e.printStackTrace();
        }
    }

    public static void listenConsole() {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        try {
            String line;
            while((line = br.readLine()) != null) {
                if(line.toLowerCase().contains("exit")) {
                    System.out.println("Bye!");
                    System.exit(0);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

SimpleClient.java

package org.ivan.rmi;

import java.rmi.NotBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.util.Random;

/**
 * User: ivan
 * Date: 27.09.13
 * Time: 13:14
 */
public class SimpleClient {
    public static void main(String[] args) {
        Random rand = new Random();
        try {
            SimpleRemote proxy = (SimpleRemote) LocateRegistry.getRegistry(1099).lookup(SimpleRemote.REMOTE_NAME);
            for(int i = 0; i < 5; i++) {
                int a = rand.nextInt(100);
                int b = rand.nextInt(100);
                System.out.format("%d + %d = %d\n", a, b, proxy.sum(a, b));
            }
        } catch (RemoteException e) {
            e.printStackTrace();
        } catch (NotBoundException e) {
            e.printStackTrace();
        }
    }
}

SimpleRemote.java

package org.ivan.rmi;

import java.rmi.Remote;
import java.rmi.RemoteException;

/**
 * User: ivan
 * Date: 27.09.13
 * Time: 13:03
 */
public interface SimpleRemote extends Remote {
    String REMOTE_NAME = "SUMMATOR";
    int sum(int i, int j) throws RemoteException;
}

SimpleServer.java

package org.ivan.rmi;

/**
 * User: ivan
 * Date: 27.09.13
 * Time: 13:06
 */
public class SimpleServer implements SimpleRemote {
    @Override
    public int sum(int i, int j) {
        return i + j;
    }
}