// A server object that implements the NextNumber
// remote interface

import java.rmi.RemoteException;
import java.rmi.RMISecurityManager;
import java.rmi.Naming;
import java.rmi.server.UnicastRemoteObject;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.net.MalformedURLException;

public class NextNumberServer extends UnicastRemoteObject
	                              implements NextNumber {
    public NextNumberServer() throws RemoteException {
	try {
          String host = InetAddress.getLocalHost().getHostName();
          String url = "rmi://" + host + "/nextNumber";
	    Naming.rebind(url, this);
	    System.out.println("\n Server bound to: " + url);
        } catch (UnknownHostException ex) {
	    System.err.println("\n Couldn't get local host name");
	    System.exit(1);
	} catch (RemoteException ex) {
	    System.err.println("\n Couldn't contact rmiregistry.");
	    System.err.println(" Are you sure you're running rmiregistry?");
	    System.exit(1);
	} catch (MalformedURLException ex) {
	    // Shouldn't happen
	    System.exit(1);
	}
    }

    public int getNextNumber(int n) {
	return n+1;
    }

    public static void main(String[] args) {
	try {
        NextNumberServer server = new NextNumberServer();
	} catch (RemoteException ex) {
	  System.err.println("\n Trouble creating server: " +
	                     ex.getMessage());
        ex.printStackTrace();
	}
    }
}