// Implementation class for remote sorting (RMI). This includes the remote sort method
// and a main()...

import java.net.*;    // need this for MalformedURLException
import java.rmi.server.UnicastRemoteObject;
import java.rmi.*;
import java.util.*;

// The interface must extend the Remote interface to become something
// that RMI can serve up. 

public class RemoteSortImpl extends UnicastRemoteObject implements RemoteSort {

    // constructor just calls the UnicastRemoteObject constructor that
    // exports this object as a remote object

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

    // here is the actual sort - wow...
    public List sort(List l) throws RemoteException {
	Collections.sort(l);
	return(l);
    }

    public static void main(String args[]) {
	try {
	    RemoteSortImpl s = new RemoteSortImpl();

	    // register with the rmi registry
	    Naming.rebind("sort",s);
	    System.out.println("Sort is ready for trouble...");

	} catch (RemoteException e) {
	    System.out.println("RemoteException: " + e.getMessage());
	    e.printStackTrace();

	} catch (MalformedURLException m) {
	    System.out.println("URL Problem: " + m.getMessage());
	    m.printStackTrace();
	}

    }
}