import java.rmi.*;

public interface KMeans extends Remote {

	VectorSerializable[] getClusters() throws RemoteException;

}

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import java.io.Serializable;
import java.rmi.*;
import java.rmi.server.*;
import java.sql.*;

import dbkmeans.*;

public class KMeansImpl extends UnicastRemoteObject implements KMeans, Serializable {

	private static final long serialVersionUID = 1L;
	private String nome;

	public KMeansImpl(String n) throws RemoteException {
		nome = n;
	}

	public VectorSerializable[] getClusters() throws RemoteException {
		VectorSerializable dataPoints = new VectorSerializable();
		Connection con = null;
		Statement stmt = null;
		ResultSet rs = null;
		VectorSerializable[] v = null;

		try{
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			con = DriverManager.getConnection("jdbc:mysql://localhost/SEI?user=root&password=d4t4b4s3");
			System.out.println("Connessione al DB SEI Riuscita");
			stmt = con.createStatement();
			rs = stmt.executeQuery("select * from giocatori");

			while (rs.next()) {
				String nome = rs.getString("Nome_giocatore");
				int prezzo = rs.getInt("Prezzo");
				dataPoints.add(new DataPoint(0, prezzo, nome));
			}

			System.out.println("Sono arrivato fin qui.");
			JCA jca = new JCA(3, 1000, dataPoints);
			jca.startAnalysis();

			v = jca.getClusterOutput();
			System.out.println("Ora fin arrivato fin qui.");
			System.out.println("Taglia: "+v.length);
		}
		catch(Exception e){
			System.out.println("Connessione al DB SEI Rifiutata");
			System.exit(0);
		}
		return v;
	}

	public static void main(String[] args) {
		try {
			KMeansImpl km1 = new KMeansImpl("KMeans1");
			Naming.rebind("KMeans1", km1);
			System.out.println("Attesa Client...");
		}
		catch(Exception e) { e.printStackTrace(); }
	}

}

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import java.rmi.*;
import java.util.Iterator;
import dbkmeans.DataPoint;

public class Client {

	public static void main(String[] args) {

		try {
			System.out.println("Provo la connessione\n");
			KMeans km1 = (KMeans) Naming.lookup("rmi://localhost/KMeans1");
			System.out.println("Chiedo il vector\n");
			VectorSerializable[] v = km1.getClusters();
			System.out.println("Ho ricevuto il vector\n");
			for (int i = 0; i < v.length; i++) {
				VectorSerializable tempV = v[i];
				System.out.println("-----------Cluster" + i + "-----------");
				Iterator iter = tempV.iterator();
				while (iter.hasNext()) {
					DataPoint dpTemp = (DataPoint) iter.next();
					System.out.println(dpTemp.getObjName() + "[" + dpTemp.getX() + "," + dpTemp.getY() + "]");
				}
			}
		} catch(Exception e) { e.printStackTrace(); }
	}
}

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import java.io.Serializable;
import java.util.Vector;

public class VectorSerializable extends Vector implements Serializable {

}