import heartMonitor.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import org.omg.PortableServer.*;
import org.omg.CosNaming.NamingContextPackage.*;

import java.util.*;
import javax.swing.*;

// This class implements a very simple CORBA based Heart rate monitor for
// a nurse's station.  It can work with a number of local monitors in
// individual patient's rooms.
//
// This Server requires that a CORBA Name Service be running.
//
// Written by: Stuart Hansen
// Date: February 3, 2009
public class NursesStation extends HeartRateMonitorPOA{

    private ORB orb;  // the orb for this server
    private POA rootpoa; // the root POA for this server

    // A hashtable to store all the values received.
    private Hashtable<String, ArrayList<Integer>>  patients;

    // The constructor sets up the ORB for communication
    public NursesStation (String [] args)
    {
        patients = new Hashtable<String, ArrayList<Integer>>();
        setUpServerORB(args);
    }

    // Register a new patient with the monitor
    public void register (String name) 
    {    
        patients.put(name, new ArrayList<Integer>());
    }

    // Unregister a patient
    public void unregister (String name)
    {
        patients.remove(name);
    }
  
    // Add a value for a particular patient
    public void newRate (String name, int value)
    {
        patients.get(name).add(value);
    }

    // Sound an alarm for a patient
    public void soundAlarm (String name, int value)
    {
        JOptionPane.showMessageDialog(null, name + " has a heart rate of " + value);
    }
      
    // This method setups the Server ORB
    public void setUpServerORB(String [] args)
    {
        try{
            // create and initialize the ORB
            orb = ORB.init(args, null);

            // get reference to rootpoa & activate the POAManager
            rootpoa = POAHelper.narrow(
                orb.resolve_initial_references("RootPOA"));
            rootpoa.the_POAManager().activate();

            // Convert our server to a CORBA object and IOR
            org.omg.CORBA.Object ref = 
                rootpoa.servant_to_reference(this);
            HeartRateMonitor monitor = HeartRateMonitorHelper.narrow(ref);
	  
            // Look up the Name Service
            org.omg.CORBA.Object nameServiceObj = 
              orb.resolve_initial_references("NameService");
            NamingContextExt nameService = 
                NamingContextExtHelper.narrow(nameServiceObj);

            // Bind (register) the Calculator Server with the Name Service
            String name = "NursesStation";
            NameComponent path[] = nameService.to_name( name );
            nameService.rebind(path, monitor);

            System.out.println("Heart Monitor Ready");

            // wait for client requests
            orb.run();

        } catch (Exception e) {
            System.err.println("ERROR: " + e);
            e.printStackTrace(System.out);
        }
    }

    // The main program simply creates a new Calculator Server
    public static void main(String [] args) {
      new NursesStation (args);
    }
}