bagaimana cara menggunakan di RMI (Kode sisi klien) suatu peristiwa yang ditentukan dalam kode sisi server?

Di RMI (kode sisi klien), bagaimana saya bisa menggunakan peristiwa yang ditentukan dalam kode sisi server?

Misalnya, kode sisi server berikut mendefinisikan acara PropertyChangeSupport.

Bagaimana cara menerapkannya di sisi klien?

package rmiservice.services.calculator;

import java.beans.PropertyChangeSupport;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.LinkedList;
import java.util.Queue;

public class CalculatorService extends UnicastRemoteObject implements ICalculator {
private Queue<Integer> numbers = new LinkedList<Integer>();
private Integer result;
***private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);***


public CalculatorService() throws RemoteException {
    super();

}


public void start() throws Exception {
    java.rmi.registry.LocateRegistry.createRegistry(1099);
    Naming.bind("CalculatorService", this);
    System.out.println("Calculator Service is Run  . . .");
}

public void stop() throws Exception {

    Naming.unbind("CalculatorService");
    UnicastRemoteObject.unexportObject(this, true);

    System.out.println("Calculator Service is Stop . . .");

}

//-------------------------------------------------------------------
//------------------------------ Implements ICalculator -------------

public void addNumber(Integer number) throws Exception {
    numbers.add(number);
}

public Integer getResult() throws Exception {
    return this.result;
}

public void setResult(Integer result) throws Exception {
    Integer oldResult = this.getResult();
    this.result = result;
    ***propertyChangeSupport.firePropertyChange("result", oldResult, result);***
}

public void calculate(Operation operation) throws Exception {
    Integer _result = 0;

    if (numbers.size() < 2)
        return;

    switch (operation) {
        case Add: {
            _result = 0;
            while (numbers.size() > 0) {
                _result += numbers.poll();
            }
            break;
        }

        case Substract: {
            _result = numbers.poll();
            while (numbers.size() > 0) {
                _result -= numbers.poll();
            }
            break;
        }

    }

    this.setResult(_result);

}
//-------------------------------------------------------------------

}