Błąd przy Kompilowaniu projektu Web Dynamic Project opartego na JavaBeans.

Question

Witam. Planowałem się podszkolić w zakresie korzystania z JavaBeans i stworzyłem projekt (Dynamic Web Project) w Eclipse bazujący na https://docs.oracle.com/javaee/5/tutorial/doc/bnbod.html?fbclid=IwAR1XlV-k6bF8H07EX1JG5Fr62CHznqac3wN4fRv7-hYOc8ji2nN0Mi8U26Q#bnboj. Mam w Eclipse skonfigurowany serwer WildFly pod Java EJB i nie wiem co powinienem dodać/zmienić abym zobaczył wynik mojego kodu. Może coś z formularzem i request.getParameter() by się przydało dodać, nie wiem. Liczę na waszą pomoc.

 

Oto struktura projektu(pliki w webapp są wygenerowane domyślnie)

package pakietInterfejsow;

import java.util.List;
import javax.ejb.Remote;
import Exceptions.BookException;
@Remote
public interface Cart {
    public void initialize(String person) throws BookException;
    public void initialize(String person, String id)
         throws BookException;
    public void addBook(String title) throws BookException;
    public void removeBook(String title) throws BookException;
    public List<String> getContents();
    public void remove();
}

package Exceptions;

public class BookException extends Exception {
	private static final long serialVersionUID = 1L;

	public BookException() {
        super();
    }

    public BookException(String message) {
        super(message);
    }

    public BookException(String message, Throwable cause) {
        super(message, cause);
    }

    public BookException(Throwable cause) {
        super(cause);
    }

}

 

import java.util.ArrayList;
import java.util.List;
import javax.ejb.Stateful;
import Exceptions.BookException;
import jakarta.ejb.Remove;

@Stateful
public class CartBean implements pakietInterfejsow.Cart{

	String customerName;
	String customerId;
	List<String> contents;
	
	@Override
	public void initialize(String person) throws BookException {
		// TODO Auto-generated method stub
		if(person == null) {
			throw new BookException("Null person not allowed.");
		}else {
			this.customerName = person;
		}
		customerId = "0";
		contents = new ArrayList<String>();
	}

	@Override
	public void initialize(String person, String id) throws BookException {
		// TODO Auto-generated method stub
		if(person == null) {
			throw new BookException("Null person not allowed.");
		}else {
			this.customerName = person;
		}
		IdVerifier idChecker = new IdVerifier();
		if(idChecker.validate(id) == true) {
			this.customerId = id;
		} else {
			throw new BookException("Invalid id:" + id);
		}
		contents = new ArrayList<String>(); 
	}

	@Override
	public void addBook(String title) throws BookException{
		// TODO Auto-generated method stub
		if(title == null || title.isEmpty())
			throw new BookException("Invalid title.");
		else
			contents.add(title);
	}

	@Override
	public void removeBook(String title) throws BookException {
		// TODO Auto-generated method stub
		boolean result = contents.remove(title);
		if(result == false) {
			throw new BookException(title + " is not in a cart.");
		}
	}

	@Override
	public List<String> getContents() {
		// TODO Auto-generated method stub
		return contents;
	}

	@Remove
	public void remove() {
		// TODO Auto-generated method stub
		contents = null;
	}
	
}

public class IdVerifier {
	boolean validate(String id) {
		return id!=null && !id.isEmpty();
	}
}