/* * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved. * Use is subject to license terms. */package samples.ejb.stateful.simple.ejb;import java.util.*;import javax.ejb.EJBObject;import java.rmi.RemoteException;import samples.ejb.stateful.simple.tools.BookException;/** * Remote interface for the <code>CartBean</code>. The remote interface, </code>Cart</code> * defines all possible business methods for the bean. These are methods, going to be invoked * remotely by clients, once they have a reference to the remote interface. * * Clients generally take the help of JNDI to lookup the bean's home interface and * then use the home interface to obtain references to the bean's remote interface. * * @see CartHome * @see CartBean */public interface Cart extends EJBObject {     /**     * Adds a book to the cart.     * @param title title of the book.     * @exception RemoteException     */   public void addBook(String title) throws RemoteException;    /**     * Removes a book from the cart.     * @param title title of the book.     * @exception RemoteException, BookException.     */   public void removeBook(String title) throws BookException, RemoteException;    /**     * Gets the content of the cart at that instance of time.     * @return Vector containing books.     * @exception RemoteException     */   public Vector getContents() throws RemoteException;}