Package listeners

Source Code of listeners.ContextListener

/*
* Copyright (c) 2002 Sun Microsystems, Inc.  All rights reserved.  U.S.
* Government Rights - Commercial software.  Government users are subject
* to the Sun Microsystems, Inc. standard license agreement and
* applicable provisions of the FAR and its supplements.  Use is subject
* to license terms. 
*
* This distribution may include materials developed by third parties.
* Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks
* or registered trademarks of Sun Microsystems, Inc. in the U.S. and
* other countries. 
*
* Copyright (c) 2002 Sun Microsystems, Inc. Tous droits reserves.
*
* Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel
* commercial. Les utilisateurs gouvernementaux sont soumis au contrat de
* licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions
* en vigueur de la FAR (Federal Acquisition Regulations) et des
* supplements a celles-ci.  Distribue par des licences qui en
* restreignent l'utilisation.
*
* Cette distribution peut comprendre des composants developpes par des
* tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE
* sont des marques de fabrique ou des marques deposees de Sun
* Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
*/

package listeners;

import database.BookDBAO;
import javax.servlet.*;

public final class ContextListener
    implements ServletContextListener {
    private ServletContext context = null;

    public void contextInitialized(ServletContextEvent event) {
         context = event.getServletContext();
        
         try {
            BookDBAO bookDBAO = new BookDBAO();
            context.setAttribute("bookDBAO", bookDBAO);
         } catch (Exception ex) {
            System.out.println("Couldn't create bookstore database bean: " + ex.getMessage());
         }
    }
     
    public void contextDestroyed(ServletContextEvent event) {
         context = event.getServletContext();
         BookDBAO bookDBAO = (BookDBAO)context.getAttribute("bookDBAO");
         if (bookDBAO != null)
           bookDBAO.remove();
         context.removeAttribute("bookDBAO");
    }
}
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