/*
* 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 servlets;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import cart.ShoppingCart;
import database.*;
import exception.*;
/**
* An HTTP servlet that responds to the POST method of the HTTP protocol.
* The Receipt servlet updates the book database inventory, invalidates the user session,
* thanks the user for the order. */
public class ReceiptServlet extends HttpServlet {
private BookDB bookDB;
public void init() throws ServletException {
bookDB =
(BookDB)getServletContext().getAttribute("bookDB");
if (bookDB == null)
throw new UnavailableException("Couldn't get database.");
}
public void destroy() {
bookDB = null;
}
public void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
boolean orderCompleted = true;
// Get the user's session and shopping cart
HttpSession session = request.getSession(true);
ResourceBundle messages = (ResourceBundle)session.getAttribute("messages");
ShoppingCart cart =
(ShoppingCart)session.getAttribute("cart");
if (cart == null) {
cart = new ShoppingCart();
session.setAttribute("cart", cart);
}
// Update the inventory
try {
bookDB.buyBooks(cart);
} catch (OrderException e) {
System.err.println(e.getMessage());
orderCompleted = false;
}
// Payment received -- invalidate the session
session.invalidate();
// set content type header before accessing the Writer
response.setContentType("text/html");
response.setBufferSize(8192);
PrintWriter out = response.getWriter();
// then write the response
out.println("<html>" +
"<head><title>" + messages.getString("TitleReceipt") + "</title></head>" );
// Get the dispatcher; it gets the banner to the user
RequestDispatcher dispatcher =
getServletContext().getRequestDispatcher("/banner");
if (dispatcher != null)
dispatcher.include(request, response);
if (orderCompleted)
out.println("<h3>" + messages.getString("ThankYou") +
request.getParameter("cardname") + ".");
else
out.println("<h3>" + messages.getString("OrderError"));
out.println("<p> <p><strong><a href=\"" +
response.encodeURL(request.getContextPath()) +
"/bookstore\">" + messages.getString("ContinueShopping") + "</a> " +
"</body></html>");
out.close();
}
public String getServletInfo() {
return "The Receipt servlet updates the book database inventory, invalidates the user session, " +
"thanks the user for the order.";
}
}