import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class VendingMachine4 extends HttpServlet {
String [] snacks = {"Chips", "Popcorn", "Peanuts", "Snickers bar",
"Twix", "Pop Tarts", "Chocolate Donut"} ;
String selectURL = "http://sirah.csit.fsu.edu:8089/dbc/servlet/VendingMachine4" ;
String viewURL = "http://sirah.csit.fsu.edu:8089/dbc/servlet/VendingView4" ;
Random rand = new Random() ;
static HashMap sessionTable = new HashMap() ;
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html");
String sessionID = getCookieValue(request, "vending_machine_session") ;
if(sessionID == null || sessionTable.get(sessionID) == null) {
sessionID = "" + rand.nextInt() ;
response.addCookie(new Cookie("vending_machine_session",
sessionID)) ;
sessionTable.put(sessionID, new Vector()) ;
} else {
String selection = request.getParameter("selection") ;
if(selection != null) {
Vector selections = (Vector) sessionTable.get(sessionID) ;
selections.addElement(selection) ;
}
}
PrintWriter out = response.getWriter();
out.println("");
for(int i = 0 ; i < snacks.length ; i++) {
out.println("");
}
out.println("" +
"View current selections") ;
out.println("");
}
String getCookieValue(HttpServletRequest request, String name) {
Cookie [] cookies = request.getCookies() ;
for(int i = 0 ; i < cookies.length ; i++) {
Cookie cookie = cookies [i] ;
if(cookie.getName().equals(name))
return cookie.getValue() ;
}
return null ;
}
}