package test;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
/**
* The ColorSessionServlet demonstrates the session management
* mechanisms built into the servlet API. A session is
* established and the client's preferred background color
* as well as the number of times they have requested the
* servlet are stored.
*
* @author Dustin R. Callaway
* @version 1.0, 08/05/98
*/
public class ColorSessionServlet extends HttpServlet
{
/**
* init method is called when servlet is first loaded.
*/
public void init(ServletConfig config) throws
ServletException
{
super.init(config); //pass ServletConfig to parent
}
/**
* service generates HTML pages that allows the client to
* choose a color and then remembers the color on future
* requests.
*/
public void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException,
IOException
{
String name; //name of user
String color; //user's color preference
Integer hitCount; //# of times user has requested servlet
//get current session, create if it doesn't exist
HttpSession mySession = request.getSession(true);
//MIME type to return is HTML
response.setContentType("text/html");
//get a handle to the output stream
PrintWriter out = response.getWriter();
if (mySession.isNew()) //first time client requests page
{
//generate HTML form requesting name and color preference
out.println("");
out.println("");
out.println("Color Selector");
out.println("");
out.println("");
out.println("