import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class AutoServlet2
*/
public class AutoServlet2 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
//client browser will request the page every 5 seconds
HttpSession session = request.getSession();
session.setMaxInactiveInterval(7);
Integer refresh = (Integer) session.getAttribute("refreshRate");
if(refresh==null)
session.setAttribute("refreshRate", new Integer(5));
session = request.getSession();
Integer times = (Integer) session.getAttribute("times");
if (times == null)
session.setAttribute("times", new Integer(0));
int temp = 1;
if (times != null)
temp = (times.intValue()) + 1;
response.addHeader("Refresh", session.getAttribute("refreshRate").toString());
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
out.println("Client Refresh");
out.println("This page is automatically refreshed every "+session.getAttribute("refreshRate")+" seconds");
out.print("
");
//More HTML or dynamic content
out.println("This page has been refreshed " + temp + " times.");
session.setAttribute("times", temp);
out.println("");
out.close();
} //end doGet
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
HttpSession session = req.getSession();
String refresh = req.getParameter("refreshRate");
if(refresh!=null)
session.setAttribute("refreshRate", new Integer(refresh));
doGet(req, resp);
}
}