// From "Professional Java Server Programming", Patzer et al.,
// Edition J2EE, Ch 9, pg 401
// Import Servlet Libraries
import javax.servlet.*;
import javax.servlet.http.*;
// Import Java Libraries
import java.io.*;
import java.util.Date;
public class sessionLifeCycle extends HttpServlet
{
public void doGet (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
String action = request.getParameter ("action");
if (action != null && action.equals ("invalidate"))
{ // Called from the invalidate button, kill the session.
// Get session object
HttpSession session = request.getSession ();
session.invalidate();
response.setContentType ("text/html");
PrintWriter out = response.getWriter ();
out.println ("");
out.println ("");
out.println (" Session Lifecycle");
out.println ("");
out.println ("");
out.println ("");
out.println ("");
out.println ("Your session has been invalidated.
");
// Create a link so the user can create a new session.
// The link will have a parameter builtin
String lifeCycleURL = "/offutt/servlet/sessionLifeCycle";
out.println ("");
out.println ("Create new session");
out.println ("");
out.println ("");
out.close();
} //end if
else
{ // We were called either directly or through the reload button.
// Get session object
HttpSession session = request.getSession ();
response.setContentType ("text/html");
PrintWriter out = response.getWriter ();
out.println ("");
// no-cache lets the page reload by clicking on the reload link
out.println ("");
out.println ("");
out.println (" Session Lifecycle");
out.println ("");
out.println ("");
out.println ("");
out.println ("Session Life Cycle
");
out.print ("
Session Status: ");
if (session.isNew())
{
out.println ("New Session.");
}
else
{
out.println ("Old Session.");
}
// Get the session ID
out.print ("
Session ID: ");
out.println (session.getId());
// Get the created time, convert it to a Date object
out.print ("
Creation Time: ");
out.println (new Date (session.getCreationTime()));
// Get the last time it was accessed
out.print ("
Last Accessed Time: ");
out.println (new Date(session.getLastAccessedTime()));
// Get the max-inactive-interval setting
out.print ("
Maximum Inactive Interval (seconds): ");
out.println (session.getMaxInactiveInterval());
String lifeCycleURL = "/offutt/servlet/sessionLifeCycle";
out.print ("
");
out.println ("Invalidate the session");
out.print ("
");
out.println ("Reload this page");
out.println ("");
out.println ("");
out.close();
} //end else
} // End doGet
} //End sessionLifeCycle