jsp-servletListener

[Marko Debac]

Hi to all,
I have I problem: I construct for the first time HttpBindingListiner; valueBound, for input data from database into session on

HttpSession session=request.getSession() 

witch will occure in someJsp.jsp. But to get file from database I need an information about that particular user witch for who session is; like user_id - to make some query. So I need somehow to forward that information in valeBound, because that information must be ready before session is created.
In jsp:

  
//I have it here before session created
//but it is not in session
HttpSession session=request.getSession()      
// and here is to late

I had try with setRequest, but I cant getRequest from valueBound, because it must be called from doPost, and when I put doPost, then Listeners wont work inside it.

Plese help

[Christophe Verré]

I can't see the relation between getSession and a BindingListener...
Maybe you're looking for HttpSessionListener instead.

[Marko Debac]

We are talking about HttpSessionBindingListiner, who is triggered on create session(valueBound) and on destroy session(valueUnbound)

[Chetan Parekh]

Marko Debac, if I am not wrong, you want to execute some code before session(valueBound). Am I right?

[Stefan Evans]

Actually, the SessionBindingListener is fired when an object is put into session, not when a session is created.

User user = new User("Bob");
session.setAttribute("user", user);

At this point a SessionBindingEvent would get fired on the "user" object.

Your User object is what implements the interface so you would have

public class User implements HttpSessionBindingListener, Serializable{
  Integer id;
  String name;
 
  //assume appropriate get/set methods.  
 
  public void valueBound(HttpSessionBindingEvent event){
    HttpSession session = event.getSession();
    String attributeBoundTo = event.getName();
    System.out.println("User " + getId() + " successfully bound to session" + session.getId());
  }
 
  public void valueUnbound(HttpSessionBindingEvent event){
    HttpSession session = event.getSession();
    String attributeBoundTo = event.getName();
    System.out.println("User " + getId() + " unbound from session" + session.getId());
  }
}

[Kaveriappa Poonacha]

if I've got your question right: you want to authenticate the user & have the login info before anything else.
authenticate the user making the request by any of the four authentication methods:
Basic authentication.
Client Certificate authentication.
Digest authentication.
Form authentication.

Once the user authenticated you can obtain the login of the user from the request object:
java.lang.String httpServletRequest.getRemoteUser().
There is more to Java security, authentication / authorization; have barely scratched the surface n you've set me on the trail. have experimented with Basic and Form authentication.
am requesting the ranch rangers to suggest resources n hard books to start off with.