one session per user?
Hi,
I'm having troubles to understand how really sessions are working.
I'm using a servlet to handle every client requests and I'm using
jsp
session to display various objects between frames, such as:
HttpSession session = req.getSession(false);
Toto toto = session.getAttribute("toto");
if (toto.getName() == "mike")
toto.setInfotoDisplay("Hi mike, waza?");
else if (toto.getName() == "alain")
toto.setInfotoDisplay("Tcho alain, ca boom?");
...
session.setAttribute("toto", toto);
My concern is that I really thought that the object I
get with "getAttribute" on sessions were attached
to the according user.
But apparently not, it looks like my object Toto is shared
amongst my clients and thus everything is f up ;-(
Any idea how I could stick a session per user?
thanx,
--mike
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Re: one session per user?
mike niemaz typed the following on 09:40 AM 2/15/2001 +0100
Hi,
I'm having troubles to understand how really sessions are working.
I'm using a servlet to handle every client requests and I'm using
jsp
session to display various objects between frames, such as:
HttpSession session = req.getSession(false);
Toto toto = session.getAttribute("toto");
if (toto.getName() == "mike")
toto.setInfotoDisplay("Hi mike, waza?");
else if (toto.getName() == "alain")
toto.setInfotoDisplay("Tcho alain, ca boom?");
...
session.setAttribute("toto", toto);
My concern is that I really thought that the object I
get with "getAttribute" on sessions were attached
to the according user.
But apparently not, it looks like my object Toto is shared
amongst my clients and thus everything is f up ;-(
Any idea how I could stick a session per user?
Normally sessions do work just fine per user. However it's easy to make
mistakes with scope which can produce the kinds of problems you're
talking about: static variables, class variables in a servlet class or
%! Toto toto = new Toto() % in JSP pages, or reusing the same
object by changing its values and inserting it into a session for a
different user, etc. For example, if you have
Toto toto = new Toto();
doGet(...) {
toto.setName = ...
session.setAttribute("toto", toto);
}
In this case, the Toto object _will_ be shared between users, because
only one object is ever created.
But it's hard to say what the problem is without seeing the real code, or at
least a boiled down example of the code which you have compiled and verified
still has the problem.
Kief
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Re: one session per user?
Hi there,
First, Do u know how to code Java ? (No offence)
I give u some tips...
HttpSession session = req.getSession(false);
Toto toto = session.getAttribute("toto");
U didn't cast up there.
// should be Toto toto = (Toto) session.getAttribute("toto");
if (toto.getName() == "mike")
== is for C language if you wanna know whether both letters are
same.
// should be toto.getName().equals("mike");
toto.setInfotoDisplay("Hi mike, waza?");
else if (toto.getName() == "alain")
Here too.
toto.setInfotoDisplay("Tcho alain, ca boom?");
...
session.setAttribute("toto", toto);
Maybe your problem is not session, but your coding.
Probably you gotta learn syntax first...(No offence)
Fumitada
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Re: one session per user?
fumitada wrote:
Hi there,
First, Do u know how to code Java ? (No offence)
I give u some tips...
;-) been coding java for ages ...
Although you're right my examples are full
of mistakes but I wrote it quick the main
goal was to give the idea of the process.
--mike
nb: '==' is quicker to write than equals ;-)
HttpSession session = req.getSession(false);
Toto toto = session.getAttribute("toto");
U didn't cast up there.
// should be Toto toto = (Toto) session.getAttribute("toto");
if (toto.getName() == "mike")
== is for C language if you wanna know whether both letters are
same.
// should be toto.getName().equals("mike");
toto.setInfotoDisplay("Hi mike, waza?");
else if (toto.getName() == "alain")
Here too.
toto.setInfotoDisplay("Tcho alain, ca boom?");
...
session.setAttribute("toto", toto);
Maybe your problem is not session, but your coding.
Probably you gotta learn syntax first...(No offence)
Fumitada
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