Java servlet / JSP assistance needed!! 1

[frag]

Hey guys!

Can someone please explain this to me:
pageContext.removeAttribute("dbcon",PageContext.SESSION_SCOPE);

"dbcon" is a JavaBean created by myself, and my scope is "application" NOT "session"... s-)

This piece of code is from an example from a book and I tried to make it suitable for my project (which includes connecting to a DB).

Thanx for your help...

frag patrick.metz@epost.de

 

[frag]

Uhh... almost forgot... there is a second issue:


<jsp:useBean id=&quot;dbcon&quot; scope=&quot;application&quot; class=&quot;com.dresdnerkw.supportcall.DatabaseConnection&quot;>
<% session.invalidate(); %>
<jsp:forward page=&quot;LoginView.jsp&quot; />
</jsp:useBean>

The <jsp:useBean> tag is perfectly fine. But why hasn't the tag been closed and WHEN is the code inside of it processed?
I don't find anything about this in any API's!!

Thanx for your patience!

frag patrick.metz@epost.de

 

[Guest_imported]

The code between the usebean tags gets executed IF there is anew bean created, i.e. if no existing bean with the same id and scope is found

 

[frag]

Thanx for your reply!

Let me see if I got this right:
The tag creates a new instance of &quot;DatabaseConnection&quot; and
if there is already an instance with the same ID it will kick it out of the memory and shot a forward to the LoginView-page ??

bye

frag patrick.metz@epost.de

 

[manu0]

no frag,

if an object named &quot;dbcon&quot; already exists in the &quot;application&quot; scope, no other object is created and the code between the <jsp:useBean > tags will not be executed.

manu0

 

[frag]

Thank you manu0!

So, I'll have to use this tag for every JSP-page in my project if I want to redirect to the page &quot;LoginView.jsp&quot; (if no &quot;dbcon&quot; object is present)!?!

This helped a lot guys!!!
Sorry, just forgot to give a vote to all of you. :-(

cya

frag patrick.metz@epost.de

 

[saddysan]

hello friends,
i am making a simple registeration form in jsp.
after checking username & password i want registered user should be forwarded to &quot;welcome.jsp&quot; while invalid users to &quot;invalid.jsp&quot;.
but the problem is that all the checking of username and password takes place in scriplets and <jsp:forward> cannot be embedded into it.
can anybody suggest a method to do it
any help will be appericiated
thanks

saddy

 

[tiz]

response.sendRedirect(&quot;invalid.jsp&quot;

? --
Tim <tim@planetedge.co.uk>