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Posted to users@tomcat.apache.org by Mark <se...@yahoo.com> on 2007/03/30 16:09:47 UTC
problem: accessing object created in servlet from jsp
Hi,
I try to send an object from servlet to jsp using following:
req.setAttribute("NP", target);
...
getServletContext().getRequestDispatcher("/my.jsp").forward(req,
res);
in my.jsp I have:
<% String wa = (String)request.getParameter("NP"); %>
<%if (wa == null) wa = "blank";%>
<% out.print(wa); %>
But it doesn't work :( "blank" always get displayed, which means I'm
not getting the object from request in jsp.
I have Tomcat 5.5.20, Java 1.5.0_10 knoppix 2007-01 with 2.6.19
kernel
Can any body tell how to set an object to be accessable to JSP
without using session.
Thanks,
Mark
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Re: problem: accessing object created in servlet from jsp
Posted by Hassan Schroeder <ha...@gmail.com>.
On 3/30/07, Mark <se...@yahoo.com> wrote:
> I try to send an object from servlet to jsp
> <%if (wa == null) wa = "blank";%>
> But it doesn't work :( "blank" always get displayed, which means I'm
> not getting the object from request in jsp.
Or the object really is null :-)
Does it show up if you put it in the session instead?
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
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Re: problem: accessing object created in servlet from jsp
Posted by Mark <se...@yahoo.com>.
Oh, what a typo!
Thanks a lot!
Mark
--- Mikolaj Rydzewski <mi...@ceti.pl> wrote:
> Mark wrote:
> > req.setAttribute("NP", target);
> > [...]
> > <% String wa = (String)request.getParameter("NP"); %>
> >
> They simpy do not match ;-)
> Use request.getAttribute() instead.
>
> --
> Mikolaj Rydzewski <mi...@ceti.pl>
>
>
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Re: problem: accessing object created in servlet from jsp
Posted by Mikolaj Rydzewski <mi...@ceti.pl>.
Mark wrote:
> req.setAttribute("NP", target);
> [...]
> <% String wa = (String)request.getParameter("NP"); %>
>
They simpy do not match ;-)
Use request.getAttribute() instead.
--
Mikolaj Rydzewski <mi...@ceti.pl>
Re: Static class across multiple tomcats?
Posted by or...@kewlstuff.co.za.
I think sharing a common class across servlets can get tricky... I've never
tried it using Tomcats intrinsic technology, but I think if you if you want
to go this way then read up on
the ServletContextListener. Lets you look at what other servlets are up to,
so you could make something that looks at servlet 1 and if it hasnt made the
common resource then, servlet 2 will make it... then when servlet 1 starts
it checks servlet 2, see's its already running and uses that.... mmmmmm I
dont like it, think code could get very messy.
What I do for for this kind stuff is use Harbor....
So I would make the shared class, dump it in the Harbor servlet and then
call it from other servlets... Harbor is a very lite application server. I
wrote Harbor and I'm keen to test it on this sort of application, so if you
care to give me the test code of your shared object, I make 2 servlets and
show you how to share the object across all your servlets.... even if they
run on different machines. If you interested have a look at
http://coolese.100free.com/
regards,
Johnny
----- Original Message -----
From: "James Sherwood" <js...@rgisolutions.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Friday, March 30, 2007 4:19 PM
Subject: Static class across multiple tomcats?
> Hello,
>
> What I am trying to do is to have a thread running to check a database for
> something at a certian time.
>
> All is well but when we launch both tomcats, there are 2 threads running
> and I cannot figure out how to have only 1 thread running as it seams
> static classes are unique to each tomcat.
>
> Any ideas?
> Thanks,
> James
>
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>
>
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Re: Static class across multiple tomcats?
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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James,
James Sherwood wrote:
> All is well but when we launch both tomcats, there are 2 threads running
> and I cannot figure out how to have only 1 thread running as it seams
> static classes are unique to each tomcat.
It sounds like you want something that is entirely outside of either of
the webapps, then.
- -chris
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Static class across multiple tomcats?
Posted by James Sherwood <js...@rgisolutions.com>.
Hello,
What I am trying to do is to have a thread running to check a database for
something at a certian time.
All is well but when we launch both tomcats, there are 2 threads running and
I cannot figure out how to have only 1 thread running as it seams static
classes are unique to each tomcat.
Any ideas?
Thanks,
James
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