Thank you I solve it using session, particularly:
pageContext.getSession().setAttribute("InQry", qry);

and retreive it in the servlet like this:
String inQry = (String)request.getSession().getAttribute("InQry");

But, I have a question regarding DBCP, it is not wrong to have more than one
CP, isn't it? I mean is it allowed to have a Resource for Oracle and another
for MySql?


On 7/24/07, David Smith <dns4@(protected):
>
> Can you post the relevant parts of how/where you call this servlet?
> I've never had a problem retrieving a request attribute after it was
> added and before the end of the request.
>
> --David
>
> Mohammed Zabin wrote:
> > Actually, I wanted to pass this list from within a Tag to be used inside
> > another Servlet class, (i.e. the tag class after finishing rendering its
> > elements, goes to a servlet, so, i need to pass this list to that
> > servlet.
> > As i have stated above, i used the following to store the list in the
> > request object:
> >
> > [code]pageContext.getRequest().setAttribute("QList", list);[/code]
> >
> > In the servlet, i used the following to retrive the list:
> >
> > List<Integer> list = (List<Integer>)request.getAttribute(
> > "QList");
> >
> > I tried to access the above list by a small code snippet that prints its
> > size:
> > [code]out.println( list.size() );[/code]
> > But i got an exception stating that a NullPointerException has occured
> at
> > the size printing statement. That's mean, i think, the list didn't
> stored
> > correctly in the request object, am I true?
> >
> >
> > On 7/23/07, David Smith <dns4@(protected):
> >>
> >> Typical design is servlet forwarding to jsp for view. Tags being jsp
> >> elements occur after servlets have executed. So you can see how your
> >> problem is a little curious in that jsps don't typically forward to
> >> servlets. If you are forwarding a request from jsp to servlet, let us
> >> know.
> >>
> >> However if you are storing a object in a request during jsp execution
> >> intending it to be available to the servlet on the next request, that
> >> doesn't work. The request is cleared and recycled when jsps finish
> >> writing to the client. When a new request comes in, the request
> >> attribute list is empty. If you need this list to live between
> >> requests, you need to place it in the session.
> >>
> >> --David
> >>
> >> Mohammed Zabin wrote:
> >>
> >> > Thank you Johnny,
> >> > To be specific this is my question
> >> > Hi all
> >> >
> >> > I am trying to pass an object from a tag to a servlet. i did the
> >> > following,
> >> >
> >> > 1. In the tag class, i put:
> >> >
> >> > pageContext.getRequest().setAttribute("QList", list);
> >> >
> >> >
> >> >
> >> > The above Tag will go to a servlet, i need to read the above request
> >> > attribute in the servlet, how can i do this?, i tried
> >> >
> >> > List<Integer> list = (List<Integer>)request.getAttribute("QList");
> >> >
> >> > , but when i tried to access the read list, it gave me
> >> > NullPointerException...What do u think?
> >> >
> >> >
> >> > On 7/23/07, Johnny Kewl <john@(protected):
> >> >
> >> >>
> >> >> Hi Mohammed,
> >> >> Cant say I really understand the question....
> >> >>
> >> >> In general this is what the Session Objects are for....
> >> >> So say you have a servlet and a JSP page.... and say the servlet
> >> >> makes the
> >> >> bean with the Array List in it.... then if you
> >> >>
> >> >> session.setAttribute("MyBean", MyBean);
> >> >>
> >> >> you can get it (MyBean) back when the next call comes into say the
> >> JSP
> >> >> page....
> >> >>
> >> >> Now if you read up on this you will see you can also set 'request'
> >> >> objects.... and these are good for when you say dispatch a request
> >> to a
> >> >> JSP
> >> >> page from the servlet and want to pass a bean across.
> >> >>
> >> >> Anyway... if you just google for "servlet session and
> >> setAttribute"....
> >> >> you
> >> >> will be on your way... I think ;)
> >> >> This area of servlet programming is one of the things that make it
> >> >> such a
> >> >> powerful technology.
> >> >> Have fun...
> >> >>
> >> >> ----- Original Message -----
> >> >> From: "Mohammed Zabin" <jotnarta@(protected)>
> >> >> To: "Tomcat Users List" <users@(protected)>
> >> >> Sent: Monday, July 23, 2007 11:18 AM
> >> >> Subject: Bean and Servlet
> >> >>
> >> >>
> >> >> > Hi All
> >> >> > What is the best way to pass a list collection from a Bean to a
> >> >> Servlet?
> >> >> > Thank you
> >> >> >
> >> >>
> >> >>
> >> >>
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> >> >> To unsubscribe, e-mail: users-unsubscribe@(protected)
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> >> >>
> >> >>
> >> >
> >>
> >>
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> >>
> >>
> >
>
>
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