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From "Nathan Bubna" <nbu...@gmail.com>
Subject Re: AbstractPagerTool
Date Wed, 02 May 2007 19:33:54 GMT
On 5/2/07, deepak va <deepakva@hotmail.com> wrote:
> please let me know what you meant by "if there is an HttpSession for the
> request" .
> How so i set the same.

are you familiar with the servlet API?
http://java.sun.com/products/servlet/2.5/docs/servlet-2_5-mr2/index.html

Specifically, you should read:
http://java.sun.com/products/servlet/2.5/docs/servlet-2_5-mr2/javax/servlet/http/HttpSession.html

> I modified the code as below. But for every request the setItems(tradelist)
> is getting called.
>
> Please suggest what iam missing.

try adding:

this.session = request.getSession(true);

before the call to setItems(tradelist);

>
> >From: "Nathan Bubna" <nbubna@gmail.com>
> >Reply-To: "Velocity Users List" <user@velocity.apache.org>
> >To: "Velocity Users List" <user@velocity.apache.org>
> >Subject: Re: AbstractPagerTool
> >Date: Tue, 1 May 2007 14:09:52 -0700
> >
> >setup(HttpServletRequest) is called every request.  you only want to
> >call setItems() once per list being paginated.   if there is an
> >HttpSession for the request, then the call to setItems() will try to
> >store the item list in the session.  this would then let you do:
> >
> >public void setup(HttpServletRequest req)
> >       {
> >                       ParameterParser pp = new ParameterParser(req);
> >                       setIndex(pp.getInt("index",0));
> >                       setItemsPerPage(pp.getInt("show", 10));
> >
> >                       setSlipSize(10);
> >
> >                       if (!hasItems()) {
> >                            List tradelist = getDataFromDatabase();
> >                            setItems(tradelist);
> >                       }
> >       }
> >
> >in general, though, it is up to you to see that setItems() isn't
> >called on every request.  the solution above will work if the item
> >list never changes, but they often do.  so, you'll probably also want
> >to create some hook to refresh the item list when appropriate.
> >
> >
> >On 5/1/07, deepak va <deepakva@hotmail.com> wrote:
> >>Hi ,
> >>
> >>Iam using the AbstractPagerTool for pagination.
> >>
> >>I have written a Test class which extends AbstractPagerTool. Test class
> >>has
> >>the below code.
> >>For every click on the pagination link a call is made to the database for
> >>fetching the records.
> >>This is not the expected behaviour. We want to get the values once from
> >>the
> >>database and use it subsequently.
> >>
> >>Please suggest how to achieve this.
> >>
> >>
> >>*****************************************
> >>public void setup(HttpServletRequest req)
> >>         {
> >>                         ParameterParser pp = new ParameterParser(req);
> >>                         setIndex(pp.getInt("index",0));
> >>                         setItemsPerPage(pp.getInt("show", 10));
> >>
> >>                         setSlipSize(10);
> >>
> >>                 List tradelist = getDataFromDatabase();
> >>                         setItems(tradelist);
> >>
> >>
> >>         }
> >>
> >>
> >>**************************************
> >>
> >>Regards
> >>Deepak
> >>
> >>_________________________________________________________________
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