On 5/28/05, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> Hello everyone!
>
> Both all my pages and components need to perform the same database queries
> where client specific stuff (language, country) determines how they are
> rendered.
>
> (a) would it be a good idea to do everything in BasePage and let
> BaseComponent do a getPage() and then call all methods on there ?
Personally i don't use pages to do my logic. I'd rather use my
Business Layer. Anyway, depends on you, it's a design issue. If you
use a logic from many components, then put that logic in the page. If
you use the logic from one or to components, let's put that logic in
the page.
> (b) imagine there are 10 possible groups of users and 10 possible kinds of
> sql queries for all users/visitors. These are never changing, so where and
> how would I cache those queries,
You can put that caché in many places. Can be a map in the Global.
Perhaps in your database.
> (c) is it correct that instance variables within page classes are forbidden?
>
> e.g.
>
> Something something = null;
>
> public Something getSomething(){
> if (something!=null) {
> return something;
> }
> else {
> something=getFromDatabase(clientSpecificParameters),
> return someting ?
> }
> }
>
> Would that be threadsafe? Or would users get random data belonging to other
> users?
It's thread safe. But it will NOT WORK. The same user for different
request can get different Page instances. And different users can get
the same page instance.
It's better to cache that thigs out of Page classes, and get those
things from Visit, Global, ThreadLocal variables, or whatever you want
to use.
>
> Thanks!
>
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