Re: reusable controllers and session objects

Sure, np

If you're using ControllerSingleton (or FormBeanUser as it implements
ControllerSingleton) you should use the latest version of Maverick from CVS
as a bug that was fixed two weeks ago had the effect that
init(controllerNode) was never called for implementors of
ControllerSingleton.

Eelco

----- Original Message -----
From: "Valeri Sarantchouk" <[email protected]>
To: <[email protected]>
Sent: Saturday, March 29, 2003 10:10 PM
Subject: Re: [Mav-user] reusable controllers and session objects


> Hi Eelco,
>
> Thank you! I took a look at Maverick's source code, and
> found it: I can simply subclass ControllerSingleton and
> use object pools from the subclass.
>
> Cheers,
>
> Valeri
>
> ---
>
>
>
>
>
> On Sat, 29 Mar 2003 21:46:42
>  Eelco Hillenius wrote:
> >I am not sure that understand you well, but...
> >
> >You can still use sessions (and all other servlet stuff) in Maverick.
Just
> >get it like getCtx().getRequest().getSession().
> >
> >If you are working with expensive controllers (controllers that have to
do a
> >lot of initialising or have a lot of fields) you can extend
> >org.infohazard.maverick.ctl.FormBeanUser or implement
> >org.infohazard.maverick.flow.ControllerSingleton. This way, your
controllers
> >are created only once. Be sure to read the javadocs and explore the code
of
> >the org.infohazard.maverick.ctl package to clearify things ;-)
> >
> >And of course... use inheritance to factor common behaviour in your
> >controllers. As for the object pool, sure you can use whatever you think
> >suits you; Maverick won't stop you!
> >
> >Hope that helps a bit,
> >
> >Eelco
> >
> >
> >----- Original Message -----
> >From: "Valeri Sarantchouk" <[email protected]>
> >To: <[email protected].>
> >Sent: Saturday, March 29, 2003 9:14 PM
> >Subject: [Mav-user] reusable controllers and session objects
> >
> >
> >> Dear Maverick experts,
> >>
> >> I am trying to apply Maverick to a "framework-less" web
> >> application, and my question is a very basic one.
> >>
> >> I am trying to avoid creating new objects at every request.
> >> Is it possible to use a servlet as a (Trhowaway2)
> >> Controller? Or other reusable accross requests conroller.
> >>
> >> Situation: I have a servlet that checks if there is a
> >> Client object in the user's session. If yes, the Client
> >> object is reused, otherwise a new Client instance is
> >> created. The Client object looks like this:
> >>
> >> public class Client{
> >>
> >>    private ClientModel model;
> >>    private ClientModelHandler modelHandler;
> >>
> >>    private CardViewHandler cardViewHandler;
> >>    private FormViewHandler formViewHandler;
> >>    private FormPrintHandler formPrintHandler;
> >>
> >>    // methods go here...
> >> }
> >>
> >> ClientModel has 38 fields and its creation and rendering
> >> are costly operations. Plus we have at least 70 concurrent
> >> users (accessing the same view at the same time) at low
> >> periods and 350+ at high, so creating new objects for each
> >> request and passing old ones to gc doesn't look good from
> >> performace point of view.
> >>
> >> In "old" application, I use an object pool to get instances
> >> of Client objects for new users; and re-use Client objects
> >> found in user's session for logged-in users.
> >>
> >> Can you advise me on how to replicate an object pool with
> >> Maverick and how to reuse the same object found in session?
> >>
> >> Thank you very much!
> >>
> >> Valeri
> >>
> >>
> >>
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