Re: reusable controllers and session objects

Eelco,

Do you know by any chance if it possible to have
a controller which itself can be borrowed from some 
kind of controller factory? Similar to servlet thread pool.

Thanks,

Valeri

---





On Sat, 29 Mar 2003 22:31:30  
 Eelco Hillenius wrote:
>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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