Re: 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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