[prev in list] [next in list] [prev in thread] [next in thread] 

List:       tomcat-user
Subject:    Re: RV: Session & Context variables architecture problem
From:       "Pid *" <pid () pidster ! com>
Date:       2010-10-29 20:38:03
Message-ID: 8133251257197006689 () unknownmsgid
[Download RAW message or body]

Nothing like wasting your time to get job satisfaction...


p

On 29 Oct 2010, at 17:39, "falvarez@geocom.com.uy"
<falvarez@geocom.com.uy> wrote:

> Thanks Ronald and Pid for the help.
> 
> Honestly I don't know if this parameters thing is really a performance issue, but \
> I've been assigned to work on it so I don't have much choice, ;). 
> I liked the idea of a class handling the attributes in ServletContext.
> 
> I'll give it a try and let you know of the outcome.
> 
> Thanks again.
> 
> Best regards,
> Federico Alvarez.
> 
> 
> 
> 
> Lic. Federico Alvarez
> Analista Genexus
> � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � \
> � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � GEOCOM Uruguay S.A.
> Dionisio Oribe 3071 // Montevideo CP 11600 // Uruguay
> Tels.: (+598) 2 481 7777 ext. 775 / Fax.: 481 7777 ext. 718
>  EnGEOCOM  nos comprometemos con el Medio Ambiente: Antes de imprimir este \
> e-mail piense bien si es necesario. NOTA DE CONFIDENCIALIDAD: La informacion \
> transmitida en este mensaje y sus archivos adjuntos son para la persona o entidad a \
> la cual esta dirigida y puede contener material privilegiado y/o confidencial. Su \
> transmision se encuentra legalmente protegida. Si usted ha recibido este e-mail por \
> error, comuniquelo inmediatamente por esta via su autor y eliminelo de su sistema. \
> Si usted no es el destinatario especificado en el mensaje, cualquier revelacion \
> copia o distribucion de su contenido esta estrictamente prohibida. Es \
> responsabilidad del receptor asegurarse que el mensaje y sus archivos adjuntos se \
> encuentren libres de virus. El mensaje expresa la opinion de su autor pero no \
> necesariamente la de GEOCOM Uruguay S.A. Ni GEOCOM Uruguay S.A ni su autor se hacen \
> responsables por las alteraciones que pueda sufrir este mensaje a partir de su \
> envio. 
> -----Mensaje original-----
> De: Pid [mailto:pid@pidster.com]
> Enviado el: jueves, 28 de octubre de 2010 19:36
> Para: Tomcat Users List
> Asunto: Re: RV: Session & Context variables architecture problem
> 
> On 28/10/2010 18:31, falvarez@geocom.com.uy wrote:
> > Dear All,
> > I'm currently using Tomcat 6.0.28 and having some
> > doubt on how to solve and implement this problem:
> > My webapp has a MySQL Database with a
> > table named "parameters", in which we have just two columns
> > ("property" and "value"). This table is acceded many times but doesn't change \
> > often. 
> > For performance purposes I want to save
> > this parameters in the user's tomcat session, so they are read from
> > memory and not database. So far so good.
> 
> Do you actually know that this is a performance problem, or are you guessing that \
> it is? 
> > Now the problem: how can I tell this
> > sessions that an attribute has changed?
> 
> Using the session will mean that you have duplicate copies of this information in \
> each session. 
> > I had suggestions of using "context variables" instead
> > of "session variables", but that didn't solve the problem.
> 
> *If* you need to do this, using the Context is probably better.
> 
> I would suggest that you created a class which periodically updated all the values \
> by selecting the data in the DB and storing the result in the Context. 
> Implementing a ServletContextListener will give you access to the ServletContext \
> and two methods, for app startup & shutdown, which you can use to start the \
> periodic process, and properly stop it (very important). 
> You may consider using a Timer, or something from the java.util.concurrent package.
> 
> 
> p
> 
> > Any help in this matter is more than welcome. I have no problem in
> > changing the approach, and may be not use sessions at all.
> > 
> > Thanks in advance.
> > 
> > Best regards,
> > 
> > Federico Alvarez.
> > 
> > Info:
> > 
> > Tomcat 6.0.28
> > Java 1.6
> > MySQL 5.5
> > 
> > NOT USING HIBERNATE, so 2nd Level cache is not an
> > option
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org


[prev in list] [next in list] [prev in thread] [next in thread]