Nothing like wasting your time to get job satisfaction...
p On 29 Oct 2010, at 17:39, "falva...@geocom.com.uy" <falva...@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:p...@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, falva...@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-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
