Use of Tomcat DB pooling for webapps

Hello everybody,

I developped a webapp under a Tomcat 4.1.31 not included in Jahia
In this webapp, i use a global naming resource (a tomcat connection 
pool) that i declare in TOMCAT_HOME/conf/server.xml
I declare the context of my webapp and the resource link in this file too.

So now, i want to import my webapp into jahia.
How can i do in order to use a tomcat connection pool? Where is declared 
my webapp's context (i've included it with automatic deployement)? I've 
not found such an xml file up to now.

Thanks a lot!

Guillaume