JDBCRealm in Tomcat 3.2

[Nacho <na...@siapi.es>]

I'm trying to something simple, i want to translate the latest changes
Craig has made in JDBCRealm on Catalina to Tomcat 3.2 Dev, a work with
no much future a think, but in the mean time... 

I want to implement the sort of cached roles Craig has put into
JDBCRealmPrincipal, but i dont found a comparable way to do the same in
Tomcat.

how can i do it ?  

Saludos ,
Ignacio J. Ortega