Init function to habilite dynamic roles

Question

Hi
We want user dynamic roles at database level, we are using JAAS for security at application level, we want to habilite the roles in a database procedure in base of jaas username, but we need execute this database procedure before any other action, like an init() function, where can we execute this method ? I tried in the ApplicationModule constructor but it don't function well because I need to use the function getApplicationModule to obtain de JAAS user.
Where can I execute this method ? maybe a function at Application Module level
Thanks in advance
Liceth

Answer 1

Liceth,
With functionality like this you have to always remember that many things (such as Application Module instances en DB connections) are pooled and re-used, so the constructor of an ApplicationModuleImpl is definately NOT the place!
If I understood your problem correctly, it sounds very similar to the problem you would be facing when using Business Components together with the VPD (Virtual Private Database) feature of the Oracle Database. It boils down to you having to execute a PL/SQL procedure every time a database connection is obtained from the database connection pool when an ApplicationModule instance is checked out from the ApplicationModulePool for a particular user/session.
If you search OTN on the combination VPD and BC4J, you will certainly find some very useful documents that will probably help you implement your solution.
Kind regards,
Peter Ebell
JHeadstart Team