Weblogic RDBMS Realm

I am trying to migrate my application into weblogic 7.0.But the problem is weblogic 7.0 does'nt support RDBMS realm.So can anyone help me out in this.I found some stuuf from the net.They say you have to write your own SecurityProvider.I am really really confused.Any help will be highly appreciated.

Thanx.

[320 byte] By [Jguya] at [2007-11-26 21:43:42]