You have to write a class which implements org.apache.shiro.realm.Realm or
extends one of the existing Realms in that package and add it to your Shiro
Inside your custom Realm you would have to lookup user credentials stored in
your Weblogic server and create an AuthenticationToken for the specific user
trying to login in.
This part is very special to Weblogic and probably differs completely from
any other application server. I have not worked with Weblogic servers for
many years now, so I cannot point you in the right direction there, but
maybe someone else can pitch in here?
It is an AuthenticationInfo, not an AuthenticationToken - my bad.