Unfortunately that article is out dated.
You should use the information provided in the https://github.com/jboss-developer/jboss-picketlink-quickstarts/tree/master/picketlink-authentication-facebook
quickstart. It gives you the power of authentication and authorization capabilities via the PicketLink Framework. Refer to http://www.picketlink.org
I can see that thanks, but is there any updated documentation on how to implement facebook login with a Security Domain, that is the only part that I am missing, or any other reference. Even if it is with 2.6. or higher.