There seems to be no detailed documentation for authorization modules in the AS7 documentation (only module names/classes are mentioned in the https://docs.jboss.org/author/display/AS71/Security+subsystem+configuration)
I've tried to implement XACML PEP test cases to cover JBQA-5146 and as a start point I've used the Anil's sample from the article http://server.dzone.com/articles/security-features-jboss-510-1
But it seems, the XACMLAuthorizationModule is not initialized at all.
Please, have a look at org.jboss.as.test.integration.security.xacml.XACMLAuthorizationModuleTestCase in the branch JBQA-5146-basicPEP in https://github.com/kwart/jboss-as/.
Am I missing some configuration point?