[jboss-as7-dev] multiple instances of AS per VM?

Do we have any use cases where we need to support multiple instances of the AS per VM? I heard that this was part of the early design but doesn't seem to be taken advantage of, as far as I know. In my changes for AS7-2076 (serialization of extended persistence context), I used a class variable, which would be shared between the multiple AS instances (if I don't change it). I could switch to using a service and lookup the service through CurrentServiceContainer.getServiceContainer().getService() but that also uses a class variable for tracking the current AS. The advantage of using CurrentServiceContainer.getServiceContainer(), is better encapsulation of code that needs to change, if we do run multiple AS instance per VM at some point. Scott