I am trying to figure out what is the JBoss 7 "native" component model, the equivalent of MBeans for JBoss 4 and Microcontainer services for JBoss 5. How one should package functionality to get lifecycle, dependency enforcement and configuration services from a JBoss 7 instance? How such a service would interact with existing infrastructure services" - how would it get traffic statistics from a JBoss Web connector, for example? JMX?
for as7 that would be MSC for services +DMR management.
fastest way to getting into that is by creating extension https://docs.jboss.org/author/display/AS71/Extending+JBoss+AS+7
As Ales said there is still POJO support in as7 but it is not core thing but just one of the subsystems (extensions).
I would recommend you to join #jboss-as7 where most of developers hang to help you explain understand what and how things are done.
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