Recently I implemented ha singleton service and integrated it with Switchyard services using ha-singleton example from wildfly quickstarts. But I did it without deep understading how it all works inside. I am really interested in MSC and clustering themes and want to develop extensions and own modules on Wildfly and get deep knowledge about Jboss/Wildfly architecture. I tried to find more information about it, but I found only source code, msc state machine scheme and lonely ha singleton example. I agree that exploring sources is true way, but without knowing hot it would work "on paper" and without any specifications it's really difficult.
Can you please give me more information resources, maybe developer discussions about these themes, any hints. I would be very thankful. And sorry for my english