I might be wrong, but I don't think this information is available in AS7. I'll move this to the JBossWeb forum where someone with more knowledge in this area might be able to help.
Thanks for moving it.
It would be also useful to be able to query the current maximum of the request processing thread pool.
That way, I could monitor a large cluster of different JBoss 7 servers, and see how close each one gets towards the pool maximum, and emit notifications/warnings based on that.
This to me sounds like a very typical operations scenario, and I'm amazed this data seems not to be easily accessible.