How can I better monitor my Dropwizard threads/request queue via a Metric registry?

[JohnLKramer]

So I have this dropwizard application with all of the standard config yaml stuff like:

server:
  maxQueuedRequests: 256
  maxThreads: 256

I'd like to instrument this thread info. I.e. I'd like to know how many requests are queued and how many threads are dedicated to serving requests. Are these metrics automatically pushed or do I need to addd some custom metrics? If I need to add some custom metrics, how do I get access to the thread pool and the request queue?

BTW, I'm using DW 1.3.18. I can maybe upgrade if necessary but not sure about that.

Thanks!