How to auto scale Heroku Java dns?

I am prototyping a cloud backend using Java that consists of web and work speakers (RESTful service). Now that I'm close to finishing, I'm wondering if there is an automatic scanner for the web and work speakers. I see there are HireFire and Hero Scale, but they target Ruby, running on Sinatra or Rails.

For working speakers, I think I can try and figure out the queue throughput (I'm using AMQP RabbitMQ) and scale accordingly, but I'm a little unsure how to scale the web dino (Jersey to Jetty via Grizzly). Is there a way to look at the average HTTP response time across all requests across all web dinons?

Thanks for any ideas!