title: How to designate a thread pool for actors
body: <p>I have an existing java/scala application using a global thread pool.  I would like to start using actors in the project but would like everything in the app using the same pool.</p>
  
  <p>I know I can set the maximum number of threads that actors use but would prefer sharing the thread pool. Is this necessary/reasonable, and is it possible to designate the actor's thread pool?</p>
  
  <p>If it is not possible/recommended, are there any rules of thumb when integrating actors in apps that are already using threads?</p>
  
  <p>Thanks.</p>