Ted, Akka is a damn Scala library. Yeah yeah, I know you can fit it into your Java project if you really want to, but damn, you just end up with ugly Java syntax that tries and fails to be Scala. Just bloody well use Scala. Or use something more Java-esque like reactor if you *really* want to do async stuff and stay in Java land. But please, please don't use Akka in Java. The thing is a mess. I know it's asynchronous which in fairness does help in this application, but seriously just....

Wait... hang on... WHAT?! You're using the whole thing in an asynchronous reactive chain then just calling join() on everything?! What do you mean it's "mostly asynchronous but just blocks at the end?!?!" Do you like watching people suffer for no purpose, Ted? Do you?