This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
In the book which language is used for illustrate code samples. Is it Java or Erlang ?
Primarily Python, though there's a chapter on building plugins with Erlang. I believe the Python code to be straight forward enough that with the Tutorials on RabbitMQ.com, it'd be easy to draw the parallels between the example code and Java code doing the same thing.