title: How to organize the code with actor pattern
body: <p>I'm converting a java application to Akka in order to learn about actor pattern. </p>
  
  <p>Let's say that I have the three usual layers (application, domain, infrastructure). My domain layer has some aggregates, like User, Car, ...</p>
  
  <p><strong>Question:</strong>
  Because these aggregates has mutable state, should i convert these aggregates to actors?, they have mutable state and seems that actors are a solution that fits to this.</p>