title: Binding AKKA actors to context
body: <p>Is it possible to bind a set of AKKA actors to a certain context? </p>
  
  <p>E.g. I have three actors and each of them are implementing a state machine. These actors send messages to each other on certain state transitions. Now I want to bind these state to a context, e.g. a user context. So I have a user (represented by an userId) who has a set of actors bound in certain states. As long as this user context exists these actors (or at least their states) must be bound to the user's context. Is this possible per se in AKKA or do I have to persist the state of the different actors user-wise? Or are actors not designed for these use cases?</p>