akka mutable state change example

class MutableStateActor extends Actor {

var state = ...

override def preStart() =  {

//you can also use for yield/await.result here, it's fine...

state = ...

}

override def receive = {

case ... => updateState(newState)

//This is safe.The actor subsequent processing rule

case SetState(newState) => state = newState

}

def updateState(newState: State) = {

self ! SetState(newState)

}

}