I sometimes use a single var containing an immutable model. Remember that
you don't have to worry about synchronization and locks, so multiple vars
may not be the end of the world.
I also use the become(state) technique.
Also look into the FSM trait.
http://doc.akka.io/docs/akka/snapshot/scala/fsm.html
On Mon, Aug 10, 2015 at 7:16 AM, <lalge...@gmail.com> wrote:
> Actors typcially required state that are var-declarations.; e.g., to hold
> a sum in an accumulator. What's the best way to do this without
> var-declarations?
>
> One that comes to mind is to keep 'becoming' a new behavior as shown
> below. Is this efficient? Is there a pattern to write the *receive *method
> without the auxillary *morph *method?
>
> Enter code here...
> class FunctionalActor(val sum: Int) extends Actor {
> def morph(sum: Int) : Receive = {
> case "inc" =>
> context.become(morph(sum+1))
> case "report" =>
> sender() ! sum
> context.become(morph(0))
> }
>
> def receive : Receive = morph(sum)
> }
>
> Thanks.
>
> Lal
>
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