ActorInstance.scala

@Singleton
class ActorInstance[T <: Actor] @Inject() (
    systemProvider: Provider[ActorSystem], builder: ActorBuilder, provider: Provider[T]) {
  lazy val ref: ActorRef = builder(systemProvider.get, provider)
}
 
@ImplementedBy(classOf[ActorBuilderImpl])
trait ActorBuilder {
  def apply(system: ActorSystem, provider: Provider[_ <: Actor]): ActorRef
}
 
class ActorBuilderImpl extends ActorBuilder {
  def apply(system: ActorSystem, provider: Provider[_ <: Actor]): ActorRef =
    system.actorOf(Props { provider.get })
}