Canceling a scheduled operation of the actor

By now, we know how to schedule the actor, but it is also necessary to cancel the scheduler if it has reached a certain condition. For this, we will have to maintain a state if the scheduler has run enough times to achieve the desired result.

Getting ready

Import the Hello-Akka project in the IDE; the other prerequisites are the same as earlier. 

How to do it…

1. Create a file, say, CancelOperation.scala, in the com.packt.chapter5 package.
2. Add the following import to the top of the file:

        import akka.actor.{Cancellable, Props, ActorSystem, Actor}
        import scala.concurrent.duration._

3. Define an actor, as follows. It will not compile, as it is referencing the Scheduler object:

        class CancelOperation extends Actor {
          var i = 10
          def receive = {
            case "tick" => {
              println(s"Hi, Do you know i do the same task again and 
              again")
              i = i - 1
              if (i == 0) Scheduler...