Scheduling an operation at a specified interval 

There are some situations where we want an operation to occur at a specified time or occur repeatedly after an interval. This is like a cron job. Let's go through the recipe.

Getting ready

To step through this recipe, we need to import our Hello-Akka project into the IDE and create a com.packt.chapter5 package in which we will put all the code.

How to do it…

1. Let's create a file, say, ScheduleOperation.scala in the com.packt.chapter5 package.
2. Add the following imports to the top of the file:

        import akka.actor.ActorSystem
        import scala.concurrent.duration._

3. Create a test application, as follows, in which we create an actor system and schedule the operation:

         object ScheduleOperation extends App {
         val system = ActorSystem("Hello-Akka")
         import system.dispatcher
         system.scheduler.scheduleOnce(10 seconds)
           { println(s"Sum of (1 + 2) is ${1 + 2}")
           }
         system.scheduler.schedule(11...