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 val actorSystem = ActorSystem()
    val scheduler = actorSystem.scheduler
    val task = new Runnable { def run() { println("Hello") } }
    implicit val executor = actorSystem.dispatcher

    scheduler.schedule(
      initialDelay = Duration(5, TimeUnit.SECONDS),
      interval = Duration(10, TimeUnit.SECONDS),
      runnable = task)
      
      
//The above one , won't be useful if we want to schedule a job at a particular time. 
//It is useful if we schedule like 'run every 5 minutes.'

//So use this. 
// https://github.com/enragedginger/akka-quartz-scheduler

//build.sbt
"com.enragedginger" %% "akka-quartz-scheduler" % "1.6.0-akka-2.4.x"

//application.conf
akka {
  quartz {
    schedules {
      ValidationJob {
        description = "Runs daily to calculate the validation reports and email it"
        expression = "*/5 * * * * ?" //Cron job. Yes this is what I want.
      }
    }
  }
}

import java.util.concurrent.TimeUnit

import akka.actor.{Actor, ActorRef, ActorSystem, Props}
import com.typesafe.akka.extension.quartz.QuartzSchedulerExtension

class PrintActor extends Actor{ def receive = { case msg => println(msg) } }

val actorSystem = ActorSystem("MyActorSystem")
val actorRef: ActorRef = actorSystem.actorOf(Props[PrintActor], "Myactor")
val myScheduler = QuartzSchedulerExtension(actorSystem)
myScheduler.schedule("ValidationJob", actorRef, "This is the message coming from quartz...")