gistfile1.scala

package new_job

import scala.actors.{Actor}
import java.io.File
import scala.actors.Actor._

case class Job(folder: File, index: Int)

class MyScheduler(var jobs: List[Job]) extends Actor { 
  var done = List[Job]()
  var scheduled = List[Job]()
  
  def act() = loop { 
    receive { 
      case worker: Worker => next(worker)
      case (worker: Worker,job: Job) => { 
	println("Job is done : " + job)
	done = job :: done
	scheduled = scheduled - job
	next(worker)
      }
      case x => println(x)
    }
  }

  def next(worker: Actor) = if(jobs.isEmpty) { 
    worker ! "done"
    if(scheduled.isEmpty) { 
      println("All work is done " + done.length)
      exit()
    }
  } else { 
    val t_job = jobs.head
    jobs = jobs.tail
    scheduled = t_job :: scheduled
    worker ! t_job
  }
}

class Worker(val index: Int) extends Actor { 
  def act() = loop { 
    receive { 
      case "done" => exit()
      case job: Job => { 
	println("actor " + index + " starting job: " + job)
        Thread.sleep(0)
        reply((this, job))
      }
    }
  }
  start()
}

object App { 
  def main(args: Array[String]) = { 
    val jobs = Job(new File("."), 3) :: Job(new File("."), 4) :: Job(new File("."), 5) :: Job(new File("."), 333) :: Job(new File("."), 234) :: Nil
    
    val scheduler = new MyScheduler(jobs)
    scheduler.start()
    for(i <- 1 to 3) scheduler ! new Worker(i)
  }
}