Hi, 

I am using Spray client within tomcat. I am wondering if any one has ever 
faced this situation. I need to shutdown my spray client when tomcat is 
shutdown. However the classic shutdown hook as in 


Runtime.getRuntime().addShutdownHook(new Thread() {

  override def run() {
    println("shutting down spray")
    IO(Http) ! Http.CloseAll
    IO(Http) ! PoisonPill
    system.shutdown();
  }
})



Does not work. 

I introduce it in my service that actually to rest call to other service 
that are external from within a tomcat webapp


case class PClassificationService(name: String) extends ClassificationService {


  implicit val requestTimeout = Timeout(800 seconds)
  implicit val system         = ActorSystem("simple-spray-client")


  /*Runtime.getRuntime().addShutdownHook(new Thread() {

    override def run() {
      println("shutting down spray")
      IO(Http) ! Http.CloseAll
      IO(Http) ! PoisonPill
      system.shutdown();
    }
  })*/


......

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