Estaba tratando de crear una API asíncrona. Pero la respuesta muestra ejecución secuencial. Pasos realizados: abre la url en dos pestañas de cromo. Y golpearlos uno tras otro rápidamente. url ex: -localhost:9000/getStar.

Pero el registro de ejecución es como: -

    [info] play - Listening for HTTP on /0:0:0:0:0:0:0:0:9000

(Server started, use Ctrl+D to stop and go back to the console...)

[success] Compiled in 107ms
[info] application - Application has started
[info] play - Application started (Dev)
[info] application - Async started ************************** :tarun
[info] application - Success Async call  :1
[info] application - Success Async call  :2
[info] application - Success Async call  :3
[info] application - Success Async call  :4
[info] application - Success Async call  :5
[info] application - Success Async call  :6
[info] application - Success Async call  :7
[info] application - Success Async call  :8
[info] application - Success Async call  :9
[info] application - Async finished ************************** :tarun
[info] application - Async started ************************** :tarun1
[info] application - Success Async call  :1
[info] application - Success Async call  :2
[info] application - Success Async call  :3
[info] application - Success Async call  :4
[info] application - Success Async call  :5
[info] application - Success Async call  :6
[info] application - Success Async call  :7
[info] application - Success Async call  :8
[info] application - Success Async call  :9
[info] application - Async finished ************************** :tarun1

El código para esto es:

package controllers

import play.Logger
import play.api.libs.json.Json
import play.api.mvc._


import scala.concurrent.Future

object StarController extends Controller {
  import play.api.libs.concurrent.Execution.Implicits.defaultContext


  def getStarAsync(name : String) = Action.async{
    val futureResult = Future{
      Logger.info("Async started ************************** :" + name)
      val a = 0;
      for( a <- 1 until 10) {
        Thread.sleep(1000)
        Logger.info("Success Async call  :" + a.toString)
      }
      Logger.info("Async finished ************************** :" + name)
      Map("success" -> Json.toJson(true), "msg" -> Json.toJson("Success Async by :" + name), "code" -> Json.toJson(200))
    }

    futureResult.map{ result =>
      Ok(Json.toJson(result))
    }
  }

}

¿Alguien puede ayudarme a entender por qué la ejecución de la secuencia fue secuencial incluso con una llamada asincrónica?