喷雾路线得到儿童演员的响应

Question

object Boot extends App {

  // we need an ActorSystem to host our application in
  implicit val system = ActorSystem("on-spray-can")

  // create and start our service actor
  val service = system.actorOf(Props[DemoServiceActor], "demo-service")

  implicit val timeout = Timeout(5.seconds)
  // start a new HTTP server on port 8080 with our service actor as the handler
  IO(Http) ? Http.Bind(service, interface = "localhost", port = 8080)
}

class DemoServiceActor extends Actor with Api {

  // the HttpService trait defines only one abstract member, which
  // connects the services environment to the enclosing actor or test
  def actorRefFactory = context

  // this actor only runs our route, but you could add
  // other things here, like request stream processing
  // or timeout handling
  def receive = handleTimeouts orElse runRoute(route)

  //Used to watch for request timeouts
  //http://spray.io/documentation/1.1.2/spray-routing/key-concepts/timeout-handling/
  def handleTimeouts: Receive = {
    case Timedout(x: HttpRequest) =>
      sender ! HttpResponse(StatusCodes.InternalServerError, "Too late")
  }


}

//Master trait for handling large APIs
//http://stackoverflow.com/questions/14653526/can-spray-io-routes-be-split-into-multiple-controllers
trait Api extends DemoService {
  val route = {
    messageApiRouting
  }
}

示范喷洒服务（路线）：

trait DemoService extends HttpService with Actor  {
  implicit val timeout = Timeout(5 seconds) // needed for `?` below
  val redisActor = context.actorOf(Props[RedisActor], "redisactor")

  val messageApiRouting =
        path("summary" / Segment / Segment) { (dataset, timeslice) =>
          onComplete(getSummary(redisActor, dataset, timeslice)) {
            case Success(value) => complete(s"The result was $value")
            case Failure(ex) => complete(s"An error occurred: ${ex.getMessage}")
          }
        }

  def getSummary(redisActor: ActorRef, dataset: String, timeslice: String): Future[String] = Future {

    val dbMessage = DbMessage("summary", dataset + timeslice)
    val future = redisActor ? dbMessage
    val result = Await.result(future, timeout.duration).asInstanceOf[String]
    result
  }

}

Redis执行元（Mock还没有实际的Redis客户端）

class RedisActor extends Actor with ActorLogging {
  //  val pool = REDIS
  implicit val timeout = Timeout(5 seconds) // needed for `?` below
  val summaryActor = context.actorOf(Props[SummaryActor], "summaryactor")


  def receive = {

    case msg: DbMessage => {
      msg.query match {
        case "summary" => {
          log.debug("Summary Query Request")
          log.debug(sender.path.toString)
           summaryActor ! msg
        }
      }
    }

    //If not match log an error
    case _ => log.error("Received unknown message: {} ")
  }
}

class SummaryActor extends Actor with ActorLogging{

  def receive = {
    case msg: DbMessage =>{
      log.debug("Summary Actor Received Message")
      //Send back to Spray Route

    }
  }
}

Answer 1

代码的第一个问题是，您需要从主执行元转发到子执行元，以便发送者能够正确传播，并可供子执行元响应。因此更改此内容（在redisactor中）：

summaryActor ! msg

致：

summaryActor forward msg

这是首要问题。修复它，您的代码就应该开始工作了。不过，还有一些事情需要注意。您的getsummary方法当前定义为：

def getSummary(redisActor: ActorRef, dataset: String, timeslice: String): Future[String] = 
  Future {
    val dbMessage = DbMessage("summary", dataset + timeslice)
    val future = redisActor ? dbMessage
    val result = Await.result(future, timeout.duration).asInstanceOf[String]
    result
  }

def getSummary(redisActor: ActorRef, dataset: String, timeslice: String): Future[String] = {
  val dbMessage = DbMessage("summary", dataset + timeslice)
  (redisActor ? dbMessage).mapTo[String]      
}