sprejom simple-http-server príklad ako manipuluje viazaný správ?-scala, akka, sprej

Napríklad v serveri HTTP s rozprašovačom môžem pri spustení servera vidieť v protokole nejakú správu "Bound":

https://github.com/spray/spray/tree/master/examples/spray-can/simple-http-server/src/main

Pokúsim sa však vytvoriť svoj vlastný server a ignorovať ho Bound správa ich dostanem do mŕtvych písmen:

$ sbt run
[info] Set current project to pingpong (in build file:/D:/Projects/pingpong/)
[info] Updating {file:/D:/Projects/pingpong/}pingpong...
[info] Resolving jline#jline;2.12.1 ...
[info] Done updating.
[info] Running drozdyuk.pingpong.Main
[INFO] [08/03/2015 20:05:47.246] [default-akka.actor.default-dispatcher-2] [akka
://default/user/IO-HTTP/listener-0] Bound to localhost/127.0.0.1:8081
[INFO] [08/03/2015 20:05:47.246] [default-akka.actor.default-dispatcher-2] [akka
://default/deadLetters] Message [akka.io.Tcp$Bound] from Actor[akka://default/us
er/IO-HTTP/listener-0#-892116855] to Actor[akka://default/deadLetters] was not d
elivered. [1] dead letters encountered. This logging can be turned off or adjust
ed with configuration settings "akka.log-dead-letters" and "akka.log-dead-letter
s-during-shutdown".

Moja otázka je hlavne mimo zvedavosť, ako to robí Bound Správa sa spracuje v príklade? Je to nejaký druh záznamov, ktorý ich prehltne alebo niečo iné?

Kód pre mňa Main.scala:

package drozdyuk.pingpong

import akka.actor.{ActorSystem, Props}
import akka.io.IO
import spray.can.Http

object Main extends App {
implicit val system = ActorSystem()

// the handler actor replies to incoming HttpRequests
val handler = system.actorOf(Props[WebService], name = "handler")

val PORT = 8081
val DOMAIN = "localhost"
IO(Http) ! Http.Bind(handler, interface = DOMAIN, port = PORT)
}

a môj WebService.scala:

package drozdyuk.pingpong

import akka.actor._
import spray.http.HttpMethods.{GET}
import spray.can.Http
import spray.http.{HttpRequest, HttpResponse, Uri}

class WebService extends Actor with ActorLogging {
def receive = {
// New connection - register self as handler
case _: Http.Connected => sender ! Http.Register(self)

case HttpRequest(GET, Uri.Path("/ping"), _, _, _) =>
sender ! HttpResponse(entity = "pong")

case HttpRequest(GET, Uri.Path("/pong"), _, _, _) =>
sender ! HttpResponse(entity = "ping")


case _: HttpRequest => sender ! HttpResponse(status = 404, entity = "Unknown resource!")


}
}

odpovede:

6 pre odpoveď č. 1

Mohli by ste použiť inú verziu tell vo vašom Main:

IO(Http).tell(Http.Bind(handler, interface = DOMAIN, port = PORT), sender = handler)

A potom zvládnuť Bound správy vo vašej službe WebService:

class WebService extends Actor with ActorLogging {
def receive = {
case Http.Bound(address) =>
//all other cases...
}
}

Vo vašom prípade používate

def !(message: Any)(implicit sender: ActorRef = Actor.noSender): Unit

a neexistuje implicitný odosielateľ v rozsahu Main tak predvolené noSender bude použitý.

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0 pre odpoveď č. 2

Snažil som sa to a to pre mňa funguje skvele:

import akka.actor._
import akka.io._
import spray.can.Http
import spray.http.HttpResponse
import spray.http.HttpRequest
import spray.http.Uri
import spray.http.HttpMethods.{GET}

class WebService extends Actor with ActorLogging {
def receive = {
case _: Http.Connected => sender ! Http.Register(self)

case _: HttpRequest => sender ! HttpResponse(status = 404, entity =     "Unknown resource!")

case HttpRequest(GET, Uri.Path("/ping"), _, _, _) =>
sender ! HttpResponse(entity = "pong")

//all other cases...
}
}

object TestSpray extends App {
implicit val system = ActorSystem()
val myListener: ActorRef = system.actorOf(Props[WebService], name = "handler")
IO(Http) ! Http.Bind(myListener, interface = "localhost", port = 8080)
}

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