我使用时如何完成其他演员的要求阿卡-HTTP 1.0,我想用定义为用阿卡-HTTP
def route: Route = path("") {
// start actor with requestContext
// call requestContext.complete(...) in actor with the result
}
如何做到这一点的路线?
我使用时如何完成其他演员的要求阿卡-HTTP 1.0,我想用定义为用阿卡-HTTP
def route: Route = path("") {
// start actor with requestContext
// call requestContext.complete(...) in actor with the result
}
如何做到这一点的路线?
对@ jrudolph的评论进行了详细阐述,下面的代码满足您将RequestContext值分配给Actor的要求。你的问题表明你想为每个请求提供一个新的Actor;然而,下面的代码对所有请求都使用相同的Actor,我认为这是更高效/可能的用例。如果需要,Actor创建可以始终在handleRequest内移动。
首先,我们需要一个演员,用于处理对响应的请求:
import akka.actor.Actor
import akka.http.scaladsl.server.{RequestContext, RouteResult}
import akka.http.scaladsl.model.HttpResponse
class RequestActor extends Actor {
//business logic - returns empty HttpResponse
def handleRequestMessage(requestContext : RequestContext) =
RouteResult.Complete(new HttpResponse())
override def receive = {
case reqContext : RequestContext =>
sender ! handleRequestMessage(reqContext)
}
}//end class RequestActor
现在用于查询演员创造一个效用函数:
import akka.actor.ActorRef
import scala.concurrent.Future
import akka.pattern.ask
object RequestActor {
val handleRequest : ActorRef => RequestContext => Future[RouteResult] =
(actorRef) =>
(requestContext) =>
ask(actorRef,reqContext).mapTo[RouteResult]
}
而所有剩下要做的就是线一切变成服务:
import akka.actor.{ActorSystem, Props}
import akka.stream.ActorMaterializer
import akka.http.scaladsl.Http
import akka.http.scaladsl.server.Directives.{get,path}
import akka.util.Timeout
object RouteActorTest extends App {
implicit val as = ActorSystem("RouteActorTest")
implicit val timeout = new Timeout(1000)
val sendRequestToActor : RequestContext => Future[RouteResult] =
RequestActor handleRequest (as actorOf Props[RequestActor])
val route = path("")(get(sendRequestToActor))
//rest of application...
}//end object RouteActorTest
你可能会尝试更好,如:
package controllers
import akka.actor.{Actor, ActorSystem, Props}
import akka.stream.ActorMaterializer
import scala.concurrent.{Await, Future}
import akka.http.scaladsl.server.Directives._
import akka.stream.ActorMaterializer
import akka.util.Timeout
import akka.pattern.ask
import scala.concurrent.Await
import scala.concurrent.duration._
import scala.io.StdIn
import akka.actor._
import akka.util.Timeout
case object Message
class TestActor(name:String) extends Actor {
def receive = {
case Message =>
sender ! "Testing Ask pattern Approach"
println(s"hello from $name")
case _ =>
println("that was unexpected")
}
}
object AskTest extends App {
implicit val system= ActorSystem("myactor")
implicit val material=ActorMaterializer()
// implicit val props=Props.empty
implicit val timeout = Timeout(5 seconds)
implicit val result =system.actorOf(Props(new TestActor("TestingName")),name = "Scala")
val future3:Future[String]= ask(result ,Message).mapTo[String]
val results = Await.result(future3, 2 seconds)
println(results)
}
akka-http的路由完全是基于Future的,即'Route'是'RequestContext => Future [RouteResult]'的类型别名。所以,无论如何你需要立即返回一个'Future [RouteResult]'。为了与演员互动,通常通过使用akka ask模式将消息发送给处理参与者并立即获得Future值,从而完成请求。 – jrudolph