我正在使用akka-http 1.0,我想使用定义为
的路由def route: Route = path("") {
// start actor with requestContext
// call requestContext.complete(...) in actor with the result
}
我如何做到这一点?
答案 0 :(得分:8)
阐述@jrudolph的注释,下面的代码满足了将RequestContext值分配给Actor的要求。您的问题表明您希望每个请求都有一个新的Actor;但是,下面的代码对所有请求使用相同的Actor,我认为这是一个更有效/可能的用例。如果需要,可以随时在handleRequest内移动Actor创建。
首先,我们需要一个Actor来处理对响应的请求:
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
现在创建一个用于查询Actor的实用程序函数:
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]
}
剩下要做的就是将所有内容连接成一个服务:
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
答案 1 :(得分:2)
你可能会尝试更好:
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)
}