如何响应演员呼吁的结果？

本文介绍了如何响应演员呼吁的结果？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我们正在考虑使用Akka-HTTP Java API-使用路由DSL。

We are looking at using Akka-HTTP Java API - using Routing DSL.

目前尚不清楚如何使用路由功能来响应HttpRequest；使用无类型Akka演员。 例如，匹配路由路径后，我们如何将请求传递给处理程序 ActorRef，该处理程序随后将以异步方式通过HttpResponse进行响应？

It's not clear how to use the Routing functionality to respond to an HttpRequest; using an Untyped Akka Actor. For example, upon matching a Route path, how do we hand off the request to a "handler" ActorRef, which will then respond with a HttpResponse in a asynchronous way?

Akka-User邮件列表上张贴了类似的问题，但没有类似的后续解决方案- groups.google/d/msg/akka-user/qHe3Ko7EVvg/KC-aKz_o5aoJ 。

A similar question was posted on Akka-User mailing list, but with no followup solutions as such - groups.google/d/msg/akka-user/qHe3Ko7EVvg/KC-aKz_o5aoJ.

推荐答案

这可以通过 onComplete 指令和询问模式。

在下面的示例中， RequestHandlerActor actor用于基于 HttpReq创建 HttpResponse 西方。

In the below example the RequestHandlerActor actor is used to create a HttpResponse based on the HttpRequest. This Actor is asked from within the route.

我从来没有使用Java来路由代码，所以我的回答是在Scala中。

I have never used Java for routing code so my response is in Scala.

import scala.concurrent.duration._ import akka.actor.ActorSystem import akka.http.scaladsl.model.HttpResponse import akka.http.scaladsl.model.HttpRequest import akka.actor.Actor import akka.http.scaladsl.server.Directives._ import akka.actor.Props import akka.pattern.ask import akka.util.Timeout import scala.util.{Success, Failure} import akka.http.scaladsl.model.StatusCodes.InternalServerError class RequestHandlerActor extends Actor { override def receive = { case httpRequest : HttpRequest => sender() ! HttpResponse(entity = "actor responds nicely") } } implicit val actorSystem = ActorSystem() implicit val timeout = Timeout(5 seconds) val requestRef = actorSystem actorOf Props[RequestHandlerActor] val route = extractRequest { request => onComplete((requestRef ? request).mapTo[HttpResponse]) { case Success(response) => complete(response) case Failure(ex) => complete((InternalServerError, s"Actor not playing nice: ${ex.getMessage}")) } }

然后可以使用此路由传递到 bindAndHandle 方法，就像其他任何Flow一样。

This route can then be used passed into the bindAndHandle method like any other Flow.