Akka-Http：如何在请求中使用Actor？

Question

基于Akka-HTTP的简单代码：

val route =
    pathPrefix("myapp") {
      path("search") {
        get {
          //ref ! DoSomething("foo")
          complete(HttpEntity(ContentTypes.`application/json`, /* content here from an actor */ ))
        }
      }
    }

如何从Actor（sender ! content）返回值？

Answer 1

使用ask模式并映射它的回归未来。

import akka.pattern.ask    // enable `?`
import context.dispatcher  // Future's need an execution context, we use the Actor#context's one 

(ref ? DoSomething("foo")).mapTo[ReturningType].map { result =>
  complete(HttpEntity(ContentTypes.`application/json`, result ))
}