在喷涂路由中异步执行一些逻辑 [英] Execute some logic asynchronously in spray routing

问题描述

这是我的简单路由应用程序：

  object Main通过SimpleRoutingApp {隐含
 
来扩展应用程序val system = ActorSystem（ my-system）
 
 startServer（interface = 0.0.0.0，port = System.getenv（ PORT）。toInt）{
 
导入格式。UsageJsonFormat._
导入spray.httpx.SprayJsonSupport._ 
 
 path（）{
 get {
 complete（ OK）
} 
}〜
 path（ meter / JavaUUID）{
 meterUUID => pathEnd {
 post {
实体（as [用法]）{
用法=> 
 //异步执行某些逻辑
 //不要等待结果
 complete（ OK）
} 
} 
} 
} 
} 
} 
  

我想要实现的是执行一些逻辑在我的path指令中异步执行，不要等待结果并立即返回HTTP 200 OK。

我对Scala还是很陌生，请喷雾并想知道是否有喷雾方式解决此特定问题。否则，我会转向为每个请求创建 Actor 并让它完成任务的方向。请指教。

解决方案

没有特殊的方式来处理此问题：只需触发您的异步操作即可（返回 Future ，发送给演员的消息，无论如何），然后立即调用 complete 。

  def doStuffAsync =未来{
 //实际上是任何东西
} 
 
 path（ meter / JavaUUID）{meterUUID => ; 
 pathEnd {
 post {
实体（as [用法]）{用法=> 
 doStuffAsync（）
 complete（ OK）
} 
} 
} 
} 
   
Here is my simple routing application:
object Main extends App with SimpleRoutingApp {

    implicit val system = ActorSystem("my-system")

    startServer(interface = "0.0.0.0", port = System.getenv("PORT").toInt) {

        import format.UsageJsonFormat._
        import spray.httpx.SprayJsonSupport._

        path("") {
            get {
                complete("OK")
            }
        } ~
            path("meter" / JavaUUID) {
                meterUUID => pathEnd {
                    post {
                        entity(as[Usage]) {
                            usage =>
                                // execute some logic asynchronously
                                // do not wait for the result
                                complete("OK")
                        }
                    }
                }
            }
    }
}
What I want to achieve is to execute some logic asynchronously in my path directive, do not wait for the result and return immediately HTTP 200 OK.

I am quite new to Scala and spray and wondering if there is any spray way to solve this specific problem. Otherwise I would go into direction of creating Actor for every request and letting it to do the job. Please advice.   
解决方案
There's no special way of handling this in spray: simply fire your async action (a method returning a Future, a message sent to an actor, whatever) and call complete right after.
def doStuffAsync = Future {
   // literally anything
}

path("meter" / JavaUUID) { meterUUID =>
  pathEnd {
    post {
      entity(as[Usage]) { usage =>
        doStuffAsync()
        complete("OK")
      }
    }
  }
}
Conversely, if you need to wait for an async action to complete before sending the response, you can use spray-specific directives for working with Futures or Actors.

                        
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