Question

我正在研究一个带有spark的简单喷雾REST应用程序，我有以下代码（从spray-template生成）。我将其修改为包含json支持和一些返回业务列表的推荐程序。由于某种原因，即使我将timeout参数指定为无限，请求也会超时。谁能告诉我我做错了什么？看起来我采用了错误的技术选择，而论坛中的支持则非常少。推荐程序在后台运行，但服务器立即返回到客户端并发出超时错误。我玩了很多配置值，但似乎仍然不喜欢它。任何帮助是极大的赞赏。

case class Business(name:String)
object MyProtocol extends DefaultJsonProtocol with SprayJsonSupport{
  implicit val elementFormat = jsonFormat1(Business)
}

trait MyService extends HttpService {
import MyProtocol._ 

val myRoute = {

      path("") {
        get {
          respondWithMediaType(`application/json`) {
            complete(Recommender.recommend(1000)) // times out 
            complete('some html') // works immediately 
          }
   }
}

def Recommend(userId: Int) : List[Business] = {
  ......................
}

application.conf 

spray.can {
    server {
     request-timeout = infinite
    }
}

Answer 1

尝试：

// In some file, define yopur model
case class Business(name: String, age: Int)
object MyProtocol extends DefaultJsonProtocol with SprayJsonSupport{
  implicit val elementFormat = jsonFormat2(Business)
}

// In other file
trait MyService extends HttpService {
  import MyProtocol._ 

  val myRoutes = {
    path("sthnotverytimeconsuming") {
      get {
        complete {
          doRequest()
        }
      }
    } ~
    path("sthverytimeconsuming") {
      get {
        complete {
          doTimeConsumingRequest()
        }
      }
    }
  }

  private def doRequest(): Future[List[Business]] = {
    Future{
      val result : List[Business] = // ... do something that take times but not very long
      result
    }
  }

  private def doTimeConsumingRequest(): Future[List[Business]] = {
    Future{
      // ... you can do something that take a long time here
    }
    val result : List[Business] = //...
    result //... this will return immediately
  }
}

服务器请求使用Spray超时

1 个答案: