我现在正在玩akka streams，并尝试了以下示例。
当请求某个http端点时，从kafka获取第一个元素。这是我写的代码和它的工作。

get {
      path("ticket" / IntNumber) { ticketNr =>

        val future = Consumer.plainSource(consumerSettings, Subscriptions.topics("tickets"))
          .take(1)
          .completionTimeout(5 seconds)
          .runWith(Sink.head)

        onComplete(future) {
          case Success(record) => complete(HttpEntity(ContentTypes.`text/html(UTF-8)`, record.value()))
          case _ => complete(HttpResponse(StatusCodes.NotFound))
        }
      }
    }

我只是想知道，这是否是一种意识形态的方式来处理（阿克卡）流。那么，有没有更“直接”的方式将kafka流连接到http响应流呢？
例如，发布时我会这样做：

val kafkaTicketsSink = Flow[String]
    .map(new ProducerRecord[Array[Byte], String]("tickets", _))
    .toMat(Producer.plainSink(producerSettings))(Keep.right)    

post {
          path("ticket") {
            (entity(as[Ticket]) & extractMaterializer) { (ticket, mat) => {
                val f = Source.single(ticket).map(t => t.description).runWith(kafkaTicketsSink)(mat)
                onComplete(f) { _ =>
                  val locationHeader = headers.Location(s"/ticket/${ticket.id}")
                  complete(HttpResponse(StatusCodes.Created, headers = List(locationHeader)))
                }
              }
            }
          }
        }

也许这也可以改进？？