I'm a newbie with Akka Streams so please excuse me if the question seems
stupid. I have the need to pass some context info along with the events in
a stream. For example, I have something like the following (doesn't
compile - just for illustration):
case class RequestFile(
req: HttpRequest,
fileId: Int,
fileName: String)
case class ResponseFile(
res: HttpResponse,
fileId: Int,
fileName: String)
val connection: Flow[HttpRequest, HttpResponse, Future[OutgoingConnection]]
= Http().outgoingConnection("api.mydomain.com")
val downloadFile: Flow[RequestFile, ResponseFile, Unit] =
Flow[RequestFile]
.map(_.req)
.via(connection)
.map { res => ResponseFile(res, ????, ????) } //here I don't know
how to reference the original RequestFile to get the fileId and fileName
Has anybody else dealt with this sort of issue?
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