Hello,
I’m struggling to understand how I can complete an akka-http RequestContext
asynchronously, using a future. Synchronously completion is
straightforward, e.g…...
val bundleRoutes = {
(pathPrefix("bundles") & get) {
path(Segment / "meta") {
bundleId => complete {
HttpResponse(entity = "Success!")
}
}
}
}
But I can’t find what API call I need in order to return a
Future[HttpResponse]. If I do the simplest change, returning a completed
future inside complete()…..
val bundleRoutesAsync = {
(pathPrefix("bundles") & get) {
path(Segment / "meta") {
bundleId => complete {
Future.successful(HttpResponse(entity = "Success!"))
}
}
}
}
…then the build fails with a type error (not necessarily too surprising).
type mismatch;
[error] found : scala.concurrent.Future[akka.http.model.HttpResponse]
[error] required: akka.http.marshalling.ToResponseMarshallable
[error] Future.successful(HttpResponse(entity = "Success!"))
I cannot see in the docs[1] what API I should use to achieve this.
Googling suggests that historically, with spray, using side-effecting
calls with onComplete/onFailure was the right approach — but that doesn’t
seem to be the case anymore. One thought was to return a
Future[RouteResult] myself, but the RouteResult docs suggest that I
shouldn’t be doing this.
I wonder if I’m missing an implicit marshaller that’ll handle the
Future[HttpResponse] responses.
Could someone point me in the right direction here, please?
—James
[1]
http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-M4/?_ga=1.53285288.1092433602.1423525300#akka.http.server.RequestContext
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