1
Ich versuche, einen einfachen Http-Client mit Akka Http Client API zu schreiben. Auf dem Weg zu diesem Ich habe den folgenden Code geschriebenKonnte nicht auf den Typ Unmarshaller im Wert akka.http.javadsl.unmarshalling zugreifen
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.unmarshalling._
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.{Sink, Source}
import scala.concurrent.duration._
import scala.concurrent.{Await}
import akka.http.scaladsl.server.Directives
import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport
import spray.json._
final case class Post(postId: Int, id: Int, name: String, email: String, body: String)
trait JsonSupport extends SprayJsonSupport with DefaultJsonProtocol {
implicit val postFormat = jsonFormat5(Post.apply)
}
class AkkaHttpClient extends App with Directives with JsonSupport {
implicit val system = ActorSystem("my-Actor")
implicit val actorMaterializer = ActorMaterializer()
implicit val executionContext = system.dispatcher
val httpClient = Http().outgoingConnection(host="http://jsonplaceholder.typicode.com/")
val flow = Source.single(HttpRequest(uri = Uri("/comments/1")))
.via(httpClient)
.mapAsync(1)(r => Unmarshal(r.entity).to[Post])
.runWith(Sink.head)
val results = Await.result(flow, 15 seconds)
println(results)
}
Meine build.sbt Datei
name := "Akka-Http-Client"
version := "1.0"
scalaVersion := "2.11.8"
libraryDependencies ++= Seq(
"com.typesafe.akka" %% "akka-http-experimental" % "2.4.9-RC1",
"com.typesafe.akka" %% "akka-http-spray-json-experimental" % "2.4.9-RC1"
)
wie
sieht Wenn ich versuche, meinen Code ich diese FehlerError:scalac: missing or invalid dependency detected while loading class file 'Unmarshaller.class'.
Could not access type Unmarshaller in value akka.http.javadsl.unmarshalling,
because it (or its dependencies) are missing. Check your build definition for
missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
A full rebuild may help if 'Unmarshaller.class' was compiled against an incompatible version of akka.http.javadsl.unmarshalling.
danke. Das hat den Trick für mich gemacht. –