extractActorSystem
Description
Extracts the ActorSystem from the RequestContext, which can be useful when the external API
in your route needs one.
警告
This is only supported when the available Materializer is an ActorMaterializer.
Example
final Route route = extractActorSystem(actorSystem ->
  complete("Actor System extracted, hash=" + actorSystem.hashCode())
);
// tests:
testRoute(route).run(HttpRequest.GET("/"))
  .assertEntity("Actor System extracted, hash=" + system().hashCode());
Contents

