extractMaterializer
Description
Extracts the MaterializerMaterializer from the RequestContextRequestContext, which can be useful when you want to run an Akka Stream directly in your route.
See also withMaterializer to see how to customise the used materializer for specific inner routes.
Example
- Scala
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val route = path("sample") { extractMaterializer { materializer => complete { // explicitly use the `materializer`: Source.single(s"Materialized by ${materializer.##}!") .runWith(Sink.head)(materializer) } } } // default materializer will be used // tests: Get("/sample") ~> route ~> check { responseAs[String] shouldEqual s"Materialized by ${materializer.##}!" }
- Java
-
final Route route = path("sample", () -> extractMaterializer(mat -> onSuccess(() -> // explicitly use the materializer: Source.single("Materialized by " + mat.hashCode() + "!") .runWith(Sink.head(), mat), this::complete ) ) ); // default materializer will be used testRoute(route).run(HttpRequest.GET("/sample")) .assertEntity("Materialized by " + materializer().hashCode()+ "!");