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Akka:Http:RoutingDSL

Akka HTTP provides a flexible routing DSL for elegantly defining RESTful web services. It picks up where the low-level API leaves off and offers much of the higher-level functionality of typical web servers or frameworks, like deconstruction of URIs, content negotiation or static content serving.

Dynamic Routing Example 

case class MockDefinition(path: String, requests: Seq[JsValue], responses: Seq[JsValue])
implicit val format = jsonFormat3(MockDefinition)

@volatile var state = Map.empty[String, Map[JsValue, JsValue]]

// fixed route to update state
val fixedRoute: Route = post {
  pathSingleSlash {
    entity(as[MockDefinition]) { mock =>
      val mapping = mock.requests.zip(mock.responses).toMap
      state = state + (mock.path -> mapping)
      complete("ok")
    }
  }
}

// dynamic routing based on current state
val dynamicRoute: Route = ctx => {
  val routes = state.map {
    case (segment, responses) =>
      post {
        path(segment) {
          entity(as[JsValue]) { input =>
            complete(responses.get(input))
          }
        }
      }
  }
  concat(routes.toList: _*)(ctx)
}

val route = fixedRoute ~ dynamicRoute

See also

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