CoroutineVertxRoute.kt

fun Route.coHandler(controller: suspend RoutingContext.() -> ServerResponse): Route =
		handler {
			launch(it.vertx().dispatcher()) {
				val response = it.controller()

				when (response) {
					is ServerResponse.Empty ->
						it.response().end()

					is ServerResponse.Json ->
						it.response()
								.putHeader("content-type", "application/json; charset=utf-8")
								.end(response.jsonString)
					is ServerResponse.Error ->
						it.response().apply {
							statusCode = response.statusCode
							statusMessage = response.message

							LoggerFactory.getLogger("Response dispatcher").info(statusMessage, response.exception)
						}
						.putHeader("content-type", "application/json; charset=utf-8")
						.end(response.message)
				}
			}
		}

sealed class ServerResponse {
	object Empty : ServerResponse()

	data class Error(val statusCode: Int, val message: String, val exception: Exception? = null) : ServerResponse()

	data class Json(val jsonObj: Any) : ServerResponse() {
		val jsonString: String
			get() = Klaxon().toJsonString(jsonObj)
	}
}