This:
final HttpServer server = vertx.createHttpServer();
final Flowable<HttpServerRequest> requestFlowable = server.requestStream().toFlowable();
or
that:
final Flowable<HttpServerRequest> requestFlowable = vertx.createHttpServer()
.requestStream().toFlowable();
I don't have a strong preference. #2 is more succinct, #1 perhaps slightly more readable.