RSocket Functional route & Kotlin DSL

Now functional route is useful feature for Spring WebFlux and SpringMVC, and it's possible to add this feature for RSocket? Functional route is very convenient with functional style, especially for Kotlin, and all are functions and messages/events.

    @Bean
    public RouterFunction locateRoutes() {
        return RouterFunctions
                .route(RPC("findId"), payload -> Mono.just(DefaultPayload.create("hello")))
                .andRoute(FIRE("notifyLogin"), payload -> Mono.empty())
                .andRoute(STREAM("accounts"), payload -> Flux.empty());
    }

Two hard things: MessageMapping and payload data serialization. I like following style, and it's very useful sometimes.

    @MessageMapping("users.{user}.info")
    Mono<ChatUserInfo> getUserInfo(@DestinationVariable String user, Body body) {
        // ...
    }

Start by reviewing the existing RSocket support and how functional routes are implemented for Spring WebFlux and Spring MVC. Define the scope for RSocket functional routing, Kotlin DSL support, MessageMapping-style destinations, and payload data serialization; done requires an agreed design and corresponding coverage for the proposed behavior.