Spring Add general HttpHandlers to adapt Servlet runtimes

In webflux world, it is easy to create a HttpHandler adapter to connect the underlay Web server, thus it is easy to start up an embedded web server based application without Spring Boot, eg.

@Bean
@Profile("default")
public HttpServer httpServer(ApplicationContext context) {
    HttpHandler handler = WebHttpHandlerBuilder.applicationContext(context).build();
    ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(handler);
    return HttpServer.create()
            .host("localhost")
            .port(this.port)
            .handle(adapter);
}

If possible providing such an API to simplify the Servlet stack, hide the configuration of WebApplicationInitializer, and allow developer create an embedded server programmatically to serve the application and package the application in a jar package.

Comment From: rstoyanchev

HttpHandler does not remove the need to use WebApplicationInitializer. It abstracts only the handling of an HTTP request but you still need to deploy it accordingly. In the case of Servlet containers, HttpHandler is adapted to a Servlet, which you then need to deploy in all the usual ways.

Comment From: hantsy

@rstoyanchev I think you mistook my meanings. What I expected is creating(or porting) the existing webflux HttpHandler and HttpHandlerAdapter equivalent APIs for Servlet stack (and simplify/hide the config of WebApplicationInitializer for DispatchServlet).