who calls subscribe on Flux or Mono in reactive webapplication

Question

I am looking at some examples of reactive web applications and i am seeing them like this

@RequestMapping(value = \"/{id}\", method = RequestMethod.GET)
@Res         


        

Answer 1

It depends on which server you use.

For instance, Tomcat, Jetty (Servlet 3.1 non-blocking I/O) - ServletHttpHandlerAdapter from org.springframework.http.server.reactive package.

Subscription happens in service method:

@Override
public void service(ServletRequest request, ServletResponse response) throws 
  ServletException, IOException {        
    ...
    HandlerResultSubscriber subscriber = new HandlerResultSubscriber(asyncContext, 
        isCompleted, httpRequest);
    this.httpHandler.handle(httpRequest, httpResponse).subscribe(subscriber);
}