Run Spring WebFlux #Controller without Spring Boot - spring

Question

I'm trying to start Spring application from main without Spring Boot, I managed to get working router functions, but can't make to work classic #Controllers.
I debugged and watched source of boot and built in configs, added RequestMappingHandlerMapping, and it registers my Controller, but anyway WebHandler can not see it.
I can see that spring discovered my #Controller as a bean so it is not a problem.
Can someone help me? Thanx.
When I run the application I get:
Apr 13, 2018 7:27:30 PM
org.springframework.context.support.AbstractApplicationContext
prepareRefresh INFO: Refreshing
org.springframework.context.annotation.AnnotationConfigApplicationContext#20e2cbe0:
startup date [Fri Apr 13 19:27:30 EEST 2018]; root of context
hierarchy Apr 13, 2018 7:27:31 PM
org.springframework.web.reactive.result.method.AbstractHandlerMethodMapping$MappingRegistry
register INFO: Mapped "{[/test],methods=[GET]}" onto public
java.lang.String test.wboot.Controller.test() Apr 13, 2018 7:27:31 PM
org.springframework.web.reactive.result.method.AbstractHandlerMethodMapping$MappingRegistry
register INFO: Mapped "{[/test],methods=[GET]}" onto public
java.lang.String test.wboot.Controller.test() [DEBUG] (main) Using
Console logging [DEBUG] (main) Default Epoll support : false [DEBUG]
(main) Default KQueue support : false [DEBUG] (main) Connecting new
channel:
AbstractBootstrap$PendingRegistrationPromise#4a3329b9(incomplete)
Press button to exit
public class Application {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
context.start();
}
}
.
#Configuration
#ComponentScan("test.wboot")
public class AppConfig {
public static final int port = 9099;
#Bean
public NettyContext servak(ApplicationContext applicationContext) throws IOException {
// this handler works just perfect
// HttpHandler httpHandler = RouterFunctions.toHttpHandler(routingFunction());
// And this one can not see Controller
HttpHandler httpHandler = WebHttpHandlerBuilder.applicationContext(applicationContext).build();
ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(httpHandler);
NettyContext localhost = HttpServer.create("localhost", port).newHandler(adapter).block();
System.out.println("Press button to exit");
System.in.read();
return localhost;
}
public RouterFunction<ServerResponse> routingFunction() {
return nest(path("/test"), route(GET(""), new HandlerFunction<ServerResponse>() {
public Mono<ServerResponse> handle(ServerRequest request) {
return ServerResponse.ok().syncBody("Hello yopta");
}
}));
}
#Bean
public RequestMappingHandlerMapping requestMappingHandlerMapping(ApplicationContext applicationContext) {
RequestMappingHandlerMapping requestMappingHandlerMapping = new RequestMappingHandlerMapping();
requestMappingHandlerMapping.setApplicationContext(applicationContext);
requestMappingHandlerMapping.afterPropertiesSet();
return requestMappingHandlerMapping;
}
#Bean
public WebHandler webHandler(ApplicationContext applicationContext) {
DispatcherHandler webHandler = new DispatcherHandler();
webHandler.setApplicationContext(applicationContext);
return webHandler;
}
}
.
#RestController
#RequestMapping("/test")
public class Controller {
#GetMapping
public String test() {
return "work";
}
}
Maven dependencies:
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>io.projectreactor.ipc</groupId>
<artifactId>reactor-netty</artifactId>
<version>0.7.6.RELEASE</version>
</dependency>
</dependencies>

Answer 1

Why are you redifining everything?
Spring Framework provides an #EnableWebFlux annotation that does this and more, so you should just add that annotation on a #Configuration class.
You then just have to follow the instructions here to start your server using the WebHandler automatically created by the Framework; so for Reactor Netty, this would look like:
HttpHandler handler = ...
ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(handler);
HttpServer.create(host, port).newHandler(adapter).block();