But Spring WebFlux: WebFilter tidak berfungsi

@restcontroller
@requestmapping("api/v1/test")
public class testcontroller {

    @postmapping
    public mono<string> getdraft() {
        return mono.just("ok");
    }

}

@Configuration
public class WebConfig {

    public static final String TRX_ID = "transactionId";
    public static final String PATH_URI = "pathUri";

    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    WebFilter slf4jMdcFilter() {
        return (exchange, chain) -> {
            System.out.println("Filtering request");
            String requestId = exchange.getRequest().getId();
            return chain.filter(exchange)
                    .contextWrite(Context.of(TRX_ID, requestId)
                            .put(PATH_URI, exchange.getRequest().getPath()));
        };
    }

}

@Component
public class YourFilter implements WebFilter {

  @Override
  public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
    return Mono.deferContextual(contextView -> chain.filter(exchange)
        .contextWrite(context -> context.put("KEY", "VALUE")));
  }
}

// controller
 @Override
  public Mono<String> testApi(ServerWebExchange exchange) {
    return Mono.just("OK")
        .transformDeferredContextual((data, context) -> {
          log.info("context is {}", (Object) context.get("KEY"));
          return data;
        });
  }