java - What Does MapReactiveUserDetailsService Do in Spring Webflux Security Authentication?

Question

I'm trying to implement Spring Security authentication on Spring WebFlux app. I have implemented Spring Security authentication on Spring Web before.

When I read articles on how to implement it, I saw MapReactiveUserDetailsService bean but there is no explanation about this bean usage. I read the article from here and here.

the bean looks like this:

@Bean
public MapReactiveUserDetailsService userDetailsService() {
    UserDetails user = User
      .withUsername("user")
      .password(passwordEncoder().encode("password"))
      .roles("USER")
      .build();
    return new MapReactiveUserDetailsService(user);
}

is there anyone know what it does?

标签： javaspring-bootspring-securityspring-webflux