AuthenticationManager

public class SecurityConfig extends WebSecurityConfigurerAdapter {

    ...
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Bean
    public FilterSecurityInterceptor customFilterSecurityInterceptor() throws Exception {

        FilterSecurityInterceptor filterSecurityInterceptor = new FilterSecurityInterceptor();
        ...                 
        filterSecurityInterceptor.setAuthenticationManager(authenticationManagerBean());
        return filterSecurityInterceptor;
    }

}

1. 위 방식으로 AuthenticationManager 를 받아 와서 사용하셨는데,
   authenticationManagerBean() 는 단순히 AuthenticationManager 빈을 반환한다고 이해하면 되나요?
   

2. WebSecurityConfigurerAdapter 를 사용할 수 없는 5.7 이후 버전에 맞추어 구현한 아래 authenticationManager(HttpSecurity http) 를 사용해도 문제 없을까요?

public class SecurityConfig {

    @Bean
    public AuthenticationManager authenticationManager(HttpSecurity http) throws Exception {
        AuthenticationManagerBuilder authenticationManagerBuilder =
                http.getSharedObject(AuthenticationManagerBuilder.class);
        authenticationManagerBuilder.authenticationProvider(authenticationProvider);
        return authenticationManagerBuilder.build();
    }


    @Bean
    public FilterSecurityInterceptor customFilterSecurityInterceptor(HttpSecurity http) throws Exception {
        FilterSecurityInterceptor filterSecurityInterceptor = new FilterSecurityInterceptor();
        ...
        filterSecurityInterceptor.setAuthenticationManager(authenticationManager(http));
        return filterSecurityInterceptor;
    }

}

@Bean
public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
    ProviderManager authenticationManager = (ProviderManager)authenticationConfiguration.getAuthenticationManager();
    authenticationManager.getProviders().add(authenticationProvider)
    return authenticationManager;
}