Using multiple WebSecurityConfigurerAdapter in spring boot

Define a special interface

public interface ServiceWebSecurityConfigurer {
    void configure(HttpSecurity http) throws Exception;
}

Then have just one ConfigurerAdapter:

public class MyConfigurerAdapter extends WebSecurityConfigurerAdapter {

    @Autowired(required = false)
    ServiceWebSecurityConfigurer serviceSecConfig;

    public void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests(). // whatever

        if (serviceSecConfig != null) serviceSecConfig.configure(http);

        http.authorizeRequests(). // whatever
    }
}

and then just implement ServiceWebSecurityConfigurer elsewhere when needed. There can be multiple implementations as well, just autowire them as list and iterate and use them all in your main configuration.

So one option I just found is:

1. Remove the @Configuration annotation from the first bean

And change the 2. to:

 @Configuration
 @EnableGlobalMethodSecurity(securedEnabled = true, prePostEnabled = true)
 @Order(SecurityProperties.ACCESS_OVERRIDE_ORDER)
 public class SecurityConfig extends BestSecurityConfig { //Note the changed extend !

     @Override
     protected void configure(HttpSecurity http) throws Exception {

         super.configure(http); // Merge of the 2 HTTP configurations

         http
             .csrf().disable()
             .authorizeRequests()
             .antMatchers("/testUrl").hasRole("NON_EXISTING")
             .anyRequest().authenticated();
     }
 }

Any comments on whether this is right or wrong approach much appreciated

Edit: After few years I still didn't find other way but I like this way more and more. Even in the default case you extend the abstract WebSecurityConfigurerAdapter there is no reason why some other layer of abstraction can't provide another abstract extension which provides meaningful defaults.