Cannot extend WebMvcAutoConfigurationAdapter in Spring Boot 1.4

Question

I'd like to update a web project to Spring Boot 1.4 but I'm getting and error.

I'm currently using Spring Boot 1.3.3 and I'm extending WebMvcAutoConfigurationAdapter to map some custom resource hanlders:

@Configuration
public class MvcConfiguration extends WebMvcAutoConfigurationAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        super.addResourceHandlers(registry);
        registry.addResourceHandler("/images/users/**").addResourceLocations("http://file-storage/images/users/");
        // ...

}

I noticed that in the new version of SB a constructor was added to WebMvcAutoConfigurationAdapter:

public WebMvcAutoConfigurationAdapter(ResourceProperties resourceProperties,
        WebMvcProperties mvcProperties, ListableBeanFactory beanFactory,
        HttpMessageConverters messageConverters,
        ObjectProvider<ResourceHandlerRegistrationCustomizer> resourceHandlerRegistrationCustomizerProvider) {} 

and this constructor uses ResourceHandlerRegistrationCustomizer that is a package-protected interface, so, basically, from version 1.4 is not possible to extend autoconfiguration.

What is an alternative way to extend autoconfiguration?

Answer 1

There's no need to extend WebMvcAutoConfigurationAdapter to add some custom resource handlers (and never has been). You should extend Spring MVC's WebMvcConfigurerAdapter instead.