How to add links to root resource in Spring Data REST?

Question

How to expose an external resource (not managed through a repository) in the root listing of resources of Spring Data REST? I defined a controller following

Answer 1

I have been searching for an answer to the same issue, but the key is: I don't have a controller. My url points to something created in an auth filter. What worked for me is to create a RootController that doesn't have any methods, and use it for building links in the ResourceProcessor implementation.

@RestController
@RequestMapping("/")
public class RootController {}

Then the link is inserted using the empty controller.

@Component
public class AuthLinkProcessor implements ResourceProcessor {

    @Override
    public RepositoryLinksResource process(RepositoryLinksResource resource) {
        resource.add(
                linkTo(RootController.class)
                .slash("auth/login")
                .withRel("auth-login"));
        return resource;
    }
}