Creating a read-only repository with SpringData

Yes, the way to go is to add a handcrafted base repository. You usually use something like this:

public interface ReadOnlyRepository<T, ID extends Serializable> extends Repository<T, ID> {

  T findOne(ID id);

  Iterable<T> findAll();
}

You can now have you concrete repos extend that just defined one:

public interface PersonRepository extends ReadOnlyRepository<Person, Long> {

  T findByEmailAddress(String emailAddress);
}

The crucial part defining the base repo is that the method declarations carry the very same signature as the methods declared in CrudRepository if that’s the case we can still route the calls into the implementation bean backing the repository proxy. I’ve written a more detailed blog post about that topic in the SpringSource blog.