How should I use @Cacheable on spring data repositories

Question

When using, for example, MongoRepository there are some methods which I would like to mark as @Cacheable such as insert(entity) or findOne(id). Since it's a Spring repository and not mine, how should I use @Cacheable on those methods?

Answer 1

Not sure how you're actually using MongoRepository, you seem to be suggesting you're using it directly (it's often a good idea to include your code in the question), but the reference documentation explains the basics of working with this interface (and all repository interfaces in Spring Data, as a matter of fact): "§ 6.1. Core concepts":

(...) This interface acts primarily as a marker interface to capture the types to work with and to help you to discover interfaces that extend this one. (...)

Your custom repository would be something like:

public interface SomeTypeMongoRepository extends MongoRepository<SomeType, Long> {
    @Override
    @CacheEvict("someCache")
    <S extends SomeType> S insert(S entity);

    @Override
    @Cacheable("someCache")
    SomeType findOne(Long id);
}

(note that it's based on the official example I included in one of my comments)