Custom Repositories

Repositores can be extended with custom code. This requires the following classes:

• Spring repository interface

• Custom repository interface

• Custom repository implementation

Model

Repository Interface

public interface EntityCustomRepository  {

   public Iterable<Entity> findByCustomQuery();

}

Custom Repository Interface

public interface EntityRepository extends JpaRepository<Entity, EntityKey> extends EntityCustomRepository {

}

Custom Repository Implementation

public class EntityCustomRepositoryImpl implements EntityCustomRepository   {

   public final Iterable<Entity> findByCustomQuery() {
      // Implementation
   }

}

Usage

Now calling the findByCustomQuery method in the repository will call the method in theDefautlEntityCustomRepository implementation. Spring will mix this code with the repository it generates.

public final class EntityService {

   @Autowired
   private EntityRepository repository;

   public final Iterable<Entity> getByCustomQuery(){
      return repository.findByCustomQuery();
   }

}