How to Override the Default Save Method in Spring Data?

Is it possible to override the default generated save method in Spring Data? If so, how can I achieve that?

@Override
public <S extends T> S save(S entity) {
    // Custom logic before saving
    return super.save(entity);
}

In Spring Data, the default save method provided by repositories can indeed be overridden to implement custom behavior or validations. This can be particularly useful when you need to add pre-processing logic before persisting your entities.

import org.springframework.data.jpa.repository.JpaRepository;

public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {
    @Override
    <S extends MyEntity> S save(S entity);
}

@Service
public class MyEntityRepositoryImpl implements MyEntityRepository {
    @Override
    public <S extends MyEntity> S save(S entity) {
        // Add custom pre-save logic here
        return JpaRepository.super.save(entity);
    }
}

Causes

• Understanding the repository pattern in Spring Data.
• Recognizing when you need to customize the persistence logic.

Solutions

• Create a custom repository interface that extends the default repository.
• Implement this custom interface in a concrete class where the save method is overridden.

Mistake: Not using the correct interface for custom repository implementation.

Solution: Ensure your custom repository extends the correct Spring Data repository interface.

Mistake: Attempting to override save method in a service layer instead of the repository.

Solution: Override the method in the repository interface to maintain persistence context.