Spring Service method validation

It is considered a good practice to validate the inputs of your service method.

You need to first annotate your service class with @Validated. This annotation tells Spring to evaluate the constraints annotations on each method parameters.

	@Service
	@Transactional(readOnly = true)
	@Validated
	public class ClientProductServiceImpl implements ClientProductService {
	@Override
	@Transactional
	public ClientProduct save(Long sourceProductId, @Valid ClientProductDto clientProductDto) {...}
	}

view raw service_validation hosted with ❤ by GitHub

In order to avoid a ConstraintDeclarationException, your interface should also declare the constraint annotations.

	public interface ClientProductService {
	ClientProduct save(Long sourceProductId, @Valid ClientProductDto clientProductDto);
	}

view raw service_validation_interface hosted with ❤ by GitHub

If the input is invalid, a ConstraintViolationException is thrown.