public interface CustomerService
void
delete(int id)
List<Customer>
findAll()
Customer
findById(int id)
boolean
isFreeEmailCustomer(Customer customer)
register(Customer customer)
update(Customer customer)
List<Customer> findAll()
Customer findById(int id) throws DataNotFoundException
DataNotFoundException
Customer register(Customer customer)
void update(Customer customer) throws DataNotFoundException
void delete(int id) throws DataNotFoundException
boolean isFreeEmailCustomer(Customer customer)