4th version ReservationService - with @Cacheable

ReservationService4.java

@Service
public class ReservationService {
	
	private ReservationRepository reservationRepository;
	
	public ReservationService(ReservationRepository reservationRepository) {
		this.reservationRepository = reservationRepository;
	}

	@Cacheable("reservation")
	public Reservation getReservationDetails(String name) {
		System.out.println("Entering and leaving ReservationService : getReservationDetails "
				+ "after calling reservationRepository.findByFirstName");
		Reservation aReservation = reservationRepository.findByFirstName(name);
		if (aReservation == null) {
			throw new ReservationNotFoundException();
		}
		return aReservation;
	}

}