/**
* Commit seats held for a specific customer
*
* @param seatHoldId the seat hold identifier
* @param customerEmail the email address of the customer to which the seat hold is assigned
* @return a reservation confirmation code
*/
@PUT
@Timed
@ExceptionMetered
@Path("/reserveSeats")
@Produces({MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON})
public String reserveSeats(
@QueryParam("seatHoldId") @NotNull Integer seatHoldId, @Email @NotBlank String customerEmail)
throws InvalidSeatHoldRequestException, ReservationNotFoundException {
validateCustomerEmail(customerEmail);
Integer seatLevelId = holdId2SeatLevel.get(seatHoldId);
if (seatLevelId == null) {
throw new InvalidSeatHoldRequestException(
String.format("Seat hold #%d does not exist in the venue", seatHoldId));
}
ReservationManager resource = seatLevelResourceManager[seatLevelId];
ReservationHold hold = resource.getReservation(seatHoldId);
if (hold == null) {
throw new ReservationNotFoundException(seatHoldId, customerEmail);
}
SeatHold seatHold = buildSeatHold(hold);
if (!Objects.equals(seatHold.getCustomerEmail(), customerEmail)) {
throw new InvalidSeatHoldRequestException(
String.format(
"Seat hold #%d is not associated with customer email %s", seatHoldId, customerEmail));
}
if (!resource.confirmHold(seatHold.getReservationId())) {
throw new ReservationNotFoundException(seatHoldId, customerEmail);
}
return generateReservationCode(seatHoldId, customerEmail);
}
/**
* The number of seats in the requested level that are neither held nor reserved
*
* @param venueLevel a numeric venue level identifier to limit the search
* @return the number of tickets available on the provided level
* @throws VenueLevelNotFoundException
*/
@GET
@Timed
@ExceptionMetered
@Path("/numSeatsAvailable")
@Produces({MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN})
public int numSeatsAvailable(@QueryParam("venueLevel") Integer venueLevel)
throws VenueLevelNotFoundException {
int fromLevel = 0;
int toLevel = seatLevelResourceManager.length - 1;
if (venueLevel != null) {
if (venueLevel < 0 || venueLevel >= seatLevelResourceManager.length) {
throw new VenueLevelNotFoundException(venueLevel);
}
fromLevel = venueLevel;
toLevel = venueLevel;
}
int available = 0;
for (; fromLevel <= toLevel; ++fromLevel) {
ReservationManager resource = seatLevelResourceManager[fromLevel];
available += resource.countAvailableSlots();
}
return available;
}
/**
* Find and hold the best available seats for a customer
*
* @param numSeats the number of seats to find and hold
* @param minLevel the minimum venue level
* @param maxLevel the maximum venue level
* @param customerEmail unique identifier for the customer
* @return a SeatHold object identifying the specific seats and related information
* @throws InvalidSeatHoldRequestException, NoSeatsAvailableException
*/
@POST
@Timed
@ExceptionMetered
@Path("/findAndHoldSeats")
public SeatHold findAndHoldSeats(
@QueryParam("numSeats") @NotNull Integer numSeats,
@QueryParam("minLevel") Integer minLevel,
@QueryParam("maxLevel") Integer maxLevel,
@Email @NotNull @NotBlank String customerEmail)
throws InvalidSeatHoldRequestException, NoSeatsAvailableException {
if (numSeats == 0) {
return null;
}
if (numSeats < 0) {
throw new InvalidSeatHoldRequestException(
String.format("Invalid number of hold [%d] being requested", numSeats));
}
int lo = minLevel != null ? minLevel : 0;
int hi = maxLevel != null ? maxLevel : seatLevelResourceManager.length - 1;
if (lo > hi || lo < 0 || hi >= seatLevelResourceManager.length) {
throw new InvalidSeatHoldRequestException(
String.format("Seat hold level constraints are not valid [%d, %d]", lo, hi));
}
validateCustomerEmail(customerEmail);
for (; hi >= lo; --hi) {
ReservationManager resource = seatLevelResourceManager[hi];
ReservationHold hold = resource.requestHold(numSeats, customerEmail);
if (hold != null) {
SeatHold seatHold = buildSeatHold(hold);
holdId2SeatLevel.put(seatHold.getReservationId(), seatHold.getLevel());
return seatHold;
}
}
throw new NoSeatsAvailableException();
}
/**
* The details for reservation holds at the venue
*
* @return
* @throws VenueLevelNotFoundException
*/
@GET
@Timed
@ExceptionMetered
@Path("/holdDetails")
public List<SeatLevelHoldDetail> venueHoldDetails(@QueryParam("venueLevel") Integer venueLevel)
throws VenueLevelNotFoundException {
ArrayList<SeatLevelHoldDetail> seatLevelHoldDetails = new ArrayList<>();
int fromLevel = 0;
int toLevel = seatLevelResourceManager.length - 1;
if (venueLevel != null) {
if (venueLevel < 0 || venueLevel >= seatLevelResourceManager.length) {
throw new VenueLevelNotFoundException(venueLevel);
}
fromLevel = venueLevel;
toLevel = venueLevel;
}
for (; fromLevel <= toLevel; ++fromLevel) {
ReservationManager resource = seatLevelResourceManager[fromLevel];
SeatLevel seatLevel = configuration.getSeatLevels().get(fromLevel);
List<SeatHold> seatHolds =
resource
.getAllReservations()
.stream()
.map(this::buildSeatHold)
.collect(Collectors.toList());
seatLevelHoldDetails.add(
new SeatLevelHoldDetail(
seatLevel.getName(), seatLevel.getRows(), seatLevel.getSeatsInRow(), seatHolds));
}
return seatLevelHoldDetails;
}
/**
* Initialize the venue seat reservation manager
*
* @param configuration
* @throws Exception
*/
public VenueTicketManager(VenueSeatingConfiguration configuration) throws Exception {
if (configuration.getSeatLevels().size() == 0) {
throw new IllegalArgumentException("configuration.seatLevels");
}
this.configuration = configuration;
this.seatLevelResourceManager = new ReservationManager[configuration.getSeatLevels().size()];
for (int lvlNum = 0; lvlNum < configuration.getSeatLevels().size(); ++lvlNum) {
SeatLevel lvl = configuration.getSeatLevels().get(lvlNum);
if (lvl.getRows() < 1) {
throw new Exception(
String.format(
"Invalid number of rows (%d) for seating level %d", lvl.getRows(), lvlNum));
}
if (lvl.getSeatsInRow() < 1) {
throw new Exception(
String.format(
"Invalid number of seats (%d) for seating level %d, row %d",
lvlNum, lvl.getRows(), lvl.getSeatsInRow()));
}
int capacity = lvl.getRows() * lvl.getSeatsInRow();
ReservationManager resource =
new ReservationManager(
lvlNum,
capacity,
new HoldTimeStampProvider(configuration.getHoldsExpireAfter()),
lvl.getName());
resource.setReservationIdCounter(reservationIdCounter);
this.seatLevelResourceManager[lvlNum] = resource;
}
}
