/// <summary>
/// Get the hall state which is a collection of occupied seats.
/// </summary>
/// <param name="eventID"></param>
/// <returns></returns>
public SeatIndex[] GetHallState(Guid eventID)
{
LoggingManager.Logger.Log(LoggingCategory.Info,
string.Format(StringsResource.AsyncExecution, "GetHallState", Thread.CurrentThread.ManagedThreadId));
var result = new List<SeatIndex>();
List<Contracts.Reservation> reservations;
//If the hall state is in the cache read it from the cache.
rwl.AcquireReaderLock(new TimeSpan(1, 0, 0));
reservations = (HallCache.Get(eventID.ToString()) as List<Contracts.Reservation>);
rwl.ReleaseReaderLock();
// if the info is not in the cache read it from the database and put it in the cache.
if (reservations == null)
{
ReservationDal Dal = new ReservationDal();
reservations = Dal.GetReservationsByCriteria(
new ReservationCriteria() { EventID = eventID }).ToList();
rwl.AcquireWriterLock(new TimeSpan(1,0,0));
HallCache[eventID.ToString()] = reservations;
rwl.ReleaseWriterLock();
}
foreach (var rs in reservations)
{
foreach (var si in rs.Seats)
{
result.Add(si);
}
}
return result.ToArray();
}
public Contracts.Reservation[] FindReservations(ReservationCriteria criteria)
{
ReservationDal reservationDal = new ReservationDal();
return reservationDal.GetReservationsByCriteria(criteria);
}
public void UpdateResrvation(Contracts.Reservation newReservation)
{
ReservationDal reservationDal = new ReservationDal();
// validate
Contracts.Reservation OldRersevation = reservationDal.GetEntity(newReservation.ID);
if (OldRersevation == null)
throw new HallStateException(string.Format(StringsResource.ReservationNotFound, newReservation.ID));
var oldseats = OldRersevation.Seats;
foreach (var si in newReservation.Seats)
{
if ((si.Row < 0) || (si.Seat < 0))
throw new ArgumentException(StringsResource.InvalidSeatOrRow);
//Check that there is no other reservation for the same seats
var takenSeats = GetHallState(newReservation.EventID);
foreach (var item in newReservation.Seats)
{
if (takenSeats.Contains(item) && (!oldseats.Contains(item)))
throw new ReservationException(StringsResource.SeatAlreadyTaken);
}
}
rwl.AcquireWriterLock(new TimeSpan(1, 0, 0));
//Update the database
reservationDal.UpdateEntity(newReservation);
//2. Upfdate the cache
var cache = HallCache[newReservation.EventID.ToString()] as List<Contracts.Reservation>;
var reservationToUpdate = cache.Where(res => res.ID == newReservation.ID).FirstOrDefault();
reservationToUpdate = newReservation;
rwl.ReleaseWriterLock();
}
public void DeleteResrvation(Guid reservationID)
{
ReservationDal reservationDal = new ReservationDal();
var entity = reservationDal.GetEntity(reservationID);
if (entity != null)
{
rwl.AcquireWriterLock(new TimeSpan(1,0,0));
var reservationsInCache = (HallCache[entity.EventID.ToString()] as List<Contracts.Reservation>);
if (reservationsInCache != null)
reservationsInCache.RemoveAll(rv => (SeatIndex.CreateSeatsString(rv.Seats) == SeatIndex.CreateSeatsString(entity.Seats)) ||
((rv.ID == entity.ID)));
reservationDal.DeleteEntity(reservationID);
rwl.ReleaseWriterLock();
}
}
/// <summary>
/// Submit a new reservation
/// </summary>
/// <param name="reservation"></param>
/// <returns></returns>
public Guid CreateResrvation(Contracts.Reservation reservation)
{
// Create the event in the database
ReservationDal reservationDal = new ReservationDal();
TheaterDal theaterDal = new TheaterDal();
//1. validate
foreach (var si in reservation.Seats)
{
if ((si.Row < 0) || (si.Seat < 0))
throw new ArgumentException(StringsResource.InvalidSeatOrRow);
//Check that there is no other reservation for the same seats
var takenSeats = GetHallState(reservation.EventID);
foreach (var item in reservation.Seats)
{
if (takenSeats.Contains(item))
throw new ReservationException(StringsResource.SeatAlreadyTaken);
}
}
//2. Create an ID if needed.
if (reservation.ID == Guid.Empty)
reservation.ID = Guid.NewGuid();
//3. Create the reservation
Guid id = reservationDal.CreateEntity(reservation);
//4. Add it to the cache.
rwl.AcquireWriterLock(new TimeSpan(1,0,0));
if (HallCache[reservation.EventID.ToString()] == null)
HallCache.Add(reservation.EventID.ToString(), new List<Contracts.Reservation>() { reservation },
null,DateTime.Now.AddDays(30),TimeSpan.FromHours(5),CacheItemPriority.Normal,null);
else
(HallCache[reservation.EventID.ToString()] as List<Contracts.Reservation>).Add(reservation);
rwl.ReleaseWriterLock();
return id;
}
