/// <summary> /// Checks if any of the hosted identities expired. /// If so, it deletes them. /// </summary> public void CheckExpiredHostedIdentities() { log.Trace("()"); DateTime now = DateTime.UtcNow; List <byte[]> imagesToDelete = new List <byte[]>(); using (UnitOfWork unitOfWork = new UnitOfWork()) { // Disable change tracking for faster multiple deletes. unitOfWork.Context.ChangeTracker.AutoDetectChangesEnabled = false; DatabaseLock lockObject = UnitOfWork.HostedIdentityLock; unitOfWork.AcquireLock(lockObject); try { List <HostedIdentity> expiredIdentities = unitOfWork.HostedIdentityRepository.Get(i => i.ExpirationDate < now, null, true).ToList(); if (expiredIdentities.Count > 0) { log.Debug("There are {0} expired hosted identities.", expiredIdentities.Count); foreach (HostedIdentity identity in expiredIdentities) { if (identity.ProfileImage != null) { imagesToDelete.Add(identity.ProfileImage); } if (identity.ThumbnailImage != null) { imagesToDelete.Add(identity.ThumbnailImage); } unitOfWork.HostedIdentityRepository.Delete(identity); log.Debug("Identity ID '{0}' expired and will be deleted.", identity.IdentityId.ToHex()); } unitOfWork.SaveThrow(); log.Debug("{0} expired hosted identities were deleted.", expiredIdentities.Count); } else { log.Debug("No expired hosted identities found."); } } catch (Exception e) { log.Error("Exception occurred: {0}", e.ToString()); } unitOfWork.ReleaseLock(lockObject); } if (imagesToDelete.Count > 0) { ImageManager imageManager = (ImageManager)Base.ComponentDictionary["Data.ImageManager"]; foreach (byte[] hash in imagesToDelete) { imageManager.RemoveImageReference(hash); } } log.Trace("(-)"); }