/// <summary> Delete any entities that were removed from the collection</summary>
private async Task DeleteOrphansAsync(string entityName, IPersistentCollection pc, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
//TODO: suck this logic into the collection!
ICollection orphans;
if (pc.WasInitialized)
{
CollectionEntry ce = eventSource.PersistenceContext.GetCollectionEntry(pc);
orphans = ce == null ? CollectionHelper.EmptyCollection : await(ce.GetOrphansAsync(entityName, pc, cancellationToken)).ConfigureAwait(false);
}
else
{
orphans = await(pc.GetQueuedOrphansAsync(entityName, cancellationToken)).ConfigureAwait(false);
}
foreach (object orphan in orphans)
{
if (orphan != null)
{
log.Info("deleting orphaned entity instance: " + entityName);
await(eventSource.DeleteAsync(entityName, orphan, false, null, cancellationToken)).ConfigureAwait(false);
}
}
}