public override async Task ExecuteAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
object id = Key;
ISessionImplementor session = Session;
ICollectionPersister persister = Persister;
IPersistentCollection collection = Collection;
bool affectedByFilters = persister.IsAffectedByEnabledFilters(session);
bool statsEnabled = session.Factory.Statistics.IsStatisticsEnabled;
Stopwatch stopwatch = null;
if (statsEnabled)
{
stopwatch = Stopwatch.StartNew();
}
await(PreUpdateAsync(cancellationToken)).ConfigureAwait(false);
if (!collection.WasInitialized)
{
if (!collection.HasQueuedOperations)
{
throw new AssertionFailure("no queued adds");
}
//do nothing - we only need to notify the cache...
}
else if (!affectedByFilters && collection.Empty)
{
if (!emptySnapshot)
{
await(persister.RemoveAsync(id, session, cancellationToken)).ConfigureAwait(false);
}
}
else if (collection.NeedsRecreate(persister))
{
if (affectedByFilters)
{
throw new HibernateException("cannot recreate collection while filter is enabled: "
+ MessageHelper.CollectionInfoString(persister, collection, id, session));
}
if (!emptySnapshot)
{
await(persister.RemoveAsync(id, session, cancellationToken)).ConfigureAwait(false);
}
await(persister.RecreateAsync(collection, id, session, cancellationToken)).ConfigureAwait(false);
}
else
{
await(persister.DeleteRowsAsync(collection, id, session, cancellationToken)).ConfigureAwait(false);
await(persister.UpdateRowsAsync(collection, id, session, cancellationToken)).ConfigureAwait(false);
await(persister.InsertRowsAsync(collection, id, session, cancellationToken)).ConfigureAwait(false);
}
Session.PersistenceContext.GetCollectionEntry(collection).AfterAction(collection);
await(EvictAsync(cancellationToken)).ConfigureAwait(false);
await(PostUpdateAsync(cancellationToken)).ConfigureAwait(false);
if (statsEnabled)
{
stopwatch.Stop();
Session.Factory.StatisticsImplementor.UpdateCollection(Persister.Role, stopwatch.Elapsed);
}
}
