/// <summary> Delete a entity. </summary>
/// <param name="entityName">The entityName for the entity to be deleted </param>
/// <param name="entity">a detached entity instance </param>
public void Delete(string entityName, object entity)
{
using (new SessionIdLoggingContext(SessionId))
{
CheckAndUpdateSessionStatus();
IEntityPersister persister = GetEntityPersister(entityName, entity);
object id = persister.GetIdentifier(entity);
object version = persister.GetVersion(entity);
persister.Delete(id, version, entity, this);
}
}
public override void Execute()
{
object id = Id;
IEntityPersister persister = Persister;
ISessionImplementor session = Session;
object instance = Instance;
bool statsEnabled = Session.Factory.Statistics.IsStatisticsEnabled;
Stopwatch stopwatch = null;
if (statsEnabled)
{
stopwatch = Stopwatch.StartNew();
}
bool veto = PreDelete();
object tmpVersion = version;
if (persister.IsVersionPropertyGenerated)
{
// we need to grab the version value from the entity, otherwise
// we have issues with generated-version entities that may have
// multiple actions queued during the same flush
tmpVersion = persister.GetVersion(instance, session.EntityMode);
}
CacheKey ck;
if (persister.HasCache)
{
ck = new CacheKey(id, persister.IdentifierType, persister.RootEntityName, session.EntityMode, session.Factory);
sLock = persister.Cache.Lock(ck, version);
}
else
{
ck = null;
}
if (!isCascadeDeleteEnabled && !veto)
{
persister.Delete(id, tmpVersion, instance, session);
}
//postDelete:
// After actually deleting a row, record the fact that the instance no longer
// exists on the database (needed for identity-column key generation), and
// remove it from the session cache
IPersistenceContext persistenceContext = session.PersistenceContext;
EntityEntry entry = persistenceContext.RemoveEntry(instance);
if (entry == null)
{
throw new AssertionFailure("Possible nonthreadsafe access to session");
}
entry.PostDelete();
EntityKey key = new EntityKey(entry.Id, entry.Persister, session.EntityMode);
persistenceContext.RemoveEntity(key);
persistenceContext.RemoveProxy(key);
if (persister.HasCache)
{
persister.Cache.Evict(ck);
}
PostDelete();
if (statsEnabled && !veto)
{
stopwatch.Stop();
Session.Factory.StatisticsImplementor.DeleteEntity(Persister.EntityName, stopwatch.Elapsed);
}
}
