protected virtual async Task EntityIsPersistentAsync(PersistEvent @event, IDictionary createCache, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
log.Debug("ignoring persistent instance");
IEventSource source = @event.Session;
//TODO: check that entry.getIdentifier().equals(requestedId)
object entity = source.PersistenceContext.Unproxy(@event.Entity);
/* NH-2565: the UnProxy may return a "field interceptor proxy". When EntityName is null the session.GetEntityPersister will try to guess it.
* Instead change a session's method I'll try to guess the EntityName here.
* Because I'm using a session's method perhaps could be better if each session's method, which implementation forward to a method having the EntityName as parameter,
* use the BestGuessEntityName directly instead do "70 turns" before call it.
*/
if (@event.EntityName == null)
{
@event.EntityName = source.BestGuessEntityName(entity);
}
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
object tempObject;
tempObject = createCache[entity];
createCache[entity] = entity;
if (tempObject == null)
{
//TODO: merge into one method!
await(CascadeBeforeSaveAsync(source, persister, entity, createCache, cancellationToken)).ConfigureAwait(false);
await(CascadeAfterSaveAsync(source, persister, entity, createCache, cancellationToken)).ConfigureAwait(false);
}
}
public virtual async Task OnMergeAsync(MergeEvent @event, IDictionary copiedAlready, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
EventCache copyCache = (EventCache)copiedAlready;
IEventSource source = @event.Session;
object original = @event.Original;
if (original != null)
{
object entity;
if (original.IsProxy())
{
ILazyInitializer li = ((INHibernateProxy)original).HibernateLazyInitializer;
if (li.IsUninitialized)
{
log.Debug("ignoring uninitialized proxy");
@event.Result = await(source.LoadAsync(li.EntityName, li.Identifier, cancellationToken)).ConfigureAwait(false);
return; //EARLY EXIT!
}
else
{
entity = await(li.GetImplementationAsync(cancellationToken)).ConfigureAwait(false);
}
}
else
{
entity = original;
}
if (copyCache.Contains(entity) && copyCache.IsOperatedOn(entity))
{
log.Debug("already in merge process");
@event.Result = entity;
}
else
{
if (copyCache.Contains(entity))
{
log.Info("already in copyCache; setting in merge process");
copyCache.SetOperatedOn(entity, true);
}
@event.Entity = entity;
EntityState entityState = EntityState.Undefined;
if (ReferenceEquals(null, @event.EntityName))
{
@event.EntityName = source.BestGuessEntityName(entity);
}
// Check the persistence context for an entry relating to this
// entity to be merged...
EntityEntry entry = source.PersistenceContext.GetEntry(entity);
if (entry == null)
{
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
object id = persister.GetIdentifier(entity);
if (id != null)
{
EntityKey key = source.GenerateEntityKey(id, persister);
object managedEntity = source.PersistenceContext.GetEntity(key);
entry = source.PersistenceContext.GetEntry(managedEntity);
if (entry != null)
{
// we have specialized case of a detached entity from the
// perspective of the merge operation. Specifically, we
// have an incoming entity instance which has a corresponding
// entry in the current persistence context, but registered
// under a different entity instance
entityState = EntityState.Detached;
}
}
}
if (entityState == EntityState.Undefined)
{
entityState = await(GetEntityStateAsync(entity, @event.EntityName, entry, source, cancellationToken)).ConfigureAwait(false);
}
switch (entityState)
{
case EntityState.Persistent:
await(EntityIsPersistentAsync(@event, copyCache, cancellationToken)).ConfigureAwait(false);
break;
case EntityState.Transient:
await(EntityIsTransientAsync(@event, copyCache, cancellationToken)).ConfigureAwait(false);
break;
case EntityState.Detached:
await(EntityIsDetachedAsync(@event, copyCache, cancellationToken)).ConfigureAwait(false);
break;
default:
throw new ObjectDeletedException("deleted instance passed to merge", null, GetLoggableName(@event.EntityName, entity));
}
}
}
}
public virtual void OnRefresh(RefreshEvent @event, IDictionary refreshedAlready)
{
IEventSource source = @event.Session;
bool isTransient = !source.Contains(@event.Entity);
if (source.PersistenceContext.ReassociateIfUninitializedProxy(@event.Entity))
{
if (isTransient)
{
source.SetReadOnly(@event.Entity, source.DefaultReadOnly);
}
return;
}
object obj = source.PersistenceContext.UnproxyAndReassociate(@event.Entity);
if (refreshedAlready.Contains(obj))
{
log.Debug("already refreshed");
return;
}
EntityEntry e = source.PersistenceContext.GetEntry(obj);
IEntityPersister persister;
object id;
if (e == null)
{
persister = source.GetEntityPersister(source.BestGuessEntityName(obj), obj); //refresh() does not pass an entityName
id = persister.GetIdentifier(obj);
if (log.IsDebugEnabled())
{
log.Debug("refreshing transient {0}", MessageHelper.InfoString(persister, id, source.Factory));
}
EntityKey key = source.GenerateEntityKey(id, persister);
if (source.PersistenceContext.GetEntry(key) != null)
{
throw new PersistentObjectException("attempted to refresh transient instance when persistent instance was already associated with the Session: " +
MessageHelper.InfoString(persister, id, source.Factory));
}
}
else
{
if (log.IsDebugEnabled())
{
log.Debug("refreshing {0}", MessageHelper.InfoString(e.Persister, e.Id, source.Factory));
}
if (!e.ExistsInDatabase)
{
throw new HibernateException("this instance does not yet exist as a row in the database");
}
persister = e.Persister;
id = e.Id;
}
// cascade the refresh prior to refreshing this entity
refreshedAlready[obj] = obj;
new Cascade(CascadingAction.Refresh, CascadePoint.BeforeRefresh, source).CascadeOn(persister, obj, refreshedAlready);
if (e != null)
{
EntityKey key = source.GenerateEntityKey(id, persister);
source.PersistenceContext.RemoveEntity(key);
if (persister.HasCollections)
{
new EvictVisitor(source).Process(obj, persister);
}
}
if (persister.HasCache)
{
CacheKey ck = source.GenerateCacheKey(id, persister.IdentifierType, persister.RootEntityName);
persister.Cache.Remove(ck);
}
EvictCachedCollections(persister, id, source.Factory);
// NH Different behavior : NH-1601
// At this point the entity need the real refresh, all elementes of collections are Refreshed,
// the collection state was evicted, but the PersistentCollection (in the entity state)
// is associated with a possible previous session.
new WrapVisitor(source).Process(obj, persister);
string previousFetchProfile = source.FetchProfile;
source.FetchProfile = "refresh";
object result = persister.Load(id, obj, @event.LockMode, source);
if (result != null)
{
if (!persister.IsMutable)
{
source.SetReadOnly(result, true);
}
else
{
source.SetReadOnly(result, e == null ? source.DefaultReadOnly : !e.IsModifiableEntity());
}
}
source.FetchProfile = previousFetchProfile;
// NH Different behavior : we are ignoring transient entities without throw any kind of exception
// because a transient entity is "self refreshed"
if (!ForeignKeys.IsTransientFast(persister.EntityName, obj, @event.Session).GetValueOrDefault(result == null))
{
UnresolvableObjectException.ThrowIfNull(result, id, persister.EntityName);
}
}
