/// <summary>
/// Prepares the save call using the given requested id.
/// </summary>
/// <param name="entity">The entity to be saved. </param>
/// <param name="requestedId">The id to which to associate the entity. </param>
/// <param name="entityName">The name of the entity being saved. </param>
/// <param name="anything">Generally cascade-specific information. </param>
/// <param name="source">The session which is the source of this save event. </param>
/// <param name="cancellationToken">A cancellation token that can be used to cancel the work</param>
/// <returns> The id used to save the entity. </returns>
protected virtual Task <object> SaveWithRequestedIdAsync(object entity, object requestedId, string entityName, object anything, IEventSource source, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled <object>(cancellationToken));
}
try
{
return(PerformSaveAsync(entity, requestedId, source.GetEntityPersister(entityName, entity), false, anything, source, true, cancellationToken));
}
catch (Exception ex)
{
return(Task.FromException <object>(ex));
}
}
protected virtual void EntityIsPersistent(MergeEvent @event, IDictionary copyCache)
{
log.Debug("ignoring persistent instance");
//TODO: check that entry.getIdentifier().equals(requestedId)
object entity = @event.Entity;
IEventSource source = @event.Session;
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
copyCache[entity] = entity; //before cascade!
CascadeOnMerge(source, persister, entity, copyCache);
CopyValues(persister, entity, entity, source, copyCache);
@event.Result = entity;
}
protected virtual async Task EntityIsPersistentAsync(MergeEvent @event, IDictionary copyCache, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
log.Debug("ignoring persistent instance");
//TODO: check that entry.getIdentifier().equals(requestedId)
object entity = @event.Entity;
IEventSource source = @event.Session;
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
((EventCache)copyCache).Add(entity, entity, true); //before cascade!
await(CascadeOnMergeAsync(source, persister, entity, copyCache, cancellationToken)).ConfigureAwait(false);
await(CopyValuesAsync(persister, entity, entity, source, copyCache, cancellationToken)).ConfigureAwait(false);
@event.Result = entity;
}
protected virtual void EntityIsTransient(MergeEvent @event, IDictionary copyCache)
{
log.Debug("merging transient instance");
object entity = @event.Entity;
IEventSource source = @event.Session;
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
string entityName = persister.EntityName;
object id = persister.HasIdentifierProperty ? persister.GetIdentifier(entity, source.EntityMode) : null;
object copy = persister.Instantiate(id, source.EntityMode); // should this be Session.instantiate(Persister, ...)?
copyCache[entity] = copy; //before cascade!
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
//cascadeOnMerge(event, persister, entity, copyCache, Cascades.CASCADE_BEFORE_MERGE);
base.CascadeBeforeSave(source, persister, entity, copyCache);
CopyValues(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyFromParent);
//this bit is only *really* absolutely necessary for handling
//requestedId, but is also good if we merge multiple object
//graphs, since it helps ensure uniqueness
object requestedId = @event.RequestedId;
if (requestedId == null)
{
SaveWithGeneratedId(copy, entityName, copyCache, source, false);
}
else
{
SaveWithRequestedId(copy, requestedId, entityName, copyCache, source);
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
base.CascadeAfterSave(source, persister, entity, copyCache);
CopyValues(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyToParent);
@event.Result = copy;
}
protected virtual void EntityIsPersistent(PersistEvent @event, IDictionary createCache)
{
log.Debug("ignoring persistent instance");
IEventSource source = @event.Session;
//TODO: check that entry.getIdentifier().equals(requestedId)
object entity = source.PersistenceContext.Unproxy(@event.Entity);
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
object tempObject;
tempObject = createCache[entity];
createCache[entity] = entity;
if (tempObject == null)
{
//TODO: merge into one method!
CascadeBeforeSave(source, persister, entity, createCache);
CascadeAfterSave(source, persister, entity, createCache);
}
}
protected object GetValue(Property property, object[] state)
{
var index = System.Array.IndexOf(Persister.PropertyNames, property.Name);
if (index < 0)
{
return(null);
}
var value = state[index];
// For entities, return the entity id.
if (value != null && property.Type is EntityType entityType)
{
var entityName = entityType.GetAssociatedEntityName();
var persister = Session.GetEntityPersister(entityName, value);
var id = persister.GetIdentifier(value);
value = id;
}
return(value);
}
/// <summary>
/// Prepares the save call using the given requested id.
/// </summary>
/// <param name="entity">The entity to be saved. </param>
/// <param name="requestedId">The id to which to associate the entity. </param>
/// <param name="entityName">The name of the entity being saved. </param>
/// <param name="anything">Generally cascade-specific information. </param>
/// <param name="source">The session which is the source of this save event. </param>
/// <returns> The id used to save the entity. </returns>
protected virtual object SaveWithRequestedId(object entity, object requestedId, string entityName, object anything, IEventSource source)
{
return PerformSave(entity, requestedId, source.GetEntityPersister(entityName, entity), false, anything, source, true);
}
/// <summary>
/// Prepares the save call using a newly generated id.
/// </summary>
/// <param name="entity">The entity to be saved </param>
/// <param name="entityName">The entity-name for the entity to be saved </param>
/// <param name="anything">Generally cascade-specific information. </param>
/// <param name="source">The session which is the source of this save event. </param>
/// <param name="requiresImmediateIdAccess">
/// does the event context require
/// access to the identifier immediately after execution of this method (if
/// not, post-insert style id generators may be postponed if we are outside
/// a transaction).
/// </param>
/// <returns>
/// The id used to save the entity; may be null depending on the
/// type of id generator used and the requiresImmediateIdAccess value
/// </returns>
protected virtual object SaveWithGeneratedId(object entity, string entityName, object anything, IEventSource source, bool requiresImmediateIdAccess)
{
IEntityPersister persister = source.GetEntityPersister(entityName, entity);
object generatedId = persister.IdentifierGenerator.Generate(source, entity);
if (generatedId == null)
{
throw new IdentifierGenerationException("null id generated for:" + entity.GetType());
}
else if (generatedId == IdentifierGeneratorFactory.ShortCircuitIndicator)
{
return source.GetIdentifier(entity);
}
else if (generatedId == IdentifierGeneratorFactory.PostInsertIndicator)
{
return PerformSave(entity, null, persister, true, anything, source, requiresImmediateIdAccess);
}
else
{
if (log.IsDebugEnabled)
{
log.Debug(string.Format("generated identifier: {0}, using strategy: {1}",
persister.IdentifierType.ToLoggableString(generatedId, source.Factory),
persister.IdentifierGenerator.GetType().FullName));
}
return PerformSave(entity, generatedId, persister, false, anything, source, true);
}
}
public virtual async Task OnReplicateAsync(ReplicateEvent @event, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
IEventSource source = @event.Session;
if (source.PersistenceContext.ReassociateIfUninitializedProxy(@event.Entity))
{
log.Debug("uninitialized proxy passed to replicate()");
return;
}
object entity = await(source.PersistenceContext.UnproxyAndReassociateAsync(@event.Entity, cancellationToken)).ConfigureAwait(false);
if (source.PersistenceContext.IsEntryFor(entity))
{
log.Debug("ignoring persistent instance passed to replicate()");
//hum ... should we cascade anyway? throw an exception? fine like it is?
return;
}
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
// get the id from the object
/*if ( persister.isUnsaved(entity, source) ) {
* throw new TransientObjectException("transient instance passed to replicate()");
* }*/
object id = persister.GetIdentifier(entity);
if (id == null)
{
throw new TransientObjectException("instance with null id passed to replicate()");
}
ReplicationMode replicationMode = @event.ReplicationMode;
object oldVersion;
if (replicationMode == ReplicationMode.Exception)
{
//always do an INSERT, and let it fail by constraint violation
oldVersion = null;
}
else
{
//what is the version on the database?
oldVersion = await(persister.GetCurrentVersionAsync(id, source, cancellationToken)).ConfigureAwait(false);
}
if (oldVersion != null)
{
if (log.IsDebugEnabled())
{
log.Debug("found existing row for {0}", MessageHelper.InfoString(persister, id, source.Factory));
}
// HHH-2378
object realOldVersion = persister.IsVersioned ? oldVersion : null;
bool canReplicate =
replicationMode.ShouldOverwriteCurrentVersion(entity, realOldVersion,
persister.GetVersion(entity),
persister.VersionType);
if (canReplicate)
{
//will result in a SQL UPDATE:
await(PerformReplicationAsync(entity, id, realOldVersion, persister, replicationMode, source, cancellationToken)).ConfigureAwait(false);
}
else
{
//else do nothing (don't even reassociate object!)
log.Debug("no need to replicate");
}
//TODO: would it be better to do a refresh from db?
}
else
{
// no existing row - do an insert
if (log.IsDebugEnabled())
{
log.Debug("no existing row, replicating new instance {0}", MessageHelper.InfoString(persister, id, source.Factory));
}
bool regenerate = persister.IsIdentifierAssignedByInsert; // prefer re-generation of identity!
EntityKey key = regenerate ? null : source.GenerateEntityKey(id, persister);
await(PerformSaveOrReplicateAsync(entity, key, persister, regenerate, replicationMode, source, true, cancellationToken)).ConfigureAwait(false);
}
}
public virtual void OnDelete(DeleteEvent @event, ISet <object> transientEntities)
{
IEventSource source = @event.Session;
IPersistenceContext persistenceContext = source.PersistenceContext;
object entity = persistenceContext.UnproxyAndReassociate(@event.Entity);
EntityEntry entityEntry = persistenceContext.GetEntry(entity);
IEntityPersister persister;
object id;
object version;
if (entityEntry == null)
{
log.Debug("entity was not persistent in delete processing");
persister = source.GetEntityPersister(@event.EntityName, entity);
if (ForeignKeys.IsTransientSlow(persister.EntityName, entity, source))
{
DeleteTransientEntity(source, entity, @event.CascadeDeleteEnabled, persister, transientEntities);
// EARLY EXIT!!!
return;
}
else
{
PerformDetachedEntityDeletionCheck(@event);
}
id = persister.GetIdentifier(entity);
if (id == null)
{
throw new TransientObjectException("the detached instance passed to delete() had a null identifier");
}
EntityKey key = source.GenerateEntityKey(id, persister);
persistenceContext.CheckUniqueness(key, entity);
new OnUpdateVisitor(source, id, entity).Process(entity, persister);
version = persister.GetVersion(entity);
entityEntry = persistenceContext.AddEntity(
entity,
persister.IsMutable ? Status.Loaded : Status.ReadOnly,
persister.GetPropertyValues(entity),
key,
version,
LockMode.None,
true,
persister,
false);
}
else
{
log.Debug("deleting a persistent instance");
if (entityEntry.Status == Status.Deleted || entityEntry.Status == Status.Gone)
{
log.Debug("object was already deleted");
return;
}
persister = entityEntry.Persister;
id = entityEntry.Id;
version = entityEntry.Version;
}
if (InvokeDeleteLifecycle(source, entity, persister))
{
return;
}
DeleteEntity(source, entity, entityEntry, @event.CascadeDeleteEnabled, persister, transientEntities);
if (source.Factory.Settings.IsIdentifierRollbackEnabled)
{
persister.ResetIdentifier(entity, id, version);
}
}
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));
}
}
}
}
protected virtual async Task EntityIsDetachedAsync(MergeEvent @event, IDictionary copyCache, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
log.Debug("merging detached instance");
object entity = @event.Entity;
IEventSource source = @event.Session;
IEntityPersister persister = source.GetEntityPersister(@event.EntityName, entity);
string entityName = persister.EntityName;
object id = @event.RequestedId;
if (id == null)
{
id = persister.GetIdentifier(entity);
}
else
{
// check that entity id = requestedId
object entityId = persister.GetIdentifier(entity);
if (!persister.IdentifierType.IsEqual(id, entityId, source.Factory))
{
throw new HibernateException("merge requested with id not matching id of passed entity");
}
}
string previousFetchProfile = source.FetchProfile;
source.FetchProfile = "merge";
//we must clone embedded composite identifiers, or
//we will get back the same instance that we pass in
object clonedIdentifier = persister.IdentifierType.DeepCopy(id, source.Factory);
object result = await(source.GetAsync(persister.EntityName, clonedIdentifier, cancellationToken)).ConfigureAwait(false);
source.FetchProfile = previousFetchProfile;
if (result == null)
{
//TODO: we should throw an exception if we really *know* for sure
// that this is a detached instance, rather than just assuming
//throw new StaleObjectStateException(entityName, id);
// we got here because we assumed that an instance
// with an assigned id was detached, when it was
// really persistent
await(EntityIsTransientAsync(@event, copyCache, cancellationToken)).ConfigureAwait(false);
}
else
{
// NH different behavior : NH-1517
if (InvokeUpdateLifecycle(entity, persister, source))
{
return;
}
((EventCache)copyCache).Add(entity, result, true); //before cascade!
object target = source.PersistenceContext.Unproxy(result);
if (target == entity)
{
throw new AssertionFailure("entity was not detached");
}
else if (!(await(source.GetEntityNameAsync(target, cancellationToken)).ConfigureAwait(false)).Equals(entityName))
{
throw new WrongClassException("class of the given object did not match class of persistent copy",
@event.RequestedId, persister.EntityName);
}
else if (IsVersionChanged(entity, source, persister, target))
{
if (source.Factory.Statistics.IsStatisticsEnabled)
{
source.Factory.StatisticsImplementor.OptimisticFailure(entityName);
}
throw new StaleObjectStateException(persister.EntityName, id);
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
await(CascadeOnMergeAsync(source, persister, entity, copyCache, cancellationToken)).ConfigureAwait(false);
await(CopyValuesAsync(persister, entity, target, source, copyCache, cancellationToken)).ConfigureAwait(false);
//copyValues works by reflection, so explicitly mark the entity instance dirty
MarkInterceptorDirty(entity, target);
@event.Result = result;
}
}
private object MergeTransientEntity(object entity, string entityName, object requestedId, IEventSource source, IDictionary copyCache)
{
IEntityPersister persister = source.GetEntityPersister(entityName, entity);
object id = persister.HasIdentifierProperty ? persister.GetIdentifier(entity, source.EntityMode) : null;
object copy = null;
if (copyCache.Contains(entity))
{
copy = copyCache[entity];
persister.SetIdentifier(copy, id, source.EntityMode);
}
else
{
copy = source.Instantiate(persister, id);
((EventCache)copyCache).Add(entity, copy, true); // before cascade!
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
//cascadeOnMerge(event, persister, entity, copyCache, Cascades.CASCADE_BEFORE_MERGE);
base.CascadeBeforeSave(source, persister, entity, copyCache);
CopyValues(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyFromParent);
try
{
// try saving; check for non-nullable properties that are null or transient entities before saving
this.SaveTransientEntity(copy, entityName, requestedId, source, copyCache);
}
catch (PropertyValueException ex)
{
string propertyName = ex.PropertyName;
object propertyFromCopy = persister.GetPropertyValue(copy, propertyName, source.EntityMode);
object propertyFromEntity = persister.GetPropertyValue(entity, propertyName, source.EntityMode);
IType propertyType = persister.GetPropertyType(propertyName);
EntityEntry copyEntry = source.PersistenceContext.GetEntry(copy);
if (propertyFromCopy == null || !propertyType.IsEntityType)
{
log.InfoFormat("property '{0}.{1}' is null or not an entity; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromCopy);
throw;
}
if (!copyCache.Contains(propertyFromEntity))
{
log.InfoFormat("property '{0}.{1}' from original entity is not in copyCache; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
throw;
}
if (((EventCache)copyCache).IsOperatedOn(propertyFromEntity))
{
log.InfoFormat("property '{0}.{1}' from original entity is in copyCache and is in the process of being merged; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
}
else
{
log.InfoFormat("property '{0}.{1}' from original entity is in copyCache and is not in the process of being merged; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
}
// continue...; we'll find out if it ends up not getting saved later
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
base.CascadeAfterSave(source, persister, entity, copyCache);
CopyValues(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyToParent);
return copy;
}
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(null, 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);
}
}
public virtual void OnMerge(MergeEvent @event, IDictionary copyCache)
{
IEventSource source = @event.Session;
object original = @event.Original;
if (original != null)
{
object entity;
if (original is INHibernateProxy)
{
ILazyInitializer li = ((INHibernateProxy)original).HibernateLazyInitializer;
if (li.IsUninitialized)
{
log.Debug("ignoring uninitialized proxy");
@event.Result = source.Load(li.PersistentClass, li.Identifier);
return; //EARLY EXIT!
}
else
{
entity = li.GetImplementation();
}
}
else
{
entity = original;
}
if (copyCache.Contains(entity))
{
log.Debug("already merged");
@event.Result = entity;
}
else
{
@event.Entity = entity;
EntityState entityState = EntityState.Undefined;
// 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, source.EntityMode);
if (id != null)
{
EntityKey key = new EntityKey(id, persister, source.EntityMode);
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 = GetEntityState(entity, @event.EntityName, entry, source);
}
switch (entityState)
{
case EntityState.Persistent:
EntityIsPersistent(@event, copyCache);
break;
case EntityState.Transient:
EntityIsTransient(@event, copyCache);
break;
case EntityState.Detached:
EntityIsDetached(@event, copyCache);
break;
default:
throw new ObjectDeletedException("deleted instance passed to merge", null, GetLoggableName(@event.EntityName, entity));
}
}
}
}
/// <summary>
/// Prepares the save call using the given requested id.
/// </summary>
/// <param name="entity">The entity to be saved. </param>
/// <param name="requestedId">The id to which to associate the entity. </param>
/// <param name="entityName">The name of the entity being saved. </param>
/// <param name="anything">Generally cascade-specific information. </param>
/// <param name="source">The session which is the source of this save event. </param>
/// <returns> The id used to save the entity. </returns>
protected virtual object SaveWithRequestedId(object entity, object requestedId, string entityName, object anything, IEventSource source)
{
return(PerformSave(entity, requestedId, source.GetEntityPersister(entityName, entity), false, anything, source, true));
}
private async Task <object> MergeTransientEntityAsync(object entity, string entityName, object requestedId, IEventSource source, IDictionary copyCache, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
IEntityPersister persister = source.GetEntityPersister(entityName, entity);
object id = persister.HasIdentifierProperty ? persister.GetIdentifier(entity) : null;
object copy = null;
if (copyCache.Contains(entity))
{
copy = copyCache[entity];
persister.SetIdentifier(copy, id);
}
else
{
copy = source.Instantiate(persister, id);
((EventCache)copyCache).Add(entity, copy, true); // before cascade!
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
//cascadeOnMerge(event, persister, entity, copyCache, Cascades.CASCADE_BEFORE_MERGE);
await(base.CascadeBeforeSaveAsync(source, persister, entity, copyCache, cancellationToken)).ConfigureAwait(false);
await(CopyValuesAsync(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyFromParent, cancellationToken)).ConfigureAwait(false);
try
{
// try saving; check for non-nullable properties that are null or transient entities before saving
await(this.SaveTransientEntityAsync(copy, entityName, requestedId, source, copyCache, cancellationToken)).ConfigureAwait(false);
}
catch (PropertyValueException ex)
{
string propertyName = ex.PropertyName;
object propertyFromCopy = persister.GetPropertyValue(copy, propertyName);
object propertyFromEntity = persister.GetPropertyValue(entity, propertyName);
IType propertyType = persister.GetPropertyType(propertyName);
EntityEntry copyEntry = source.PersistenceContext.GetEntry(copy);
if (propertyFromCopy == null || !propertyType.IsEntityType)
{
log.Info("property '{0}.{1}' is null or not an entity; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromCopy);
throw;
}
if (!copyCache.Contains(propertyFromEntity))
{
log.Info("property '{0}.{1}' from original entity is not in copyCache; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
throw;
}
if (((EventCache)copyCache).IsOperatedOn(propertyFromEntity))
{
log.Info(ex, "property '{0}.{1}' from original entity is in copyCache and is in the process of being merged; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
}
else
{
log.Info(ex, "property '{0}.{1}' from original entity is in copyCache and is not in the process of being merged; {1} =[{2}]", copyEntry.EntityName, propertyName, propertyFromEntity);
}
// continue...; we'll find out if it ends up not getting saved later
}
// cascade first, so that all unsaved objects get their
// copy created before we actually copy
await(base.CascadeAfterSaveAsync(source, persister, entity, copyCache, cancellationToken)).ConfigureAwait(false);
await(CopyValuesAsync(persister, entity, copy, source, copyCache, ForeignKeyDirection.ForeignKeyToParent, cancellationToken)).ConfigureAwait(false);
return(copy);
}
public virtual void OnRefresh(RefreshEvent @event, IDictionary refreshedAlready)
{
IEventSource source = @event.Session;
if (source.PersistenceContext.ReassociateIfUninitializedProxy(@event.Entity))
{
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(null, obj); //refresh() does not pass an entityName
id = persister.GetIdentifier(obj, source.EntityMode);
if (log.IsDebugEnabled)
{
log.Debug("refreshing transient " + MessageHelper.InfoString(persister, id, source.Factory));
}
EntityKey key = new EntityKey(id, persister, source.EntityMode);
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 " + 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 = new EntityKey(id, persister, source.EntityMode);
source.PersistenceContext.RemoveEntity(key);
if (persister.HasCollections)
{
new EvictVisitor(source).Process(obj, persister);
}
}
if (persister.HasCache)
{
CacheKey ck = new CacheKey(id, persister.IdentifierType, persister.RootEntityName, source.EntityMode, source.Factory);
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);
// NH-3253: Forcing simple load to prevent the redundante instance
//on session:
//Ocurre when:
// -there is a 'one-to-many' 'Parent-Child' relationship;
// -AND the 'Parent' 'many-to-one' association is ' fetch="select" ';
// -AND 'Child' is using a 'composite-id' and 'key-many-to-one' to the
//'Parent'.
object result;
if (this.IsReferencedByCompositeId(persister))
{
result = persister.Load(id, obj, @event.LockMode, source);
}
string previousFetchProfile = source.FetchProfile;
source.FetchProfile = "refresh";
result = persister.Load(id, obj, @event.LockMode, source);
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.IsTransient(persister.EntityName, obj, result == null, @event.Session))
{
UnresolvableObjectException.ThrowIfNull(result, id, persister.EntityName);
}
}