/// <summary>
/// Force initialization of all non-lazy collections encountered during
/// the current two-phase load (actually, this is a no-op, unless this
/// is the "outermost" load)
/// </summary>
/// <param name="cancellationToken">A cancellation token that can be used to cancel the work</param>
public async Task InitializeNonLazyCollectionsAsync(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (loadCounter == 0)
{
log.Debug("initializing non-lazy collections");
//do this work only at the very highest level of the load
loadCounter++; //don't let this method be called recursively
try
{
while (nonlazyCollections.Count > 0)
{
//note that each iteration of the loop may add new elements
IPersistentCollection tempObject = nonlazyCollections[nonlazyCollections.Count - 1];
nonlazyCollections.RemoveAt(nonlazyCollections.Count - 1);
await(tempObject.ForceInitializationAsync(cancellationToken)).ConfigureAwait(false);
}
}
finally
{
loadCounter--;
ClearNullProperties();
}
}
}
private static Task PrepareCollectionForUpdateAsync(IPersistentCollection collection, CollectionEntry entry, ISessionFactoryImplementor factory, CancellationToken cancellationToken)
{
//1. record the collection role that this collection is referenced by
//2. decide if the collection needs deleting/creating/updating (but don't actually schedule the action yet)
if (entry.IsProcessed)
{
throw new AssertionFailure("collection was processed twice by flush()");
}
if (cancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled <object>(cancellationToken));
}
try
{
entry.IsProcessed = true;
ICollectionPersister loadedPersister = entry.LoadedPersister;
ICollectionPersister currentPersister = entry.CurrentPersister;
if (loadedPersister != null || currentPersister != null)
{
// it is or was referenced _somewhere_
bool ownerChanged = loadedPersister != currentPersister ||
!currentPersister.KeyType.IsEqual(entry.LoadedKey, entry.CurrentKey, factory);
if (ownerChanged)
{
// do a check
bool orphanDeleteAndRoleChanged = loadedPersister != null &&
currentPersister != null && loadedPersister.HasOrphanDelete;
if (orphanDeleteAndRoleChanged)
{
return(Task.FromException <object>(new HibernateException("Don't change the reference to a collection with cascade=\"all-delete-orphan\": " + loadedPersister.Role)));
}
// do the work
if (currentPersister != null)
{
entry.IsDorecreate = true; // we will need to create new entries
}
if (loadedPersister != null)
{
entry.IsDoremove = true; // we will need to remove ye olde entries
if (entry.IsDorecreate)
{
log.Debug("Forcing collection initialization");
return(collection.ForceInitializationAsync(cancellationToken)); // force initialize!
}
}
}
else if (collection.IsDirty)
{
// else if it's elements changed
entry.IsDoupdate = true;
}
}
return(Task.CompletedTask);
}
catch (System.Exception ex)
{
return(Task.FromException <object>(ex));
}
}
