Hi all,
I have a user that has a number of roles. The user is linked to the roles
using a link entity table. I have set the configuration
file to cascade delete the user role link entities when a user is deleted.
We are currently using soft delete to delete entities. We have added a soft
delete event listener that is triggered by a delete.
When an entity is being deleted, it triggers the DeleteEntity event which
marks the entity as deleted.
We also have an override the OnPostUpdate event to remove the entities from
the cache by calling Evict on the entity (so the deleted entity is cleared
from the cache).
If I create a user without any roles and then delete it, everything works
fine. However if I have a user with at least one role assigned and I
delete the user, after the call to Evict in OnPostUpdate, I get a
Nhibernate exception "*NHibernate.AssertionFailure: Possible nonthreadsafe
access to session*"
I have tried, in OnPostUpdate, to use the child session to Evict the
entity. In that case the exception is not thrown, however, the entity is
not evicted.
public void UserDelete(.....)
{
var user = repository.Fetch<User>(id);
repository.Remove(user);
repository.Connection.Commit();
}
// soft delete event listener
protected override void DeleteEntity(NHibernate.Event.IEventSource session,
object entity, ..)
{
var repositoryEntity = entity as deletableentity;
if (repositoryEntity != null)
{
if (!repositoryEntity.IsDeleted)
{
// this marks the entity as
deleted
repositoryEntity.isDeleted
= true;
// cascade delete
this.CascadeBeforeDelete(session, persister, repositoryEntity, entityEntry,
transientEntities);
this.CascadeAfterDelete(session, persister, repositoryEntity,
transientEntities);
}
}
}
public void OnPostUpdate(PostUpdateEvent @event)
{
if (@event == null) throw new
ArgumentNullException("event");
var entity = @event.Entity as deletableentity;
// Evict any entities that have been set as deleted from
first level cache.
if (entity != null && entity.IsDeleted)
{
@event.Session.Evict(entity);
}
}
Any ideas?
Thank you,
Aleksej
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