[hibernate-dev] Hibernate5 migration

Hi, I'm migrating from Hibernate4 to 5(RC4). While doing so I'm stumbling on some stuff that has been removed or moved. - In Hibernate4 we modified mappings on-the-fly by overriding Spring's LocalSessionFactoryBean#buildSessionFactory. Doing so we could first access the getClassMapping on org.hibernate.cfg.Configuration before letting the SF actually build. However, in Hibernate5 the metadata access has been refactored and is no longer part of the Configuration. Should we use MetadataContributor instead for these purposes? - Is there a way to register MetadataContributor dynamically? I see that it is being loaded using Java's ServiceLoader. However, I need some programmatic API access to enable or disable the Contributor (for example based on Spring profiles). - For JTA integration we were using org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory, but this class is no longer present. Also in org.hibernate.cfg.AvailableSettings the key that was used (hibernate.transaction.factory_class) to configure the factory is also removed. Is hibernate.transaction.coordinator_class the new key we should be using instead with org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordi natorImpl as value for JTA? Do we need to configure anything special in case of resource local TX or is JdbcResourceLocalTransactionCoordinatorImpl the default? - generateDropSchemaScript and generateSchemaCreationScript have been removed from Configuration. Is there a way to access this in another way? Thanks Koen.