[xwiki-devs] Migration Manager Subsystems

Dear XWiki devs Within the scope of our XWiki-based project called celements, we are using several so-called "modules", which consist of JARs, web resources (VM/CSS/JS files) and hibernate mappings. These modules extend the functionality of the base application and can be optionally added if required. We need to update and migrate these modules independently from XWiki. Therefore we require to store individual migration version numbers in the database for each module. XWiki's single implementation of DataMigrationManager, HibernateDataMigrationManager, isn't intended to store multiple version numbers with specific identifiers in the database. There also doesn't seem to be an evident hook from XWiki to seamlessly add own implementations of the DataMigrationManager to the application to allow migration subsystems. Considering the similarities of XWiki extensions to our modules, is there already a way that we have missed to achieve independent migrations of our modules? If not, are there any future plans from XWiki's side to add this functionality? Thanks in advance Marc Sladek synventis gmbh