I'm trying to understand why and when MBeans are persisted into the nuke_services and nuke_services_attributes tables.

I already got, that JDBCPersistanceManager is the class to achieve that.

The phenomenom I get is that when I create a new block, it is persisted into these tables, but if I change something later, it is not persisted anymore.

Does the Module dealing with the settings (in this case the BlockModule) have to advise the changed MBean to store the changed information, or does the MBean (Block) has to explicitely call store() on itself if attributes have changed -- or is everything happening in the jboss.mx package in the background my magic?