1) Valentina Server 6.0 have a new feature -- Notifications.
Valentina Server can have many channels. Clients can subscribe to one or few channels and listen them for notification from other clients or VServer itself.
You can read details in the article Notifications in Valentina Server v6.0
2) We have add into WIKI pages about 2 new ADK classes that allow to work with this feature. http://goo.gl/yCB261
3) Please note that we have implement these classes at point '2015-06-25' for V4RB only.