xen-org/xen-api — pull request #499 by djs55 (2012-03-13 15:12:57+00:00)
Title: Object-level events: Event.{from,next} now allow per-object registrations

The event registration language is now :=
| *
| class-name
| class-name/object-reference

This will be used for xenopsd to monitor the states of particular VMs (ie those running locally) efficiently, without generating spurious events.