def __setattr__(self, name, value):
if name == 'thread':
if value is None:
if self.id in _task_threads:
del _task_threads[self.id]
else:
_task_threads[self.id] = value
else:
DatabaseObject.__setattr__(self, name, value)
if name == 'state' and value:
Event(volume_id=self.volume_id, type=TASKS_UPDATED)
