def run(self):
"A simple loop checking for changes to the attribute list"
# "batching" the updates should be more efficient than
# reacting immediately, especially when listeners can come and
# go quite frequently.
while not self.stopped.is_set():
sleep(self.period)
if self._attributes:
attributes, self._attributes = self._attributes, CaselessList()
with self.lock:
self._update(attributes)
def __init__(self, event_callback, unsubscribe_callback, period=0.5):
QtCore.QThread.__init__(self)
self.listeners = CaselessDict()
self.inverse_listeners = {}
self.event_callback = event_callback
self.unsubscribe_callback = unsubscribe_callback
self.period = period
self._attributes = CaselessList()
self._config = CaselessDict()
self._last_event = TTLDict(default_ttl=10)
self.attribute_validator = TangoAttributeNameValidator()
self.device_validator = TangoDeviceNameValidator()
self.eval_validator = EvaluationAttributeNameValidator()
self.lock = Lock()
self.stopped = Event()
