def addListener(self, listener):
""" Add a TaurusListener object in the listeners list.
If it is the first element and Polling is enabled starts the
polling mechanism.
If the listener is already registered nothing happens."""
listeners = self._listeners
initial_subscription_state = self.__subscription_state
ret = TaurusAttribute.addListener(self, listener)
if not ret:
return ret
assert len(listeners) >= 1
if self.__subscription_state == SubscriptionState.Unsubscribed and len(listeners) == 1:
self._subscribeEvents()
# if initial_subscription_state == SubscriptionState.Subscribed:
if len(listeners) > 1 and (
initial_subscription_state == SubscriptionState.Subscribed or self.isPollingActive()
):
sm = self.getSerializationMode()
if sm == TaurusSerializationMode.Concurrent:
Manager().addJob(self.__fireRegisterEvent, None, (listener,))
else:
self.__fireRegisterEvent((listener,))
return ret
def addListener(self, listener):
""" Add a TaurusListener object in the listeners list.
If it is the first listener, it triggers the subscription to
the referenced attributes.
If the listener is already registered nothing happens."""
initial_subscription_state = self.__subscription_state
ret = TaurusAttribute.addListener(self, listener)
if not ret:
return ret
if self.__subscription_state == SubscriptionState.Unsubscribed:
for refobj in self._references:
# subscribe to the referenced attributes
refobj.addListener(self)
self.__subscription_state = SubscriptionState.Subscribed
assert len(self._listeners) >= 1
# if initial_subscription_state == SubscriptionState.Subscribed:
if len(self._listeners) > 1 and \
(initial_subscription_state == SubscriptionState.Subscribed or
self.isPollingActive()):
Manager().addJob(self.__fireRegisterEvent, None, (listener, ))
return ret
def addListener(self, listener):
""" Add a TaurusListener object in the listeners list.
If it is the first listener, it triggers the subscription to
the referenced attributes.
If the listener is already registered nothing happens."""
initial_subscription_state = self.__subscription_state
ret = TaurusAttribute.addListener(self, listener)
if not ret:
return ret
if self.__subscription_state == SubscriptionState.Unsubscribed:
for refobj in self._references:
# subscribe to the referenced attributes
refobj.addListener(self)
self.__subscription_state = SubscriptionState.Subscribed
assert len(self._listeners) >= 1
# if initial_subscription_state == SubscriptionState.Subscribed:
if len(self._listeners) > 1 and \
(initial_subscription_state == SubscriptionState.Subscribed or
self.isPollingActive()):
Manager().addJob(self.__fireRegisterEvent, None, (listener,))
return ret
def addListener(self, listener):
""" Add a TaurusListener object in the listeners list.
If it is the first element and Polling is enabled starts the
polling mechanism.
If the listener is already registered nothing happens."""
listeners = self._listeners
initial_subscription_state = self.__subscription_state
ret = TaurusAttribute.addListener(self, listener)
if not ret:
return ret
assert len(listeners) >= 1
if self.__subscription_state == SubscriptionState.Unsubscribed and len(
listeners) == 1:
self._subscribeEvents()
# if initial_subscription_state == SubscriptionState.Subscribed:
if len(listeners) > 1 and (initial_subscription_state
== SubscriptionState.Subscribed
or self.isPollingActive()):
sm = self.getSerializationMode()
if sm == TaurusSerializationMode.Concurrent:
Manager().addJob(self.__fireRegisterEvent, None, (listener, ))
else:
self.__fireRegisterEvent((listener, ))
return ret
def addListener(self, listener):
added = TaurusAttribute.addListener(self, listener)
if added:
v = self.read()
self.fireEvent(TaurusEventType.Periodic, v, listeners=[listener])
return added
