def unregister_listener(self, listener):
"""Remove a listener callback added with register_listener().
Parameters
----------
listener : function
Reference to the callback function that should be removed
"""
listener_id = hashable_identity(listener)
self._listeners.pop(listener_id, None)
def unregister_listener(self, listener):
"""Remove a listener callback added with register_listener().
Parameters
----------
listener : function
Reference to the callback function that should be removed
"""
listener_id = hashable_identity(listener)
self._listeners.pop(listener_id, None)
def register_listener(self, listener, reading=False):
"""Add a callback function that is called when sensor value is updated.
The callback footprint is received_timestamp, timestamp, status, value.
Parameters
----------
listener : function
Callback signature: if reading
listener(katcp_sensor, reading) where
`katcp_sensor` is this KATCPSensor instance
`reading` is an instance of :class:`KATCPSensorReading`
Callback signature: default, if not reading
listener(received_timestamp, timestamp, status, value)
"""
listener_id = hashable_identity(listener)
self._listeners[listener_id] = (listener, reading)
def register_listener(self, listener, reading=False):
"""Add a callback function that is called when sensor value is updated.
The callback footprint is received_timestamp, timestamp, status, value.
Parameters
----------
listener : function
Callback signature: if reading
listener(katcp_sensor, reading) where
`katcp_sensor` is this KATCPSensor instance
`reading` is an instance of :class:`KATCPSensorReading`
Callback signature: default, if not reading
listener(received_timestamp, timestamp, status, value)
"""
listener_id = hashable_identity(listener)
self._listeners[listener_id] = (listener, reading)
logger.debug('Register listener for {}'.format(self.name))
def test_hashable_identity(self):
class MyObject(object):
def my_method(self):
pass
def my_func1():
pass
def my_func2():
pass
obj1 = MyObject()
obj2 = MyObject()
hash1 = hashable_identity(obj1)
hash1_again = hashable_identity(obj1)
hash2 = hashable_identity(obj2)
self.assertEqual(hash1, hash1_again)
self.assertNotEqual(hash1, hash2)
hash1 = hashable_identity(obj1.my_method)
hash1_again = hashable_identity(obj1.my_method)
hash2 = hashable_identity(obj2.my_method)
self.assertEqual(hash1, hash1_again)
self.assertNotEqual(hash1, hash2)
hash1 = hashable_identity(my_func1)
hash1_again = hashable_identity(my_func1)
hash2 = hashable_identity(my_func2)
self.assertEqual(hash1, hash1_again)
self.assertNotEqual(hash1, hash2)
hash1 = hashable_identity('baz')
hash1_again = hashable_identity('baz')
hash2 = hashable_identity('foo')
self.assertEqual(hash1, hash1_again)
self.assertNotEqual(hash1, hash2)
def is_listener(self, listener):
listener_id = hashable_identity(listener)
return listener_id in self._listeners
def is_listener(self, listener):
listener_id = hashable_identity(listener)
return listener_id in self._listeners
