# where this service is running.
self.udp_server = UDPServer(MULTICAST_GROUP, lambda *args, **keys: ThreadedUDPMulticastRequestHandler(
UDPObservableSingleton.instance.observable.update_received_list,
host_ip, self._sending_thread.expand_timeout, *args, **keys))
self._receiver_thread = Thread(target=self.udp_server.serve_forever, daemon=True)
self._logger = Log.get_logger(self.__class__.__name__)
def start(self):
if not self._sending_thread.is_alive():
self._logger.info("Started SenderThread.")
self._sending_thread.start()
if not self._receiver_thread.is_alive():
self._logger.info("Started UDPServer.")
self._receiver_thread.start()
def stop(self):
if self._sending_thread.is_alive():
self._logger.info("Stopping SenderThread...")
self._sending_thread.stop()
if self._receiver_thread.is_alive():
self._logger.info("Stopping UDPServer...")
self.udp_server.shutdown()
self.udp_server.server_close()
synchronize(UDPUpdateObseravable, "add_observer remove_observer notify_observers" +
"set_changed clear_changed has_changed update_received_list")
if self.has_changed():
return
tmp_copy = self._observers.copy()
self.clear_changed()
for x in tmp_copy:
x.update(self, arg)
def update_private_data(self):
private_data = random.randint(0, 10)
self.notify_observers(private_data)
synchronize(ObservableImplementation, "add_observer remove_observer notify_observers" +
"set_changed clear_changed has_changed")
# end class
class ObserverInterface(metaclass=ABCMeta):
"""Observer pattern: Observer interface"""
@abstractmethod
def update(self, observable, arg):
pass
# end class
class Observer(ObserverInterface):
def __str__(self):
"""Shall return a string representation of the _dict attribute.
:return: string representation of the _dict attribute.
"""
rtn = ''
cpy_dict = self._dict.copy()
for k in iter(cpy_dict):
rtn = (rtn + "{0}:\n {1}").format(k, str(cpy_dict[k]))
return rtn
synchronize(ListHandler, "add_or_override_entry rmv_entry get_entry to_json decode")
class Entry(object):
"""This class holds the attributes of a host within the network.
"""
def __init__(self, is_master=False, pyro_uri="", last_time_active=-1):
"""Shall initialize the attributes with the given (default-) parameters.
:param is_master: defines if is this entry a master node
:param pyro_uri: the pyro uri of this entry
:param last_time_active: the timestamp of the last activity received from the remote host.
:return: None
"""
