def restart(self):
logger.warning("Stopping client stack on node {}".format(self))
self.stop()
logger.warning("Starting client stack on node {}".format(self))
self.start()
# Sleep to allow disconnected clients to reconnect before sending replies from the server side.
time.sleep(self.postrestart_wait_time)
def handle_connections_limit(self):
connections_limit_reached_prev = self.connections_limit_reached
self.connections_limit_reached = self.connected_clients_num >= self.max_connected_clients_num
if self.connections_limit_reached:
if not connections_limit_reached_prev:
logger.warning(
'{}: connections limit reached! Actual: {}, limit: {}.'.
format(self, self.connected_clients_num,
self.max_connected_clients_num))
if self.client_stack_restart_enabled:
if self._can_restart():
logger.warning(
'Going to restart client stack {} due to reached connections limit! Actual: {}, limit: {}.'
.format(self, self.connected_clients_num,
self.max_connected_clients_num))
self.restart()
self.init_stack_restart_params()
elif not connections_limit_reached_prev:
logger.warning(
'{}: connections limit reached but too few time spent since client stack start, restart it later.'
.format(self))
elif connections_limit_reached_prev:
logger.warning(
'{}: connections number fell below the limit! Actual: {}, limit: {}.'
.format(self, self.connected_clients_num,
self.max_connected_clients_num))
if self.client_stack_restart_enabled:
logger.warning(
'{}: client stack restart is not needed anymore.'.format(
self))
def handle_listener_events(self):
events = self.get_monitor_events(self.listener_monitor)
for event in events:
logger.trace('{} listener event: {}'.format(self, event))
if event['event'] == zmq.EVENT_ACCEPTED:
self.connected_clients_num += 1
if event['event'] == zmq.EVENT_DISCONNECTED:
assert self.connected_clients_num > 0
if self.connected_clients_num > 0:
self.connected_clients_num -= 1
else:
logger.warning('{}: disconnected event received, but connected clients number is 0'.format(self))
logger.trace('{}: number of connected clients: {}'.format(self, self.connected_clients_num))