def run_and_check_output(self, *args, **kwargs):
eventlet_nonblocking_mode = kwargs.pop(
'eventlet_nonblocking_mode', True)
if eventlet_nonblocking_mode:
# We have to make sure that the invoked function as well as the
# subsequent error handling are performed within the same thread.
return _utils.avoid_blocking_call(
self._run_and_check_output, *args, **kwargs)
else:
return self._run_and_check_output(*args, **kwargs)
def run_and_check_output(self, *args, **kwargs):
eventlet_nonblocking_mode = kwargs.pop('eventlet_nonblocking_mode',
True)
if eventlet_nonblocking_mode:
# We have to make sure that the invoked function as well as the
# subsequent error handling are performed within the same thread.
return _utils.avoid_blocking_call(self._run_and_check_output,
*args, **kwargs)
else:
return self._run_and_check_output(*args, **kwargs)
def _listen(self):
while self._running:
try:
# We're using an indefinite timeout here. When the listener is
# closed, this will raise an 'invalid handle value' error,
# which we're going to ignore.
event = _utils.avoid_blocking_call(
self._clusapi_utils.get_cluster_notify_v2,
self._notif_port_h,
timeout_ms=-1)
processed_event = self._process_event(event)
if processed_event:
self._event_queue.put(processed_event)
except Exception:
if self._running:
LOG.exception(
"Unexpected exception in event listener loop. "
"The cluster event listener will now close.")
self._signal_stopped()
