def fsm_event(self, event, strict=False):
"""Update node_info.state based on a fsm.process_event(event) call.
An AutomatonException triggers an error event.
If strict, node_info.finished(istate.Events.error, error=str(exc))
is called with the AutomatonException instance and a EventError raised.
:param event: an event to process by the fsm
:strict: whether to fail the introspection upon an invalid event
:raises: NodeStateInvalidEvent
"""
with self._fsm_ctx() as fsm:
LOG.debug('Executing fsm(%(state)s).process_event(%(event)s)', {
'state': fsm.current_state,
'event': event
},
node_info=self)
try:
fsm.process_event(event)
except automaton_errors.NotFound as exc:
msg = _('Invalid event: %s') % exc
if strict:
LOG.error(msg, node_info=self)
# assuming an error event is always possible
self.finished(istate.Events.error, error=str(exc))
else:
LOG.warning(msg, node_info=self)
raise utils.NodeStateInvalidEvent(str(exc), node_info=self)
def test_node_in_db_invalid_state(self, fsm_event_mock, add_node_mock):
fsm_event_mock.side_effect = utils.NodeStateInvalidEvent('Oops!')
six.assertRaisesRegex(self, utils.NodeStateInvalidEvent, 'Oops!',
node_cache.start_introspection,
self.node_info.uuid)
self.assertFalse(add_node_mock.called)