def _load_notifiers(self):
"""One-time load of notifier config file."""
self.routing_groups = {}
self.used_drivers = set()
filename = CONF.routing_notifier_config
if not filename:
return
# Infer which drivers are used from the config file.
self.routing_groups = yaml.load(
self._get_notifier_config_file(filename))
if not self.routing_groups:
self.routing_groups = {} # In case we got None from load()
return
for group in self.routing_groups.values():
self.used_drivers.update(group.keys())
LOG.debug('loading notifiers from %s', self.NOTIFIER_PLUGIN_NAMESPACE)
self.plugin_manager = dispatch.DispatchExtensionManager(
namespace=self.NOTIFIER_PLUGIN_NAMESPACE,
check_func=self._should_load_plugin,
invoke_on_load=True,
invoke_args=None)
if not list(self.plugin_manager):
LOG.warning(_("Failed to load any notifiers for %s"),
self.NOTIFIER_PLUGIN_NAMESPACE)
def test_dispatch():
def check_dispatch(ep, *args, **kwds):
return ep.name == 't2'
def invoke(ep, *args, **kwds):
return (ep.name, args, kwds)
em = dispatch.DispatchExtensionManager(
'stevedore.test.extension',
lambda *args, **kwds: True,
invoke_on_load=True,
invoke_args=('a', ),
invoke_kwds={'b': 'B'},
)
assert len(em.extensions) == 2
assert set(em.names()) == set(['t1', 't2'])
results = em.map(
check_dispatch,
invoke,
'first',
named='named value',
)
expected = [('t2', ('first', ), {'named': 'named value'})]
assert results == expected
def test_dispatch_map_method(self):
em = dispatch.DispatchExtensionManager('stevedore.test.extension',
lambda *args, **kwds: True,
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
results = em.map_method(check_dispatch, 'get_args_and_data', 'first')
self.assertEqual(results, [(('a',), {'b': 'B'}, 'first')])
def test_dispatch(self):
def invoke(ep, *args, **kwds):
return (ep.name, args, kwds)
em = dispatch.DispatchExtensionManager('stevedore.test.extension',
lambda *args, **kwds: True,
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
self.assertEqual(len(em.extensions), 2)
self.assertEqual(set(em.names()), set(['t1', 't2']))
results = em.map(check_dispatch,
invoke,
'first',
named='named value',
)
expected = [('t2', ('first',), {'named': 'named value'})]
self.assertEqual(results, expected)