OpenStack Networking (Neutron)
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
from oslo_log import log as logging
from neutron._i18n import _, _LI
from neutron import manager
QOS_DRIVER_NAMESPACE = 'neutron.qos.notification_drivers'
QOS_PLUGIN_OPTS = [
cfg.ListOpt('notification_drivers',
default=['message_queue'],
help=_('Drivers list to use to send the update notification')),
]
cfg.CONF.register_opts(QOS_PLUGIN_OPTS, "qos")
LOG = logging.getLogger(__name__)
class QosServiceNotificationDriverManager(object):
def __init__(self):
self.notification_drivers = []
self._load_drivers(cfg.CONF.qos.notification_drivers)
def update_policy(self, context, qos_policy):
for driver in self.notification_drivers:
driver.update_policy(context, qos_policy)
def delete_policy(self, context, qos_policy):
for driver in self.notification_drivers:
driver.delete_policy(context, qos_policy)
def create_policy(self, context, qos_policy):
for driver in self.notification_drivers:
driver.create_policy(context, qos_policy)
def _load_drivers(self, notification_drivers):
"""Load all the instances of the configured QoS notification drivers
:param notification_drivers: comma separated string
"""
if not notification_drivers:
raise SystemExit(_('A QoS driver must be specified'))
LOG.debug("Loading QoS notification drivers: %s", notification_drivers)
for notification_driver in notification_drivers:
driver_ins = self._load_driver_instance(notification_driver)
self.notification_drivers.append(driver_ins)
def _load_driver_instance(self, notification_driver):
"""Returns an instance of the configured QoS notification driver
:returns: An instance of Driver for the QoS notification
"""
mgr = manager.NeutronManager
driver = mgr.load_class_for_provider(QOS_DRIVER_NAMESPACE,
notification_driver)
driver_instance = driver()
LOG.info(
_LI("Loading %(name)s (%(description)s) notification driver "
"for QoS plugin"),
{"name": notification_driver,
"description": driver_instance.get_description()})
return driver_instance