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