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# Copyright (C) 2014 eNovance SAS <>
# 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
# 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 neutron_lib.api import extensions
from neutron_lib import constants as consts
from neutron_lib.plugins import constants as plugin_constants
from neutron_lib.plugins import directory
from oslo_log import log as logging
import oslo_messaging
LOG = logging.getLogger(__name__)
class MeteringRpcCallbacks(object):
target = oslo_messaging.Target(version='1.0')
def __init__(self, meter_plugin):
self.meter_plugin = meter_plugin
def get_sync_data_metering(self, context, **kwargs):
l3_plugin = directory.get_plugin(plugin_constants.L3)
if not l3_plugin:
metering_data = self.meter_plugin.get_sync_data_metering(context)
host = kwargs.get('host')
if not extensions.is_extension_supported(
l3_plugin, consts.L3_AGENT_SCHEDULER_EXT_ALIAS) or not host:
return metering_data
agents = l3_plugin.get_l3_agents(context, filters={'host': [host]})
if not agents:
LOG.error('Unable to find agent on host %s.', host)
router_ids = []
for agent in agents:
routers = l3_plugin.list_routers_on_l3_agent(context,
router_ids += [router['id'] for router in routers['routers']]
if not router_ids:
return [
router for router in metering_data
if router['id'] in router_ids