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#
# Copyright 2014 NEC Corporation. All rights reserved.
#
# 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.
import abc
from oslo_utils import netutils
from stevedore import driver as _driver
from urllib import parse as urlparse
from ceilometer.polling import plugin_base
from ceilometer import sample
class _Base(plugin_base.PollsterBase, metaclass=abc.ABCMeta):
NAMESPACE = 'network.statistics.drivers'
drivers = {}
@property
def default_discovery(self):
# this signifies that the pollster gets its resources from
# elsewhere, in this case they're manually listed in the
# pipeline configuration
return None
@abc.abstractproperty
def meter_name(self):
"""Return a Meter Name."""
@abc.abstractproperty
def meter_type(self):
"""Return a Meter Type."""
@abc.abstractproperty
def meter_unit(self):
"""Return a Meter Unit."""
@staticmethod
def _parse_my_resource(resource):
parse_url = netutils.urlsplit(resource)
params = urlparse.parse_qs(parse_url.query)
parts = urlparse.ParseResult(parse_url.scheme,
parse_url.netloc,
parse_url.path,
None,
None,
None)
return parts, params
@staticmethod
def get_driver(conf, scheme):
if scheme not in _Base.drivers:
_Base.drivers[scheme] = _driver.DriverManager(_Base.NAMESPACE,
scheme).driver(conf)
return _Base.drivers[scheme]
def get_samples(self, manager, cache, resources):
resources = resources or []
for resource in resources:
parse_url, params = self._parse_my_resource(resource)
ext = self.get_driver(self.conf, parse_url.scheme)
sample_data = ext.get_sample_data(self.meter_name,
parse_url,
params,
cache)
for data in sample_data or []:
if data is None:
continue
if not isinstance(data, list):
data = [data]
for (volume, resource_id,
resource_metadata, project_id) in data:
yield sample.Sample(
name=self.meter_name,
type=self.meter_type,
unit=self.meter_unit,
volume=volume,
user_id=None,
project_id=project_id,
resource_id=resource_id,
resource_metadata=resource_metadata
)
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