# -*- encoding: utf-8 -*-
# Copyright 2017 NEC Corporation
#
# 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 watcher.common import exception
from watcher.datasource import base
from watcher.datasource import ceilometer as ceil
from watcher.datasource import gnocchi as gnoc
from watcher.datasource import monasca as mon
class DataSourceManager(object):
def __init__(self, config=None, osc=None):
self.osc = osc
self.config = config
self._ceilometer = None
self._monasca = None
self._gnocchi = None
self.metric_map = base.DataSourceBase.METRIC_MAP
self.datasources = self.config.datasources
@property
def ceilometer(self):
if self._ceilometer is None:
self.ceilometer = ceil.CeilometerHelper(osc=self.osc)
return self._ceilometer
@ceilometer.setter
def ceilometer(self, ceilometer):
self._ceilometer = ceilometer
@property
def monasca(self):
if self._monasca is None:
self._monasca = mon.MonascaHelper(osc=self.osc)
return self._monasca
@monasca.setter
def monasca(self, monasca):
self._monasca = monasca
@property
def gnocchi(self):
if self._gnocchi is None:
self._gnocchi = gnoc.GnocchiHelper(osc=self.osc)
return self._gnocchi
@gnocchi.setter
def gnocchi(self, gnocchi):
self._gnocchi = gnocchi
[docs] def get_backend(self, metrics):
for datasource in self.datasources:
no_metric = False
for metric in metrics:
if (metric not in self.metric_map[datasource] or
self.metric_map[datasource].get(metric) is None):
no_metric = True
break
if not no_metric:
return getattr(self, datasource)
raise exception.NoSuchMetric()
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