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OpenStack Study: availability_zones.py**** CubicPower OpenStack Study ****
# Copyright (c) 2013 OpenStack Foundation # 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. from cinder.api import extensions from cinder.api.openstack import wsgi import cinder.api.views.availability_zones from cinder.api import xmlutil import cinder.exception import cinder.volume.api
**** CubicPower OpenStack Study **** def make_availability_zone(elem): elem.set('name', 'zoneName') zoneStateElem = xmlutil.SubTemplateElement(elem, 'zoneState', selector='zoneState') zoneStateElem.set('available')
**** CubicPower OpenStack Study **** class ListTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('availabilityZones') elem = xmlutil.SubTemplateElement(root, 'availabilityZone', selector='availabilityZoneInfo') make_availability_zone(elem) alias = Availability_zones.alias namespace = Availability_zones.namespace return xmlutil.MasterTemplate(root, 1, nsmap={alias: namespace})
**** CubicPower OpenStack Study **** class Controller(wsgi.Controller): _view_builder_class = cinder.api.views.availability_zones.ViewBuilder
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(Controller, self).__init__(*args, **kwargs) self.volume_api = cinder.volume.api.API() @wsgi.serializers(xml=ListTemplate)
**** CubicPower OpenStack Study **** def index(self, req): """Describe all known availability zones.""" azs = self.volume_api.list_availability_zones() return self._view_builder.list(req, azs)
**** CubicPower OpenStack Study **** class Availability_zones(extensions.ExtensionDescriptor): """Describe Availability Zones.""" name = 'AvailabilityZones' alias = 'os-availability-zone' namespace = ('http://docs.openstack.org/volume/ext/' 'os-availability-zone/api/v1') updated = '2013-06-27T00:00:00+00:00'
**** CubicPower OpenStack Study **** def get_resources(self): controller = Controller() res = extensions.ResourceExtension(Availability_zones.alias, controller) return [res]
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