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OpenStack Study: quota_classes.py**** CubicPower OpenStack Study ****
# Copyright 2012 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. import webob from cinder.api import extensions from cinder.api.openstack import wsgi from cinder.api import xmlutil from cinder import db from cinder import exception from cinder import quota QUOTAS = quota.QUOTAS authorize = extensions.extension_authorizer('volume', 'quota_classes')
**** CubicPower OpenStack Study **** class QuotaClassTemplate(xmlutil.TemplateBuilder):
**** CubicPower OpenStack Study **** def construct(self): root = xmlutil.TemplateElement('quota_class_set', selector='quota_class_set') root.set('id') for resource in QUOTAS.resources: elem = xmlutil.SubTemplateElement(root, resource) elem.text = resource return xmlutil.MasterTemplate(root, 1)
**** CubicPower OpenStack Study **** class QuotaClassSetsController(wsgi.Controller):
**** CubicPower OpenStack Study **** def _format_quota_set(self, quota_class, quota_set): """Convert the quota object to a result dict.""" quota_set['id'] = str(quota_class) return dict(quota_class_set=quota_set) @wsgi.serializers(xml=QuotaClassTemplate)
**** CubicPower OpenStack Study **** def show(self, req, id): context = req.environ['cinder.context'] authorize(context) try: db.sqlalchemy.api.authorize_quota_class_context(context, id) except exception.NotAuthorized: raise webob.exc.HTTPForbidden() return self._format_quota_set(id, QUOTAS.get_class_quotas(context, id)) @wsgi.serializers(xml=QuotaClassTemplate)
**** CubicPower OpenStack Study **** def update(self, req, id, body): context = req.environ['cinder.context'] authorize(context) quota_class = id if not self.is_valid_body(body, 'quota_class_set'): msg = (_("Missing required element quota_class_set" " in request body.")) raise webob.exc.HTTPBadRequest(explanation=msg) for key in body['quota_class_set'].keys(): if key in QUOTAS: try: value = int(body['quota_class_set'][key]) except ValueError: msg = _("Quota class limit must be specified as an" " integer value.") raise webob.exc.HTTPBadRequest(explanation=msg) if value < -1: msg = _("Quota class limit must be -1 or greater.") raise webob.exc.HTTPBadRequest(explanation=msg) try: db.quota_class_update(context, quota_class, key, value) except exception.QuotaClassNotFound: db.quota_class_create(context, quota_class, key, value) except exception.AdminRequired: raise webob.exc.HTTPForbidden() return {'quota_class_set': QUOTAS.get_class_quotas(context, quota_class)}
**** CubicPower OpenStack Study **** class Quota_classes(extensions.ExtensionDescriptor): """Quota classes management support.""" name = "QuotaClasses" alias = "os-quota-class-sets" namespace = ("http://docs.openstack.org/volume/ext/" "quota-classes-sets/api/v1.1") updated = "2012-03-12T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_resources(self): resources = [] res = extensions.ResourceExtension('os-quota-class-sets', QuotaClassSetsController()) resources.append(res) return resources
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