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quotas.py
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quotas.py
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 OpenStack LLC.
# 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 nova.api.openstack import extensions
from nova.api.openstack import wsgi
from nova.api.openstack import xmlutil
from nova import db
from nova.db.sqlalchemy import api as sqlalchemy_api
from nova import exception
from nova import quota
QUOTAS = quota.QUOTAS
authorize_update = extensions.extension_authorizer('compute', 'quotas:update')
authorize_show = extensions.extension_authorizer('compute', 'quotas:show')
class QuotaTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('quota_set', selector='quota_set')
root.set('id')
for resource in QUOTAS.resources:
elem = xmlutil.SubTemplateElement(root, resource)
elem.text = resource
return xmlutil.MasterTemplate(root, 1)
class QuotaSetsController(object):
def _format_quota_set(self, project_id, quota_set):
"""Convert the quota object to a result dict"""
result = dict(id=str(project_id))
for resource in QUOTAS.resources:
result[resource] = quota_set[resource]
return dict(quota_set=result)
def _validate_quota_limit(self, limit):
# NOTE: -1 is a flag value for unlimited
if limit < -1:
msg = _("Quota limit must be -1 or greater.")
raise webob.exc.HTTPBadRequest(explanation=msg)
def _get_quotas(self, context, id, usages=False):
values = QUOTAS.get_project_quotas(context, id, usages=usages)
if usages:
return values
else:
return dict((k, v['limit']) for k, v in values.items())
@wsgi.serializers(xml=QuotaTemplate)
def show(self, req, id):
context = req.environ['nova.context']
authorize_show(context)
try:
sqlalchemy_api.authorize_project_context(context, id)
return self._format_quota_set(id, self._get_quotas(context, id))
except exception.NotAuthorized:
raise webob.exc.HTTPForbidden()
@wsgi.serializers(xml=QuotaTemplate)
def update(self, req, id, body):
context = req.environ['nova.context']
authorize_update(context)
project_id = id
for key in body['quota_set'].keys():
if key in QUOTAS:
value = int(body['quota_set'][key])
self._validate_quota_limit(value)
try:
db.quota_update(context, project_id, key, value)
except exception.ProjectQuotaNotFound:
db.quota_create(context, project_id, key, value)
except exception.AdminRequired:
raise webob.exc.HTTPForbidden()
return {'quota_set': self._get_quotas(context, id)}
@wsgi.serializers(xml=QuotaTemplate)
def defaults(self, req, id):
context = req.environ['nova.context']
authorize_show(context)
return self._format_quota_set(id, QUOTAS.get_defaults(context))
class Quotas(extensions.ExtensionDescriptor):
"""Quotas management support"""
name = "Quotas"
alias = "os-quota-sets"
namespace = "http://docs.openstack.org/compute/ext/quotas-sets/api/v1.1"
updated = "2011-08-08T00:00:00+00:00"
def get_resources(self):
resources = []
res = extensions.ResourceExtension('os-quota-sets',
QuotaSetsController(),
member_actions={'defaults': 'GET'})
resources.append(res)
return resources