120 lines
3.8 KiB
Python
120 lines
3.8 KiB
Python
# Copyright 2013 Rackspace Hosting.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from nova.objects import base
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from nova.objects import fields
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from nova import quota
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def ids_from_instance(context, instance):
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if (context.is_admin and
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context.project_id != instance['project_id']):
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project_id = instance['project_id']
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else:
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project_id = context.project_id
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if context.user_id != instance['user_id']:
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user_id = instance['user_id']
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else:
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user_id = context.user_id
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return project_id, user_id
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# TODO(lyj): This method needs to be cleaned up once the
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# ids_from_instance helper method is renamed or some common
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# method is added for objects.quotas.
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def ids_from_security_group(context, security_group):
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return ids_from_instance(context, security_group)
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class Quotas(base.NovaObject):
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fields = {
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'reservations': fields.ListOfStringsField(nullable=True),
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'project_id': fields.StringField(nullable=True),
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'user_id': fields.StringField(nullable=True),
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}
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def __init__(self):
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super(Quotas, self).__init__()
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# Set up defaults.
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self.reservations = []
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self.project_id = None
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self.user_id = None
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self.obj_reset_changes()
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@classmethod
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def from_reservations(cls, context, reservations, instance=None):
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"""Transitional for compatibility."""
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if instance is None:
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project_id = None
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user_id = None
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else:
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project_id, user_id = ids_from_instance(context, instance)
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quotas = cls()
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quotas._context = context
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quotas.reservations = reservations
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quotas.project_id = project_id
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quotas.user_id = user_id
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quotas.obj_reset_changes()
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return quotas
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@base.remotable
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def reserve(self, context, expire=None, project_id=None, user_id=None,
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**deltas):
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reservations = quota.QUOTAS.reserve(context, expire=expire,
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project_id=project_id,
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user_id=user_id,
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**deltas)
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self.reservations = reservations
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self.project_id = project_id
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self.user_id = user_id
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self.obj_reset_changes()
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@base.remotable
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def commit(self, context=None):
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if not self.reservations:
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return
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if context is None:
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context = self._context
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quota.QUOTAS.commit(context, self.reservations,
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project_id=self.project_id,
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user_id=self.user_id)
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self.reservations = None
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self.obj_reset_changes()
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@base.remotable
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def rollback(self, context=None):
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"""Rollback quotas."""
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if not self.reservations:
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return
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if context is None:
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context = self._context
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quota.QUOTAS.rollback(context, self.reservations,
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project_id=self.project_id,
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user_id=self.user_id)
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self.reservations = None
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self.obj_reset_changes()
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class QuotasNoOp(Quotas):
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def reserve(context, expire=None, project_id=None, user_id=None,
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**deltas):
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pass
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def commit(self, context=None):
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pass
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def rollback(self, context=None):
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pass
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