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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2013 OpenStack Foundation
#
# 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 nova import db
from nova import exception
from nova.objects import base
from nova.objects import fields
class InstanceGroup(base.NovaPersistentObject, base.NovaObject):
# Version 1.0: Initial version
# Version 1.1: String attributes updated to support unicode
# Version 1.2: Use list/dict helpers for policies, metadetails, members
# Version 1.3: Make uuid a non-None real string
VERSION = '1.3'
fields = {
'id': fields.IntegerField(),
'user_id': fields.StringField(nullable=True),
'project_id': fields.StringField(nullable=True),
'uuid': fields.UUIDField(),
'name': fields.StringField(nullable=True),
'policies': fields.ListOfStringsField(nullable=True),
'metadetails': fields.DictOfStringsField(nullable=True),
'members': fields.ListOfStringsField(nullable=True),
}
@staticmethod
def _from_db_object(context, instance_group, db_inst):
"""Method to help with migration to objects.
Converts a database entity to a formal object.
"""
# Most of the field names match right now, so be quick
for field in instance_group.fields:
if field == 'deleted':
instance_group.deleted = db_inst['deleted'] == db_inst['id']
else:
instance_group[field] = db_inst[field]
instance_group._context = context
instance_group.obj_reset_changes()
return instance_group
@base.remotable_classmethod
def get_by_uuid(cls, context, uuid):
db_inst = db.instance_group_get(context, uuid)
return cls._from_db_object(context, cls(), db_inst)
@base.remotable
def save(self, context):
"""Save updates to this instance group."""
updates = self.obj_get_changes()
if not updates:
return
metadata = None
if 'metadetails' in updates:
metadata = updates.pop('metadetails')
updates.update({'metadata': metadata})
db.instance_group_update(context, self.uuid, updates)
db_inst = db.instance_group_get(context, self.uuid)
self._from_db_object(context, self, db_inst)
@base.remotable
def refresh(self, context):
"""Refreshes the instance group."""
current = self.__class__.get_by_uuid(context, self.uuid)
for field in self.fields:
if self.obj_attr_is_set(field) and self[field] != current[field]:
self[field] = current[field]
self.obj_reset_changes()
@base.remotable
def create(self, context):
if self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='create',
reason='already created')
updates = self.obj_get_changes()
updates.pop('id', None)
policies = updates.pop('policies', None)
members = updates.pop('members', None)
metadetails = updates.pop('metadetails', None)
db_inst = db.instance_group_create(context, updates,
policies=policies,
metadata=metadetails,
members=members)
self._from_db_object(context, self, db_inst)
@base.remotable
def destroy(self, context):
db.instance_group_delete(context, self.uuid)
self.obj_reset_changes()
def _make_instance_group_list(context, inst_list, db_list):
inst_list.objects = []
for group in db_list:
inst_obj = InstanceGroup._from_db_object(context, InstanceGroup(),
group)
inst_list.objects.append(inst_obj)
inst_list.obj_reset_changes()
return inst_list
class InstanceGroupList(base.ObjectListBase, base.NovaObject):
# Version 1.0: Initial version
# InstanceGroup <= version 1.3
VERSION = '1.0'
fields = {
'objects': fields.ListOfObjectsField('InstanceGroup'),
}
child_versions = {
'1.0': '1.3',
# NOTE(danms): InstanceGroup was at 1.3 before we added this
}
@base.remotable_classmethod
def get_by_project_id(cls, context, project_id):
groups = db.instance_group_get_all_by_project_id(context, project_id)
return _make_instance_group_list(context, cls(), groups)
@base.remotable_classmethod
def get_all(cls, context):
groups = db.instance_group_get_all(context)
return _make_instance_group_list(context, cls(), groups)
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