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OpenStack Study: migration.py**** CubicPower OpenStack Study ****
# # 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 from nova.objects import instance as instance_obj
**** CubicPower OpenStack Study **** class Migration(base.NovaPersistentObject, base.NovaObject): # Version 1.0: Initial version # Version 1.1: String attributes updated to support unicode VERSION = '1.1' fields = { 'id': fields.IntegerField(), 'source_compute': fields.StringField(nullable=True), 'dest_compute': fields.StringField(nullable=True), 'source_node': fields.StringField(nullable=True), 'dest_node': fields.StringField(nullable=True), 'dest_host': fields.StringField(nullable=True), 'old_instance_type_id': fields.IntegerField(nullable=True), 'new_instance_type_id': fields.IntegerField(nullable=True), 'instance_uuid': fields.StringField(nullable=True), 'status': fields.StringField(nullable=True), } @staticmethod
**** CubicPower OpenStack Study **** def _from_db_object(context, migration, db_migration): for key in migration.fields: migration[key] = db_migration[key] migration._context = context migration.obj_reset_changes() return migration @base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_id(cls, context, migration_id): db_migration = db.migration_get(context, migration_id) return cls._from_db_object(context, cls(), db_migration) @base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_instance_and_status(cls, context, instance_uuid, status): db_migration = db.migration_get_by_instance_and_status( context, instance_uuid, status) return cls._from_db_object(context, cls(), db_migration) @base.remotable
**** CubicPower OpenStack Study **** 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) db_migration = db.migration_create(context, updates) self._from_db_object(context, self, db_migration) @base.remotable
**** CubicPower OpenStack Study **** def save(self, context): updates = self.obj_get_changes() updates.pop('id', None) db_migration = db.migration_update(context, self.id, updates) self._from_db_object(context, self, db_migration) self.obj_reset_changes() @property
**** CubicPower OpenStack Study **** def instance(self): return instance_obj.Instance.get_by_uuid(self._context, self.instance_uuid)
**** CubicPower OpenStack Study **** class MigrationList(base.ObjectListBase, base.NovaObject): # Version 1.0: Initial version # Migration <= 1.1 # Version 1.1: Added use_slave to get_unconfirmed_by_dest_compute VERSION = '1.1' fields = { 'objects': fields.ListOfObjectsField('Migration'), } child_versions = { '1.0': '1.1', # NOTE(danms): Migration was at 1.1 before we added this '1.1': '1.1', } @base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_unconfirmed_by_dest_compute(cls, context, confirm_window, dest_compute, use_slave=False): db_migrations = db.migration_get_unconfirmed_by_dest_compute( context, confirm_window, dest_compute, use_slave=use_slave) return base.obj_make_list(context, MigrationList(), Migration, db_migrations) @base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_in_progress_by_host_and_node(cls, context, host, node): db_migrations = db.migration_get_in_progress_by_host_and_node( context, host, node) return base.obj_make_list(context, MigrationList(), Migration, db_migrations) @base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_filters(cls, context, filters): db_migrations = db.migration_get_all_by_filters(context, filters) return base.obj_make_list(context, MigrationList(), Migration, db_migrations)
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