104 lines
3.4 KiB
Python
104 lines
3.4 KiB
Python
# 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.db.sqlalchemy import api as db_api
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from nova.db.sqlalchemy import api_models
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from nova import exception
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from nova.objects import base
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from nova.objects import fields
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@base.NovaObjectRegistry.register
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class CellMapping(base.NovaTimestampObject, base.NovaObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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fields = {
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'id': fields.IntegerField(read_only=True),
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'uuid': fields.UUIDField(),
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'name': fields.StringField(nullable=True),
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'transport_url': fields.StringField(),
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'database_connection': fields.StringField(),
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}
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@staticmethod
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def _from_db_object(context, cell_mapping, db_cell_mapping):
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for key in cell_mapping.fields:
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setattr(cell_mapping, key, db_cell_mapping[key])
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cell_mapping.obj_reset_changes()
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cell_mapping._context = context
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return cell_mapping
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_uuid_from_db(context, uuid):
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db_mapping = context.session.query(api_models.CellMapping).filter_by(
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uuid=uuid).first()
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if not db_mapping:
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raise exception.CellMappingNotFound(uuid=uuid)
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return db_mapping
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@base.remotable_classmethod
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def get_by_uuid(cls, context, uuid):
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db_mapping = cls._get_by_uuid_from_db(context, uuid)
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return cls._from_db_object(context, cls(), db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _create_in_db(context, updates):
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db_mapping = api_models.CellMapping()
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db_mapping.update(updates)
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db_mapping.save(context.session)
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return db_mapping
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@base.remotable
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def create(self):
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db_mapping = self._create_in_db(self._context, self.obj_get_changes())
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self._from_db_object(self._context, self, db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _save_in_db(context, uuid, updates):
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db_mapping = context.session.query(
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api_models.CellMapping).filter_by(uuid=uuid).first()
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if not db_mapping:
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raise exception.CellMappingNotFound(uuid=uuid)
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db_mapping.update(updates)
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context.session.add(db_mapping)
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return db_mapping
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@base.remotable
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def save(self):
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changes = self.obj_get_changes()
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db_mapping = self._save_in_db(self._context, self.uuid, changes)
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self._from_db_object(self._context, self, db_mapping)
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self.obj_reset_changes()
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@staticmethod
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@db_api.api_context_manager.writer
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def _destroy_in_db(context, uuid):
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result = context.session.query(api_models.CellMapping).filter_by(
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uuid=uuid).delete()
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if not result:
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raise exception.CellMappingNotFound(uuid=uuid)
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@base.remotable
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def destroy(self):
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self._destroy_in_db(self._context, self.uuid)
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