187 lines
7.1 KiB
Python
187 lines
7.1 KiB
Python
# coding=utf-8
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#
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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 oslo_utils import strutils
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from oslo_utils import uuidutils
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from iotronic.common import exception
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from iotronic.db import api as dbapi
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from iotronic.objects import base
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from iotronic.objects import utils as obj_utils
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class Chassis(base.IotronicObject):
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# Version 1.0: Initial version
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# Version 1.1: Add get() and get_by_id() and make get_by_uuid()
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# only work with a uuid
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# Version 1.2: Add create() and destroy()
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# Version 1.3: Add list()
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VERSION = '1.3'
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dbapi = dbapi.get_instance()
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fields = {
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'id': int,
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'uuid': obj_utils.str_or_none,
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'extra': obj_utils.dict_or_none,
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'description': obj_utils.str_or_none,
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}
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@staticmethod
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def _from_db_object(chassis, db_chassis):
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"""Converts a database entity to a formal :class:`Chassis` object.
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:param chassis: An object of :class:`Chassis`.
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:param db_chassis: A DB model of a chassis.
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:return: a :class:`Chassis` object.
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"""
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for field in chassis.fields:
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chassis[field] = db_chassis[field]
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chassis.obj_reset_changes()
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return chassis
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@base.remotable_classmethod
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def get(cls, context, chassis_id):
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"""Find a chassis based on its id or uuid and return a Chassis object.
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:param chassis_id: the id *or* uuid of a chassis.
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:returns: a :class:`Chassis` object.
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"""
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if strutils.is_int_like(chassis_id):
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return cls.get_by_id(context, chassis_id)
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elif uuidutils.is_uuid_like(chassis_id):
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return cls.get_by_uuid(context, chassis_id)
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else:
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raise exception.InvalidIdentity(identity=chassis_id)
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@base.remotable_classmethod
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def get_by_id(cls, context, chassis_id):
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"""Find a chassis based on its integer id and return a Chassis object.
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:param chassis_id: the id of a chassis.
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:returns: a :class:`Chassis` object.
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"""
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db_chassis = cls.dbapi.get_chassis_by_id(chassis_id)
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chassis = Chassis._from_db_object(cls(context), db_chassis)
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return chassis
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@base.remotable_classmethod
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def get_by_uuid(cls, context, uuid):
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"""Find a chassis based on uuid and return a :class:`Chassis` object.
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:param uuid: the uuid of a chassis.
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:param context: Security context
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:returns: a :class:`Chassis` object.
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"""
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db_chassis = cls.dbapi.get_chassis_by_uuid(uuid)
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chassis = Chassis._from_db_object(cls(context), db_chassis)
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return chassis
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@base.remotable_classmethod
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def list(cls, context, limit=None, marker=None,
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sort_key=None, sort_dir=None):
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"""Return a list of Chassis objects.
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:param context: Security context.
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:param limit: maximum number of resources to return in a single result.
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:param marker: pagination marker for large data sets.
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:param sort_key: column to sort results by.
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:param sort_dir: direction to sort. "asc" or "desc".
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:returns: a list of :class:`Chassis` object.
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"""
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db_chassis = cls.dbapi.get_chassis_list(limit=limit,
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marker=marker,
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sort_key=sort_key,
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sort_dir=sort_dir)
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return [Chassis._from_db_object(cls(context), obj)
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for obj in db_chassis]
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@base.remotable
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def create(self, context=None):
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"""Create a Chassis record in the DB.
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Column-wise updates will be made based on the result of
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self.what_changed(). If target_power_state is provided,
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it will be checked against the in-database copy of the
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chassis before updates are made.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Chassis(context)
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"""
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values = self.obj_get_changes()
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db_chassis = self.dbapi.create_chassis(values)
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self._from_db_object(self, db_chassis)
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@base.remotable
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def destroy(self, context=None):
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"""Delete the Chassis from the DB.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Chassis(context)
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"""
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self.dbapi.destroy_chassis(self.uuid)
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self.obj_reset_changes()
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@base.remotable
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def save(self, context=None):
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"""Save updates to this Chassis.
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Updates will be made column by column based on the result
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of self.what_changed().
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Chassis(context)
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"""
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updates = self.obj_get_changes()
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self.dbapi.update_chassis(self.uuid, updates)
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self.obj_reset_changes()
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@base.remotable
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def refresh(self, context=None):
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"""Loads and applies updates for this Chassis.
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Loads a :class:`Chassis` with the same uuid from the database and
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checks for updated attributes. Updates are applied from
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the loaded chassis column by column, if there are any updates.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Chassis(context)
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"""
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current = self.__class__.get_by_uuid(self._context, uuid=self.uuid)
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for field in self.fields:
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if (hasattr(self, base.get_attrname(field)) and
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self[field] != current[field]):
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self[field] = current[field]
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