204 lines
7.9 KiB
Python
204 lines
7.9 KiB
Python
# Copyright 2015 IBM Corp.
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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 magnum.common import exception
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from magnum.common import utils
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from magnum.db import api as dbapi
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from magnum.objects import base
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from magnum.objects import utils as obj_utils
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class ReplicationController(base.MagnumObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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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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'name': obj_utils.str_or_none,
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'project_id': obj_utils.str_or_none,
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'user_id': obj_utils.str_or_none,
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'images': obj_utils.list_or_none,
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'bay_uuid': obj_utils.str_or_none,
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'labels': obj_utils.dict_or_none,
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'replicas': obj_utils.int_or_none,
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'manifest_url': obj_utils.str_or_none,
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'manifest': obj_utils.str_or_none,
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}
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@staticmethod
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def _from_db_object(rc, db_rc):
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"""Converts a database entity to a formal object."""
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for field in rc.fields:
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# ignore manifest_url as it was used for create rc
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if field == 'manifest_url':
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continue
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# ignore manifest as it was used for create rc
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if field == 'manifest':
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continue
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rc[field] = db_rc[field]
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rc.obj_reset_changes()
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return rc
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@staticmethod
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def _from_db_object_list(db_objects, cls, context):
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"""Converts a list of database entities to a list of formal objects."""
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return [ReplicationController._from_db_object(cls(context),
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obj) for obj in db_objects]
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@base.remotable_classmethod
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def get(cls, context, rc_id):
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"""Find a ReplicationController based on its id or uuid and return a
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replication controller object.
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:param rc_id: the id *or* uuid of a ReplicationController.
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:returns: a :class:`ReplicationController` object.
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"""
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if utils.is_int_like(rc_id):
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return cls.get_by_id(context, rc_id)
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elif utils.is_uuid_like(rc_id):
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return cls.get_by_uuid(context, rc_id)
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else:
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raise exception.InvalidIdentity(identity=rc_id)
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@base.remotable_classmethod
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def get_by_id(cls, context, rc_id):
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"""Find a ReplicationController based on its integer id and return a
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ReplicationController object.
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:param rc_id: the id of a ReplicationController.
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:returns: a :class:`ReplicationController` object.
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"""
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db_rc = cls.dbapi.get_rc_by_id(context, rc_id)
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rc = ReplicationController._from_db_object(cls(context), db_rc)
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return rc
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@base.remotable_classmethod
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def get_by_uuid(cls, context, uuid):
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"""Find a ReplicationController based on uuid and return
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a :class:`ReplicationController` object.
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:param uuid: the uuid of a ReplicationController.
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:param context: Security context
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:returns: a :class:`ReplicationController` object.
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"""
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db_rc = cls.dbapi.get_rc_by_uuid(context, uuid)
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rc = ReplicationController._from_db_object(cls(context), db_rc)
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return rc
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@base.remotable_classmethod
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def get_by_name(cls, context, name):
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"""Find a ReplicationController based on name and return
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a :class:`ReplicationController` object.
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:param name: the name of a ReplicationController.
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:param context: Security context
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:returns: a :class:`ReplicationController` object.
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"""
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db_rc = cls.dbapi.get_rc_by_name(name)
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rc = ReplicationController._from_db_object(cls(context), db_rc)
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return rc
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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 ReplicationController 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:`ReplicationController` object.
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"""
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db_rcs = cls.dbapi.get_rc_list(context, 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 ReplicationController._from_db_object_list(db_rcs, cls, context)
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@base.remotable
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def create(self, context=None):
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"""Create a ReplicationController record in 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.: ReplicationController(context)
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"""
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values = self.obj_get_changes()
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db_rc = self.dbapi.create_rc(values)
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self._from_db_object(self, db_rc)
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@base.remotable
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def destroy(self, context=None):
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"""Delete the ReplicationController 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.: ReplicationController(context)
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"""
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self.dbapi.destroy_rc(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 ReplicationController.
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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.: ReplicationController(context)
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"""
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updates = self.obj_get_changes()
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self.dbapi.update_rc(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 updates for this ReplicationController.
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Loads a rc 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 rc 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.: ReplicationController(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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