¡@
OpenStack Study: __init__.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012-2013 Rackspace Hosting # All Rights Reserved. # # 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. """ Cell scheduler filters """ from nova import filters from nova.openstack.common import log as logging from nova import policy LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class BaseCellFilter(filters.BaseFilter): """Base class for cell filters."""
**** CubicPower OpenStack Study **** def authorized(self, ctxt): """Return whether or not the context is authorized for this filter based on policy. The policy action is "cells_scheduler_filter: is the name of the filter class. """ name = 'cells_scheduler_filter:' + self.__class__.__name__ target = {'project_id': ctxt.project_id, 'user_id': ctxt.user_id} return policy.enforce(ctxt, name, target, do_raise=False)
**** CubicPower OpenStack Study **** def _filter_one(self, cell, filter_properties): return self.cell_passes(cell, filter_properties)
**** CubicPower OpenStack Study **** def cell_passes(self, cell, filter_properties): """Return True if the CellState passes the filter, otherwise False. Override this in a subclass. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** class CellFilterHandler(filters.BaseFilterHandler):
**** CubicPower OpenStack Study **** def __init__(self): super(CellFilterHandler, self).__init__(BaseCellFilter) def all_filters(): """Return a list of filter classes found in this directory. This method is used as the default for available scheduler filters and should return a list of all filter classes available. """ return CellFilterHandler().get_all_classes()
**** CubicPower OpenStack Study **** def all_filters(): """Return a list of filter classes found in this directory. This method is used as the default for available scheduler filters and should return a list of all filter classes available. """ return CellFilterHandler().get_all_classes()
|