¡@
OpenStack Study: __init__.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 exception from nova.openstack.common.gettextutils import _ from nova.openstack.common import log as logging LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class LoadedExtensionInfo(object): """Keep track of all loaded API extensions."""
**** CubicPower OpenStack Study **** def __init__(self): self.extensions = {}
**** CubicPower OpenStack Study **** def register_extension(self, ext): if not self._check_extension(ext): return False alias = ext.alias LOG.audit(_("Loaded extension %s"), alias) if alias in self.extensions: raise exception.NovaException("Found duplicate extension: %s" % alias) self.extensions[alias] = ext return True
**** CubicPower OpenStack Study **** def _check_extension(self, extension): """Checks for required methods in extension objects.""" try: LOG.debug(_('Ext name: %s'), extension.name) LOG.debug(_('Ext alias: %s'), extension.alias) LOG.debug(_('Ext description: %s'), ' '.join(extension.__doc__.strip().split())) LOG.debug(_('Ext version: %i'), extension.version) except AttributeError as ex: LOG.exception(_("Exception loading extension: %s"), unicode(ex)) return False return True
**** CubicPower OpenStack Study **** def get_extensions(self): return self.extensions
|