Source code for heat.engine.clients.os

#    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
#    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.

import abc

import six

from oslo_cache import core
from oslo_config import cfg

from heat.common import cache

MEMOIZE_EXTENSIONS = core.get_memoization_decorator(

MEMOIZE_FINDER = core.get_memoization_decorator(

[docs]@six.add_metaclass(abc.ABCMeta) class ExtensionMixin(object): def __init__(self, *args, **kwargs): super(ExtensionMixin, self).__init__(*args, **kwargs) self._extensions = None @abc.abstractmethod def _list_extensions(self): return []
[docs] def has_extension(self, alias): """Check if specific extension is present.""" if self._extensions is None: self._extensions = set(self._list_extensions()) return alias in self._extensions