| # Copyright 2014 Google Inc. 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. |
| |
| """An abstract class for caching the discovery document.""" |
| |
| import abc |
| |
| |
| class Cache(object): |
| """A base abstract cache class.""" |
| __metaclass__ = abc.ABCMeta |
| |
| @abc.abstractmethod |
| def get(self, url): |
| """Gets the content from the memcache with a given key. |
| |
| Args: |
| url: string, the key for the cache. |
| |
| Returns: |
| object, the value in the cache for the given key, or None if the key is |
| not in the cache. |
| """ |
| raise NotImplementedError() |
| |
| @abc.abstractmethod |
| def set(self, url, content): |
| """Sets the given key and content in the cache. |
| |
| Args: |
| url: string, the key for the cache. |
| content: string, the discovery document. |
| """ |
| raise NotImplementedError() |