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# 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()
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