| # 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. |
| |
| """App Engine memcache based cache for the discovery document.""" |
| |
| import logging |
| |
| # This is only an optional dependency because we only import this |
| # module when google.appengine.api.memcache is available. |
| from google.appengine.api import memcache |
| |
| from . import base |
| from ..discovery_cache import DISCOVERY_DOC_MAX_AGE |
| |
| |
| LOGGER = logging.getLogger(__name__) |
| |
| NAMESPACE = 'google-api-client' |
| |
| |
| class Cache(base.Cache): |
| """A cache with app engine memcache API.""" |
| |
| def __init__(self, max_age): |
| """Constructor. |
| |
| Args: |
| max_age: Cache expiration in seconds. |
| """ |
| self._max_age = max_age |
| |
| def get(self, url): |
| try: |
| return memcache.get(url, namespace=NAMESPACE) |
| except Exception as e: |
| LOGGER.warning(e, exc_info=True) |
| |
| def set(self, url, content): |
| try: |
| memcache.set(url, content, time=int(self._max_age), namespace=NAMESPACE) |
| except Exception as e: |
| LOGGER.warning(e, exc_info=True) |
| |
| cache = Cache(max_age=DISCOVERY_DOC_MAX_AGE) |