50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
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# Copyright 2014 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Caching utility for the discovery document."""
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from __future__ import absolute_import
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import logging
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import datetime
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import os
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LOGGER = logging.getLogger(__name__)
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DISCOVERY_DOC_MAX_AGE = 60 * 60 * 24 # 1 day
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def autodetect():
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"""Detects an appropriate cache module and returns it.
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Returns:
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googleapiclient.discovery_cache.base.Cache, a cache object which
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is auto detected, or None if no cache object is available.
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"""
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if 'APPENGINE_RUNTIME' in os.environ:
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try:
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from google.appengine.api import memcache
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from . import appengine_memcache
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return appengine_memcache.cache
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except Exception:
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pass
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try:
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from . import file_cache
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return file_cache.cache
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except Exception as e:
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LOGGER.warning(e, exc_info=True)
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return None
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