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Diffstat (limited to 'keystone-moon/keystone/common/cache/backends/noop.py')
-rw-r--r-- | keystone-moon/keystone/common/cache/backends/noop.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/keystone-moon/keystone/common/cache/backends/noop.py b/keystone-moon/keystone/common/cache/backends/noop.py new file mode 100644 index 00000000..38329c94 --- /dev/null +++ b/keystone-moon/keystone/common/cache/backends/noop.py @@ -0,0 +1,49 @@ +# Copyright 2013 Metacloud +# +# 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. + +from dogpile.cache import api + + +NO_VALUE = api.NO_VALUE + + +class NoopCacheBackend(api.CacheBackend): + """A no op backend as a default caching backend. + + The no op backend is provided as the default caching backend for keystone + to ensure that ``dogpile.cache.memory`` is not used in any real-world + circumstances unintentionally. ``dogpile.cache.memory`` does not have a + mechanism to cleanup it's internal dict and therefore could cause run-away + memory utilization. + """ + def __init__(self, *args): + return + + def get(self, key): + return NO_VALUE + + def get_multi(self, keys): + return [NO_VALUE for x in keys] + + def set(self, key, value): + return + + def set_multi(self, mapping): + return + + def delete(self, key): + return + + def delete_multi(self, keys): + return |