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67 lines
1.1 KiB
67 lines
1.1 KiB
"""
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Null Backend
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-------------
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The Null backend does not do any caching at all. It can be
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used to test behavior without caching, or as a means of disabling
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caching for a region that is otherwise used normally.
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.. versionadded:: 0.5.4
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"""
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from ..api import CacheBackend
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from ..api import NO_VALUE
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__all__ = ["NullBackend"]
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class NullLock(object):
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def acquire(self, wait=True):
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return True
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def release(self):
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pass
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def locked(self):
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return False
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class NullBackend(CacheBackend):
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"""A "null" backend that effectively disables all cache operations.
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Basic usage::
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from dogpile.cache import make_region
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region = make_region().configure(
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'dogpile.cache.null'
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)
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"""
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def __init__(self, arguments):
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pass
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def get_mutex(self, key):
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return NullLock()
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def get(self, key):
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return NO_VALUE
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def get_multi(self, keys):
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return [NO_VALUE for k in keys]
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def set(self, key, value):
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pass
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def set_multi(self, mapping):
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pass
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def delete(self, key):
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pass
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def delete_multi(self, keys):
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pass
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