43 lines
1.1 KiB
Python
43 lines
1.1 KiB
Python
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from collections import OrderedDict
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from django.core.cache import cache
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class NoneFromCache:
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pass
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class LocalCacheProxy:
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# django cache, buffered using a LRU cache
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# only usable for stuff that never changes, obviously
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def __init__(self, maxsize=128):
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self._maxsize = maxsize
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self._items = OrderedDict()
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def get(self, key, default=None):
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print('get')
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try:
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# first check out cache
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result = self._items[key]
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except KeyError:
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# not in our cache
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result = cache.get(key, default=NoneFromCache)
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if result is not NoneFromCache:
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self._items[key] = result
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self._prune()
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else:
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result = default
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else:
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self._items.move_to_end(key, last=True)
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return result
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def _prune(self):
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# remove old items
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while len(self._items) > self._maxsize:
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self._items.pop(next(iter(self._items.keys())))
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def set(self, key, value, expire):
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cache.set(key, value, expire)
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self._items[key] = value
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self._prune()
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