"""
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The cache object API for implementing caches. The default is a thread
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safe in-memory dictionary.
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"""
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from threading import Lock
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class BaseCache(object):
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def get(self, key):
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raise NotImplementedError()
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def set(self, key, value):
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raise NotImplementedError()
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def delete(self, key):
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raise NotImplementedError()
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def close(self):
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pass
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class DictCache(BaseCache):
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def __init__(self, init_dict=None):
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self.lock = Lock()
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self.data = init_dict or {}
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def get(self, key):
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return self.data.get(key, None)
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def set(self, key, value):
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with self.lock:
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self.data.update({key: value})
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def delete(self, key):
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with self.lock:
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if key in self.data:
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self.data.pop(key)
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