redis自訂緩衝

標籤：eth   app   elf   func   應該   sed   opened   self   collect   

 1 import weakref, collections 2 import time 3  4  5 class LocalCache(): 6     notFound = object() 7  8     class Dict(dict): 9         def __del__(self):10             pass11 12     def __init__(self,maxlen=20):13         self.weak = weakref.WeakKeyDictionary()14         self.strong=collections.deque(maxlen=maxlen)15 16     @staticmethod17     def nowTime():18         return int(time.time())19 20     def get(self, key):21         # 每個索引值對後面加個欄位到期時間22         # 第一次擷取　expire＝目前時間＋到期時間23         # 非第一次擷取時候，expire判斷是否到期，到期可認為資料沒有找到24         # 到期後應該刪除資料25         value = self.weak.get(key, self.notFound)26         # 沒有到期27         if (value is not self.notFound):28             expire = value[r‘expire‘]29             # 已經到期30             if (self.nowTime() > expire):31                 return self.notFound32             else:33                 return value34         # 到期了－返回沒有找到35         else:36             return self.notFound37     def set(self,key,value):38         self.weak[key]=strongRef=LocalCache.Dict(value)39         self.strong.append(strongRef)40 41 42 from functools import wraps43 44 45 def funcCache(expire=1):46     caches = LocalCache()47 48     def _wrappend(func):49         @wraps(func)50         def __wrapped(*args, **kwargs):51             # 計算出緩衝的key值52             key = str(func) + str(args) + str(kwargs)53 54             result = caches.get(key)55 56             if (result is LocalCache.notFound):57                 result = func(*args, **kwargs)58 59                 caches.set(key, {r‘result‘: result, r‘expire‘: expire + caches.nowTime()})60 61                 result = caches.get(key)62 63             return result64 65         return __wrapped66 67     return _wrappend68 f=funcCache()

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redis自訂緩衝