概述
import redis
enable=True
#enable=False
def readRedis(key):
if enable:
r = redis.Redis(host='10.224.38.31',port=8690,db=0,password='xxxx')
val = r.get(key)
if val is None:
print "can not find data for KEY:%s \n" % (key)
return None
else:
print "====Get VALUE from Redis by KEY:%s \n" % ( key)
return pickle.loads(val)
else:
print "disable cache"
def writeRedis(key,val):
r = redis.Redis(host='10.224.38.31',password='xxxx')
if val is None:
print "Val is None,don't save it to redis \n"
else:
r.set(key,pickle.dumps(val) )
r.expire(key,60*60*24*7) #1week
print "====Write value of KEY:%s to redis \n" % (key)
import pickle,functools
def cache(f):
def wrapper(*args,**kwargs):
key = pickle.dumps((f.__name__,args,kwargs)).replace("\n","")
val = readRedis(key)
if val is None:
val = f(*args,**kwargs) # call the wrapped function,save in cache
writeRedis(key,val)
return val # read value from cache
functools.update_wrapper(wrapper,f) # update wrapper's Metadata
return wrapper
@cache
def foo(n):
return n*2
foo(10) # first call with parameter 10,sleeps
foo(10) # returns immediately
foo(15) # returns immediately
foo(19) # returns immediately 总结
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