redis_cache.py 文件源码

def cache_it(self, key, f, time_expire):
        if self.debug:
            self.r_server.incr('web2py_cache_statistics:misses')
        cache_set_key = self.cache_set_key
        expire_at = int(time.time() + time_expire) + 120
        bucket_key = "%s:%s" % (cache_set_key, expire_at / 60)
        value = f()
        value_ = pickle.dumps(value, pickle.HIGHEST_PROTOCOL)
        if time_expire == 0:
            time_expire = 1
        self.r_server.setex(key, time_expire, value_)
        # print '%s will expire on %s: it goes in bucket %s' % (key, time.ctime(expire_at))
        # print 'that will expire on %s' % (bucket_key, time.ctime(((expire_at / 60) + 1) * 60))
        p = self.r_server.pipeline()
        # add bucket to the fixed set
        p.sadd(cache_set_key, bucket_key)
        # sets the key
        p.setex(key, time_expire, value_)
        # add the key to the bucket
        p.sadd(bucket_key, key)
        # expire the bucket properly
        p.expireat(bucket_key, ((expire_at / 60) + 1) * 60)
        p.execute()
        return value