python 装饰器,传递类以及参数
#!/usr/bin/env python # coding=utf-8 import time #import redis class RedisLock(object): def __init__(self, key): #self.rdcon = redis.Redis(host='', port=6379, password="", db=1) self._lock = 0 self.lock_key = "%s_dynamic_test" % key @staticmethod def get_lock(cls,timeout=10): print("get_lock!") ''' while cls._lock != 1: timestamp = time.time() + timeout + 1 cls._lock = cls.rdcon.setnx(cls.lock_key, timestamp) if cls._lock == 1 or (time.time() > cls.rdcon.get(cls.lock_key) and time.time() > cls.rdcon.getset(cls.lock_key, timestamp)): print("get lock") break else: time.sleep(0.3) ''' @staticmethod def release(cls): print("release!") ''' if time.time() < cls.rdcon.get(cls.lock_key): print("release lock") cls.rdcon.delete(cls.lock_key) ''' def deco(cls): def _deco(func): def __deco(*args, **kwargs): print("before {} called [{}].".format(func.__name__, cls)) cls.get_lock(cls) try: return func(*args, **kwargs) finally: cls.release(cls) return __deco return _deco @deco(RedisLock("112233")) def myfunc(i): print(i) print("myfunc() called.") time.sleep(10) if __name__ == "__main__": myfunc(3)
输出
before myfunc called [<__main__.RedisLock object at 0x0000026239D0A7F0>]. get_lock! 3 myfunc() called. release!