Python實現的redis分散式鎖功能示例
阿新 • • 發佈:2020-01-09
本文例項講述了Python實現的redis分散式鎖功能。分享給大家供大家參考,具體如下:
#!/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): 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): 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 %s called [%s]."%(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(): print "myfunc() called." time.sleep(20) if __name__ == "__main__": myfunc()
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希望本文所述對大家Python程式設計有所幫助。