Python实现的redis分布式锁功能示例

本文实例讲述了Python实现的redis分布式锁功能。分享给大家供大家参考，具体如下：

#!/usr/bin/env python# coding=utf-8import timeimport redisclass 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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希望本文所述对大家Python程序设计有所帮助。