【python】使用redis pool的一种单例实现方式

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为适应多个redis实例共享同一个连接池的场景，可以类似于以下单例方式实现:

import redisclass RedisDBConfig:    HOST = '127.0.0.1'    PORT = 6379    DBID = 0def operator_status(func):    '''get operatoration status    '''    def gen_status(*args, **kwargs):        error, result = None, None        try:            result = func(*args, **kwargs)        except Exception as e:            error = str(e)        return {'result': result, 'error':  error}    return gen_statusclass RedisCache(object):    def __init__(self):        if not hasattr(RedisCache, 'pool'):            RedisCache.create_pool()        self._connection = redis.Redis(connection_pool = RedisCache.pool)    @staticmethod    def create_pool():        RedisCache.pool = redis.ConnectionPool(                host = RedisDBConfig.HOST,                port = RedisDBConfig.PORT,                db   = RedisDBConfig.DBID)    @operator_status    def set_data(self, key, value):        '''set data with (key, value)        '''        return self._connection.set(key, value)    @operator_status    def get_data(self, key):        '''get data by key        '''        return self._connection.get(key)    @operator_status    def del_data(self, key):        '''delete cache by key        '''        return self._connection.delete(key)if __name__ == '__main__':    print RedisCache().set_data('Testkey', "Simple Test")    print RedisCache().get_data('Testkey')    print RedisCache().del_data('Testkey')    print RedisCache().get_data('Testkey')

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