Sharding.py 文件源码

def __init__(self, config, timer, db):
        self.config             = config
        self.timer              = timer
        self.db                 = db
        self.balancer_wait_secs = self.config.sharding.balancer.wait_secs
        self.balancer_sleep     = self.config.sharding.balancer.ping_secs

        self.timer_name            = self.__class__.__name__
        self.config_server         = None
        self.config_db             = None
        self.mongos_db             = None
        self._balancer_state_start = None
        self.restored              = False

        # Get a DB connection
        try:
            if isinstance(self.db, DB):
                self.connection = self.db.connection()
                if not self.db.is_mongos() and not self.db.is_configsvr():
                    raise DBOperationError('MongoDB connection is not to a mongos or configsvr!')
            else:
                raise Error("'db' field is not an instance of class: 'DB'!")
        except Exception, e:
            logging.fatal("Could not get DB connection! Error: %s" % e)
            raise DBOperationError(e)