bareon_base.py 文件源码

def __init__(self, driver_name):
        self.driver_name = driver_name

        LOG.debug('Loading bareon data-driver "%s"', self.driver_name)
        try:
            manager = stevedore.driver.DriverManager(
                self._namespace, self.driver_name, verify_requirements=True)
            extension = manager[driver_name]
            version = extension.entry_point.dist.version
            version = pkg_resources.parse_version(version)
            LOG.info('Driver %s-%s loaded', extension.name, version)

            if version < self._min_version:
                raise RuntimeError(
                    'bareon version less than {} does not support '
                    'deployment config validation'.format(self._min_version))
        except RuntimeError as e:
            LOG.warning(
                'Fail to load bareon data-driver "%s": %s',
                self.driver_name, e)
            return

        self._driver = manager.driver