def __init__(self, names, propagate_map_exceptions=False):
        self._mgr = stevedore.NamedExtensionManager(
            namespace=RESOURCE_NAMESPACE,
            names=names,
            propagate_map_exceptions=propagate_map_exceptions,
            invoke_on_load=True)
        if self._mgr.names():
            LOG.warning(_LW(
                'The Extensible Resource Tracker is deprecated and will '
                'be removed in the 14.0.0 release. If you '
                'use this functionality and have custom resources that '
                'are managed by the Extensible Resource Tracker, please '
                'contact the Nova development team by posting to the '
                'openstack-dev mailing list. There is no future planned '
                'support for the tracking of custom resources.'))
        self._log_missing_plugins(names)
Initialise the resource handler by loading the plugins.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/compute/resources/__init__.py/ResourceHandler.__init__