def add_extension(self, ext):
ext = ext.obj
# Do nothing if the extension doesn't check out
if not self._check_extension(ext):
return
alias = ext.get_alias()
LOG.debug('Loaded extension: %s', alias)
if alias in self.extensions:
raise exception.Error("Found duplicate extension: %s" % alias)
self.extensions[alias] = ext
def add_driver_extension(self, extension):
# Add a module driver from the extension.
# If the stevedore manager is changed to one that doesn't
# check the extension driver, then it should be done manually here
# by calling self._check_extension(extension)
driver = extension.obj
driver_type = driver.get_type()
LOG.info('Loaded module driver: %s', driver_type)
if driver_type in self._drivers:
raise exception.Error(
_("Found duplicate driver: %s") % driver_type)
self._drivers[driver_type] = driver
