def _replace_device(self):
"""Replace the nonexistent device with a new one.
If something has changed but the device does not exist,
there is no need to schedule actions on the device. It
is only necessary to create a new device object which
reflects the current choices.
"""
log.debug("Replacing a nonexistent device.")
device = self._device
if self._should_remove_device():
# Remove the current device.
destroy_device(self._storage, device)
# We don't want to pass the device if we removed it.
self._request.device_spec = ""
# Create a new device.
log.debug("Creating a new device.")
arguments = get_device_factory_arguments(self._storage, self._request)
device = self._storage.factory_device(**arguments)
# Update the device.
self._device = device
def destroy_device(self, device_name):
"""Destroy the specified device in the storage model.
:param device_name: a name of the device
:raise: StorageConfigurationError in case of failure
"""
device = self._get_device(device_name)
utils.destroy_device(self.storage, device)
def reset_device(self, device_name):
"""Reset the specified device in the storage model.
FIXME: Merge with destroy_device.
:param device_name: a name of the device
:raise: StorageConfigurationError in case of failure
"""
device = self._get_device(device_name)
if device.exists:
# Revert changes done to an existing device.
self.storage.reset_device(device)
else:
# Destroy a non-existing device.
utils.destroy_device(self.storage, device)
