def __init__(self, pilot_data_service=None, data_unit_description=None, du_url=None):
"""
1.) create a new Pilot Data: pilot_data_service and data_unit_description required
2.) reconnect to an existing Pilot Data: du_url required
"""
if du_url==None:
self.id = self.DU_ID_PREFIX + str(uuid.uuid1())
self.data_unit_description = data_unit_description
self.pilot_data=[]
self.url = CoordinationAdaptor.add_du(pilot_data_service.url, self)
self.state = State.New
self.data_unit_items = DataUnitItem.create_data_unit_list(self, self.data_unit_description["file_urls"])
CoordinationAdaptor.update_du(self)
else:
self.id = self.__get_du_id(du_url)
self.url = du_url
logger.debug("Restore du: %s"%self.id)
self.__restore_state()
self.transfer_threads=[]
