def _create_or_update(self, mn_client, cn_client, data_object):
""" Either update the specified pid if it already exists or create a new one.
"""
if not data_object:
raise Exception("data object cannot be null")
if not data_object.pid:
raise Exception("data object must have a pid")
if not data_object.fname:
raise Exception("data object must have a file to write")
if not data_object.meta:
raise Exception("data object must have system metadata")
curr_sysmeta = utils.get_sysmeta_by_pid(data_object.pid, True, cn_client, mn_client)
# Create
if not curr_sysmeta:
with open(utils.expand_path(data_object.fname), "r") as f:
try:
return mn_client.create(data_object.pid, f, data_object.meta)
except DataONEException as e:
raise Exception("Unable to create Science Object on Member Node\n{0}".format(e.friendly_format()))
# Update
else:
data_object.meta.serialVersion = curr_sysmeta.serialVersion + 1
with open(utils.expand_path(data_object.fname), "r") as f:
try:
return mn_client.update(data_object.pid, f, data_object.pid, data_object.meta)
except DataONEException as e:
raise Exception("Unable to update Science Object on Member Node\n{0}".format(e.friendly_format()))
# Nothing good happened.
return None
def _create_object(self, item, mn_client=None, **kwargs):
""" Create an object in DataONE. """
path = utils.expand_path(item.fname)
# cli_util.assert_file_exists(path)
assert os.path.exists(path)
if "format_id" in kwargs:
del kwargs["format_id"]
sysmeta = utils.create_sysmeta_from_path(item.pid, path, format_id=item.format_id, **kwargs)
if mn_client is None:
mn_client = utils.get_d1_mn_client()
with open(path, "r") as f:
try:
result = mn_client.create(item.pid, f, sysmeta)
print 'Created object "%s"' % item.pid
return result
except DataONEException as e:
raise Exception("Unable to create Science Object on Member Node\n{0}".format(e.friendly_format()))
