# -*- coding: utf-8 -*-
###########################################################################
# Copyright (c), The AiiDA team. All rights reserved. #
# This file is part of the AiiDA code. #
# #
# The code is hosted on GitHub at https://github.com/aiidateam/aiida_core #
# For further information on the license, see the LICENSE.txt file #
# For further information please visit http://www.aiida.net #
###########################################################################
# The next two serve as 'global' variables, set in the load_dbenv
# call. They are properly reset upon forking.
engine = None
scopedsessionclass = None
[docs]def get_scoped_session():
"""
Return a scoped session (according to SQLAlchemy docs,
this returns always the same object within a thread, and
a different object in a different thread.
Moreover, since we update the scopedsessionclass upon
forking, also forks have different session objects.
"""
if scopedsessionclass is None:
s = None
else:
s = scopedsessionclass()
return s