Source code for alignak.autoslots
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2015-2015: Alignak team, see AUTHORS.txt file for contributors
#
# This file is part of Alignak.
#
# Alignak is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Alignak is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Alignak. If not, see <http://www.gnu.org/licenses/>.
#
#
# This file incorporates work covered by the following copyright and
# permission notice:
#
# Copyright (C) 2009-2014:
# Grégory Starck, g.starck@gmail.com
# Hartmut Goebel, h.goebel@goebel-consult.de
# Jean Gabes, naparuba@gmail.com
# Zoran Zaric, zz@zoranzaric.de
# Sebastien Coavoux, s.coavoux@free.fr
# This file is part of Shinken.
#
# Shinken is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Shinken is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Shinken. If not, see <http://www.gnu.org/licenses/>.
"""The AutoSlots Class is a MetaClass: it manages how other classes
are created (Classes, not instances of theses classes).
Here it's role is to create the __slots__ list of the class with
all properties of Class.properties and Class.running_properties
so we do not have to add manually all properties to the __slots__
list when we add a new entry"""
[docs]class AutoSlots(type):
"""AutoSlots inherit from type, it's compulsory for metaclass statement
"""
def __new__(mcs, name, bases, dct):
"""Called when we create a new Class
Some properties names are not allowed in __slots__ like 2d_coords of
Host, so we must tag them in properties with no_slots
:param mcs: AutoSlots
:type mcs: object
:param name: string of the Class (like Service)
:type name: str
:param bases: Classes of which Class inherits (like SchedulingItem)
:type bases: object
:param dct: new Class dict (like all method of Service)
:type dct: object
:return: new object
:rtype: object
"""
# Thanks to Bertrand Mathieu to the set idea
slots = dct.get('__slots__', set())
# Now get properties from properties and running_properties
if 'properties' in dct:
props = dct['properties']
slots.update((p for p in props
if not props[p].no_slots))
if 'running_properties' in dct:
props = dct['running_properties']
slots.update((p for p in props
if not props[p].no_slots))
dct['__slots__'] = tuple(slots)
return type.__new__(mcs, name, bases, dct)