/usr/lib/python2.7/dist-packages/shinken/autoslots.py is in shinken-common 1.4-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | #!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2009-2012:
# Gabes Jean, naparuba@gmail.com
# Gerhard Lausser, Gerhard.Lausser@consol.de
# Gregory Starck, g.starck@gmail.com
# Hartmut Goebel, h.goebel@goebel-consult.de
#
# 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"""
class AutoSlots(type):
# new is call when we create a new Class
# that have metaclass = AutoSlots
# CLS is AutoSlots
# name is string of the Class (like Service)
# bases are the Classes of which Class inherits (like SchedulingItem)
# dct is the new Class dict (like all method of Service)
# Some properties names are not allowed in __slots__ like 2d_coords of
# Host, so we must tag them in properties with no_slots
def __new__(cls, name, bases, dct):
# 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__(cls, name, bases, dct)
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