plugins/OpenStack/singleton.py

   1 from __future__ import unicode_literals
   2
   3
   4 class Singleton(object):
   5     """Simple singleton class"""
   6
   7     def __init__(self, decorated):
   8         self._decorated = decorated
   9
  10     def instance(self):
  11         """Return singleton instance"""
  12         try:
  13             return self._instance
  14         except AttributeError:
  15             self._instance = self._decorated()
  16             return self._instance