+++ /dev/null
-# -*- coding: utf-8 -*-
-
-# Copyright 2018 Whitestack, LLC
-# *************************************************************
-
-# This file is part of OSM Monitoring module
-# All Rights Reserved to Whitestack, LLC
-
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-
-# http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-# For those usages not covered by the Apache License, Version 2.0 please
-# contact: bdiaz@whitestack.com or glavado@whitestack.com
-##"""Simple singleton class."""
-
-from __future__ import unicode_literals
-
-
-class Singleton(object):
- """Simple singleton class."""
-
- def __init__(self, decorated):
- """Initialize singleton instance."""
- self._decorated = decorated
-
- def instance(self):
- """Return singleton instance."""
- try:
- return self._instance
- except AttributeError:
- self._instance = self._decorated()
- return self._instance