2022-10-10 16:23:47 +05:30
|
|
|
# Copyright 2021 Collate
|
|
|
|
# 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.
|
|
|
|
|
|
|
|
"""
|
|
|
|
Singleton Module
|
|
|
|
"""
|
|
|
|
|
2022-07-19 14:51:44 +02:00
|
|
|
from abc import ABCMeta
|
|
|
|
|
|
|
|
|
|
|
|
class Singleton(ABCMeta):
|
2022-10-10 16:23:47 +05:30
|
|
|
"""
|
|
|
|
Singleton class
|
|
|
|
"""
|
|
|
|
|
2022-07-19 14:51:44 +02:00
|
|
|
_instances = {}
|
|
|
|
|
|
|
|
def __call__(cls, *args, **kwargs):
|
|
|
|
if cls not in cls._instances:
|
|
|
|
cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
|
|
|
|
return cls._instances[cls]
|
|
|
|
|
|
|
|
@classmethod
|
|
|
|
def clear_all(cls):
|
2022-10-10 16:23:47 +05:30
|
|
|
"""
|
|
|
|
Method to clear all singleton instances
|
|
|
|
"""
|
2022-07-19 14:51:44 +02:00
|
|
|
Singleton._instances = {}
|