fec8282ec4
1. SingletonMeta -> modified to allow handling multiple classes and moved to metaclasses too. 2. @logwrap : process asserts too Changes reason: @logwrap was changed during test debug (was assert in wrapped function and stacktrace was not enough for reason understand) and moved out of test changest due to not mandatory for this test. Pros: Now assert, raised in wrapped function is recorded in log with details. SingletonMeta: was changed as "nice to have" during work on plugin helpers. Later plugin helpers was moved out of SshManager, and all code changes was moved to this changeset. Pros: Single way for handling the same tasks in different places. Previously SshManager used Metaclass, which could not be reused for more, than one class and Environment used __new__ directly written in class code. Related-Bug: #1518979 Related-Bug: #1519050 Change-Id: I798302879400747909229cc208f97a669f25bbf3
28 lines
982 B
Python
28 lines
982 B
Python
# Copyright 2016 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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class SingletonMeta(type):
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"""Metaclass for Singleton
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Main goals: not need to implement __new__ in singleton classes
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"""
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_instances = {}
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def __call__(cls, *args, **kwargs):
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if cls not in cls._instances:
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cls._instances[cls] = super(
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SingletonMeta, cls).__call__(*args, **kwargs)
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return cls._instances[cls]
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