5af5d6f30d
Align with the change:
2070d4267c
Close-Bug #1241256
Change-Id: Idc16d75258baa1f5ee05ff48bfadc358c7655e55
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# Copyright 2012 OpenStack Foundation
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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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import os
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import re
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from troveclient.openstack.common import strutils
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class HookableMixin(object):
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"""Mixin so classes can register and run hooks."""
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_hooks_map = {}
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@classmethod
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def add_hook(cls, hook_type, hook_func):
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if hook_type not in cls._hooks_map:
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cls._hooks_map[hook_type] = []
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cls._hooks_map[hook_type].append(hook_func)
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@classmethod
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def run_hooks(cls, hook_type, *args, **kwargs):
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hook_funcs = cls._hooks_map.get(hook_type) or []
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for hook_func in hook_funcs:
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hook_func(*args, **kwargs)
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def env(*vars, **kwargs):
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"""
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returns the first environment variable set
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if none are non-empty, defaults to '' or keyword arg default
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"""
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for v in vars:
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value = os.environ.get(v, None)
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if value:
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return value
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return kwargs.get('default', '')
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# http://code.activestate.com/recipes/
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# 577257-slugify-make-a-string-usable-in-a-url-or-filename/
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def slugify(value):
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"""
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Normalizes string, converts to lowercase, removes non-alpha characters,
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and converts spaces to hyphens.
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From Django's "django/template/defaultfilters.py".
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Make use of strutils.to_slug from openstack common
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"""
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return strutils.to_slug(value, incoming=None, errors="strict")
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