group-based-policy/gbpservice/common/utils.py

141 lines
4.0 KiB
Python

# 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.
from collections import OrderedDict
import sys
from neutron_lib import context as n_context
from oslo_config import cfg
from oslo_log import log as logging
from oslo_serialization import jsonutils
from oslo_utils import importutils
from stevedore import driver
from gbpservice._i18n import _
LOG = logging.getLogger(__name__)
cfg.CONF.import_group('keystone_authtoken', 'keystonemiddleware.auth_token')
def get_function_local_from_stack(function, local):
frame = sys._getframe()
while frame:
if frame.f_code.co_name == function:
return frame.f_locals.get(local)
frame = frame.f_back
def get_obj_from_stack(cls):
i = 1
try:
while True:
for val in list(sys._getframe(i).f_locals.values()):
if isinstance(val, cls):
return val
i = i + 1
except Exception:
return
def get_current_context():
return get_obj_from_stack(n_context.Context)
def get_resource_plural(resource):
if resource.endswith('y'):
resource_plural = resource.replace('y', 'ies')
else:
resource_plural = resource + 's'
return resource_plural
def load_plugin(namespace, plugin):
try:
# Try to resolve plugin by name
mgr = driver.DriverManager(namespace, plugin)
plugin_class = mgr.driver
except RuntimeError as e1:
# fallback to class name
try:
plugin_class = importutils.import_class(plugin)
except ImportError as e2:
LOG.exception("Error loading plugin by name, %s", e1)
LOG.exception("Error loading plugin by class, %s", e2)
raise ImportError(_("Plugin not found."))
return plugin_class()
def admin_context(context):
admin_context = n_context.get_admin_context()
admin_context._session = context.session
return admin_context
# created a common function for tackling issues of sorting a list of dict
# or list of string for Py3 support
def deep_sort(obj):
if isinstance(obj, dict):
obj = OrderedDict(sorted(obj.items()))
for k, v in list(obj.items()):
if isinstance(v, dict) or isinstance(v, list):
obj[k] = deep_sort(v)
if isinstance(obj, list):
for i, v in enumerate(obj):
if isinstance(v, dict) or isinstance(v, list):
obj[i] = deep_sort(v)
obj = sorted(
obj,
key=lambda x: jsonutils.dumps(x, default=lambda o: o.__dict__))
return obj
# comparing 2 (nested) dict or list of (nested) dict
def is_equal(obj1, obj2):
sorted_obj1 = deep_sort(obj1)
sorted_obj2 = deep_sort(obj2)
return sorted_obj1 == sorted_obj2
class DictClass(dict):
def __getattr__(self, item):
return self[item]
__setattr__ = dict.__setattr__
__delattr__ = dict.__delattr__
def get_keystone_creds():
keystone_conf = cfg.CONF.keystone_authtoken
user = keystone_conf.username
pw = keystone_conf.password
tenant = keystone_conf.project_name
if keystone_conf.get('auth_uri'):
auth_url = keystone_conf.auth_uri.rstrip('/')
if not auth_url.endswith('/v2.0'):
auth_url += '/v2.0'
else:
auth_url = ('%s://%s:%s/v2.0' % (
keystone_conf.auth_protocol,
keystone_conf.auth_host,
keystone_conf.auth_port))
return user, pw, tenant, auth_url + '/'
def set_difference(iterable_1, iterable_2):
set1 = set(iterable_1)
set2 = set(iterable_2)
return (set1 - set2), (set2 - set1)