93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
#
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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 abc
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import six
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from oslo_config import cfg
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@six.add_metaclass(abc.ABCMeta)
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class ClientPlugin(object):
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# Module which contains all exceptions classes which the client
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# may emit
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exceptions_module = None
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def __init__(self, context):
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self.context = context
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self.clients = context.clients
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self._client = None
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def client(self):
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if not self._client:
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self._client = self._create()
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return self._client
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@abc.abstractmethod
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def _create(self):
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'''Return a newly created client.'''
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pass
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@property
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def auth_token(self):
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# Always use the auth_token from the keystone client, as
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# this may be refreshed if the context contains credentials
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# which allow reissuing of a new token before the context
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# auth_token expiry (e.g trust_id or username/password)
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return self.clients.client('keystone').auth_token
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def url_for(self, **kwargs):
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kc = self.clients.client('keystone')
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return kc.service_catalog.url_for(**kwargs)
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def _get_client_option(self, client, option):
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# look for the option in the [clients_${client}] section
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# unknown options raise cfg.NoSuchOptError
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try:
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group_name = 'clients_' + client
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cfg.CONF.import_opt(option, 'bilean.common.config',
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group=group_name)
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v = getattr(getattr(cfg.CONF, group_name), option)
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if v is not None:
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return v
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except cfg.NoSuchGroupError:
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pass # do not error if the client is unknown
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# look for the option in the generic [clients] section
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cfg.CONF.import_opt(option, 'bilean.common.config', group='clients')
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return getattr(cfg.CONF.clients, option)
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def is_client_exception(self, ex):
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'''Returns True if the current exception comes from the client.'''
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if self.exceptions_module:
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if isinstance(self.exceptions_module, list):
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for m in self.exceptions_module:
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if type(ex) in m.__dict__.values():
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return True
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else:
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return type(ex) in self.exceptions_module.__dict__.values()
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return False
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def is_not_found(self, ex):
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'''Returns True if the exception is a not-found.'''
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return False
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def is_over_limit(self, ex):
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'''Returns True if the exception is an over-limit.'''
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return False
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def ignore_not_found(self, ex):
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'''Raises the exception unless it is a not-found.'''
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if not self.is_not_found(ex):
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raise ex
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