194 lines
6.4 KiB
Python
194 lines
6.4 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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"""VersionedObjects base exception handling.
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Includes decorator for re-raising VersionedObjects-type exceptions.
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SHOULD include dedicated exception logging.
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"""
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import functools
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import inspect
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import logging
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from oslo_config import cfg
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from oslo_utils import excutils
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import webob.exc
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from oslo_versionedobjects._i18n import _
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LOG = logging.getLogger(__name__)
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exc_log_opts = [
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cfg.BoolOpt('fatal_exception_format_errors',
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default=False,
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help='Make exception message format errors fatal'),
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]
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CONF = cfg.CONF
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CONF.register_opts(exc_log_opts, group='oslo_versionedobjects')
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class ConvertedException(webob.exc.WSGIHTTPException):
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def __init__(self, code=0, title="", explanation=""):
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self.code = code
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self.title = title
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self.explanation = explanation
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super(ConvertedException, self).__init__()
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def _cleanse_dict(original):
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"""Strip all admin_password, new_pass, rescue_pass keys from a dict."""
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return {k: v for k, v in original.items() if "_pass" not in k}
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def wrap_exception(notifier=None, get_notifier=None):
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"""Catch all exceptions in wrapped method
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This decorator wraps a method to catch any exceptions that may
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get thrown. It also optionally sends the exception to the notification
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system.
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"""
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def inner(f):
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def wrapped(self, context, *args, **kw):
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# Don't store self or context in the payload, it now seems to
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# contain confidential information.
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try:
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return f(self, context, *args, **kw)
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except Exception as e:
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with excutils.save_and_reraise_exception():
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if notifier or get_notifier:
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payload = dict(exception=e)
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call_dict = inspect.getcallargs(f, self, context,
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*args, **kw)
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cleansed = _cleanse_dict(call_dict)
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payload.update({'args': cleansed})
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# If f has multiple decorators, they must use
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# functools.wraps to ensure the name is
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# propagated.
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event_type = f.__name__
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(notifier or get_notifier()).error(context,
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event_type,
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payload)
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return functools.wraps(f)(wrapped)
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return inner
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class VersionedObjectsException(Exception):
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"""Base VersionedObjects Exception
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To correctly use this class, inherit from it and define
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a 'msg_fmt' property. That msg_fmt will get printf'd
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with the keyword arguments provided to the constructor.
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"""
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msg_fmt = _("An unknown exception occurred.")
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code = 500
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headers = {}
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safe = False
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def __init__(self, message=None, **kwargs):
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self.kwargs = kwargs
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if 'code' not in self.kwargs:
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try:
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self.kwargs['code'] = self.code
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except AttributeError:
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pass
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if not message:
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try:
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message = self.msg_fmt % kwargs
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except Exception:
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# kwargs doesn't match a variable in the message
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# log the issue and the kwargs
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LOG.exception('Exception in string format operation')
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for name, value in kwargs.items():
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LOG.error("%s: %s" % (name, value)) # noqa
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if CONF.oslo_versionedobjects.fatal_exception_format_errors:
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raise
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else:
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# at least get the core message out if something happened
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message = self.msg_fmt
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super(VersionedObjectsException, self).__init__(message)
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def format_message(self):
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# NOTE(mrodden): use the first argument to the python Exception object
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# which should be our full VersionedObjectsException message,
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# (see __init__)
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return self.args[0]
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class ObjectActionError(VersionedObjectsException):
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msg_fmt = _('Object action %(action)s failed because: %(reason)s')
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class ObjectFieldInvalid(VersionedObjectsException):
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msg_fmt = _('Field %(field)s of %(objname)s is not an instance of Field')
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class OrphanedObjectError(VersionedObjectsException):
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msg_fmt = _('Cannot call %(method)s on orphaned %(objtype)s object')
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class IncompatibleObjectVersion(VersionedObjectsException):
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msg_fmt = _('Version %(objver)s of %(objname)s is not supported, '
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'supported version is %(supported)s')
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class ReadOnlyFieldError(VersionedObjectsException):
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msg_fmt = _('Cannot modify readonly field %(field)s')
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class UnsupportedObjectError(VersionedObjectsException):
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msg_fmt = _('Unsupported object type %(objtype)s')
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class EnumRequiresValidValuesError(VersionedObjectsException):
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msg_fmt = _('Enum fields require a list of valid_values')
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class EnumValidValuesInvalidError(VersionedObjectsException):
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msg_fmt = _('Enum valid values are not valid')
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class EnumFieldInvalid(VersionedObjectsException):
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msg_fmt = _('%(typename)s in %(fieldname)s is not an instance of Enum')
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class EnumFieldUnset(VersionedObjectsException):
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msg_fmt = _('%(fieldname)s missing field type')
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class InvalidTargetVersion(VersionedObjectsException):
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msg_fmt = _('Invalid target version %(version)s')
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class TargetBeforeSubobjectExistedException(VersionedObjectsException):
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msg_fmt = _("No subobject existed at version %(target_version)s")
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class UnregisteredSubobject(VersionedObjectsException):
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msg_fmt = _("%(child_objname)s is referenced by %(parent_objname)s but "
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"is not registered")
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