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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# 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.
"""Nova base exception handling.
Includes decorator for re-raising Nova-type exceptions.
SHOULD include dedicated exception logging.
"""
from nova import log as logging
LOG = logging.getLogger('nova.exception')
class ProcessExecutionError(IOError):
def __init__(self, stdout=None, stderr=None, exit_code=None, cmd=None,
description=None):
if description is None:
description = _('Unexpected error while running command.')
if exit_code is None:
exit_code = '-'
message = _('%(description)s\nCommand: %(cmd)s\n'
'Exit code: %(exit_code)s\nStdout: %(stdout)r\n'
'Stderr: %(stderr)r') % locals()
IOError.__init__(self, message)
class Error(Exception):
def __init__(self, message=None):
super(Error, self).__init__(message)
class ApiError(Error):
def __init__(self, message='Unknown', code='ApiError'):
self.message = message
self.code = code
super(ApiError, self).__init__('%s: %s' % (code, message))
class NotFound(Error):
pass
class InstanceNotFound(NotFound):
def __init__(self, message, instance_id):
self.instance_id = instance_id
super(InstanceNotFound, self).__init__(message)
class VolumeNotFound(NotFound):
def __init__(self, message, volume_id):
self.volume_id = volume_id
super(VolumeNotFound, self).__init__(message)
class Duplicate(Error):
pass
class NotAuthorized(Error):
pass
class NotEmpty(Error):
pass
class Invalid(Error):
pass
class InvalidInputException(Error):
pass
class InvalidContentType(Error):
pass
class TimeoutException(Error):
pass
class DBError(Error):
"""Wraps an implementation specific exception."""
def __init__(self, inner_exception):
self.inner_exception = inner_exception
super(DBError, self).__init__(str(inner_exception))
def wrap_db_error(f):
def _wrap(*args, **kwargs):
try:
return f(*args, **kwargs)
except Exception, e:
LOG.exception(_('DB exception wrapped.'))
raise DBError(e)
return _wrap
_wrap.func_name = f.func_name
def wrap_exception(f):
def _wrap(*args, **kw):
try:
return f(*args, **kw)
except Exception, e:
if not isinstance(e, Error):
#exc_type, exc_value, exc_traceback = sys.exc_info()
LOG.exception(_('Uncaught exception'))
#logging.error(traceback.extract_stack(exc_traceback))
raise Error(str(e))
raise
_wrap.func_name = f.func_name
return _wrap
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