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# Copyright (c) 2017 OpenStack Foundation
#
# 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.
class OvsdbAppException(RuntimeError):
"""Base OvsdbApp Exception.
To correctly use this class, inherit from it and define
a 'message' property. That message will get printf'd
with the keyword arguments provided to the constructor.
"""
message = "An unknown exception occurred."
def __init__(self, **kwargs):
try:
super().__init__(self.message % kwargs)
self.msg = self.message % kwargs
except Exception:
if self.use_fatal_exceptions():
raise
# at least get the core message out if something happened
super().__init__(self.message)
def __str__(self):
return self.msg
def use_fatal_exceptions(self):
"""Is the instance using fatal exceptions.
:returns: Always returns False.
"""
return False
class TimeoutException(OvsdbAppException):
message = ("Commands %(commands)s exceeded timeout %(timeout)d seconds, "
"cause: %(cause)s")
class OvsdbConnectionUnavailable(OvsdbAppException):
message = ("OVS database connection to %(db_schema)s failed with error: "
"'%(error)s'. Verify that OVS and related services are "
"available and that the relevant configuration options "
"are correct.")
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