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# Copyright 2011 OpenStack Foundation.
# 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.
import abc
class HealthcheckResult(object):
"""Result of a ``healthcheck`` method call should be this object."""
def __init__(self, available, reason, details=None):
self.available = available
self.reason = reason
self.details = details
class HealthcheckBaseExtension(metaclass=abc.ABCMeta):
def __init__(self, oslo_conf, conf):
self.oslo_conf = oslo_conf
self.conf = conf
@abc.abstractmethod
def healthcheck(self, server_port):
"""method called by the healthcheck middleware
return: HealthcheckResult object
"""
def _conf_get(self, key, group='healthcheck'):
if key in self.conf:
# Validate value type
self.oslo_conf.set_override(key, self.conf[key], group=group)
return getattr(getattr(self.oslo_conf, group), key)
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