octavia/octavia/api/handlers/abstract_handler.py

68 lines
2.0 KiB
Python

# Copyright 2014 Rackspace
#
# 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
import six
@six.add_metaclass(abc.ABCMeta)
class BaseObjectHandler(object):
"""Base class for any object handler."""
@abc.abstractmethod
def create(self, model_id):
"""Begins process of actually creating data_model."""
pass
@abc.abstractmethod
def update(self, model_id, updated_dict):
"""Begins process of actually updating data_model."""
pass
@abc.abstractmethod
def delete(self, model_id):
"""Begins process of actually deleting data_model."""
pass
class NotImplementedObjectHandler(BaseObjectHandler):
"""Default Object Handler to force implementation of subclasses.
Helper class to make any subclass of AbstractHandler explode if it
is missing any of the required object managers.
"""
@staticmethod
def update(model_id, updated_dict):
raise NotImplementedError()
@staticmethod
def delete(model_id):
raise NotImplementedError()
@staticmethod
def create(model_id):
raise NotImplementedError()
@six.add_metaclass(abc.ABCMeta)
class BaseHandler(object):
"""Base class for all handlers."""
load_balancer = NotImplementedObjectHandler()
listener = NotImplementedObjectHandler()
pool = NotImplementedObjectHandler()
health_monitor = NotImplementedObjectHandler()
member = NotImplementedObjectHandler()
l7policy = NotImplementedObjectHandler()
l7rule = NotImplementedObjectHandler()