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# Copyright 2013 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.
from oslo_log import log
from keystone.common import dependency
from keystone.common import manager
from keystone import exception
from keystone.i18n import _LI
from keystone import notifications
LOG = log.getLogger(__name__)
@dependency.provider('example_api')
class ExampleManager(manager.Manager):
"""Example Manager.
See :mod:`keystone.common.manager.Manager` for more details on
how this dynamically calls the backend.
"""
def __init__(self):
# The following is an example of event callbacks. In this setup,
# ExampleManager's data model is depended on project's data model.
# It must create additional aggregates when a new project is created,
# and it must cleanup data related to the project whenever a project
# has been deleted.
#
# In this example, the project_deleted_callback will be invoked
# whenever a project has been deleted. Similarly, the
# project_created_callback will be invoked whenever a new project is
# created.
# This information is used when the @dependency.provider decorator acts
# on the class.
self.event_callbacks = {
notifications.ACTIONS.deleted: {
'project': [self.project_deleted_callback],
},
notifications.ACTIONS.created: {
'project': [self.project_created_callback],
},
}
super(ExampleManager, self).__init__(
'keystone.contrib.example.core.ExampleDriver')
def project_deleted_callback(self, service, resource_type, operation,
payload):
# The code below is merely an example.
msg = _LI('Received the following notification: service %(service)s, '
'resource_type: %(resource_type)s, operation %(operation)s '
'payload %(payload)s')
LOG.info(msg, {'service': service, 'resource_type': resource_type,
'operation': operation, 'payload': payload})
def project_created_callback(self, service, resource_type, operation,
payload):
# The code below is merely an example.
msg = _LI('Received the following notification: service %(service)s, '
'resource_type: %(resource_type)s, operation %(operation)s '
'payload %(payload)s')
LOG.info(msg, {'service': service, 'resource_type': resource_type,
'operation': operation, 'payload': payload})
class ExampleDriver(object):
"""Interface description for Example driver."""
def do_something(self, data):
"""Do something
:param data: example data
:type data: string
:raises: keystone.exception,
:returns: None.
"""
raise exception.NotImplemented()
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