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diff --git a/keystone-moon/keystone/contrib/example/core.py b/keystone-moon/keystone/contrib/example/core.py
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+++ b/keystone-moon/keystone/contrib/example/core.py
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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()