Basic notifications drivers and tests

nova/flags.py

@@ -354,3 +354,6 @@ DEFINE_string('host', socket.gethostname(),
 
 DEFINE_string('node_availability_zone', 'nova',
               'availability zone of this node')
+
+DEFINE_string('notification_driver', 'nova.notifier.no_op_driver.NoopDriver',
+              'Default driver for sending notifications')

nova/notifier/__init__.py

@@ -0,0 +1,19 @@
+# Copyright 2011 OpenStack LLC.
+# 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.
+
+def notify(model):
+    """Sends a notification using the specified driver"""
+    driver = FLAGS.notification_driver
+    driver.notify(model)

nova/notifier/no_op_notifier.py

@@ -0,0 +1,19 @@
+# Copyright 2011 OpenStack LLC.
+# 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.
+
+class NoopNotifier(object):
+    def notify(self, model):
+        """Notifies the recipient of the desired event given the model"""
+        pass

nova/notifier/rabbit_notifier.py

@@ -0,0 +1,24 @@
+# Copyright 2011 OpenStack LLC.
+# 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.
+
+class RabbitNotifier(object):
+    """Sends notifications to a specific RabbitMQ server and topic"""
+
+    def __init__(self):
+        pass
+
+    def notify(self, model):
+        """Sends a notification to the RabbitMQ"""
+        pass

nova/tests/test_notifier.py

@@ -0,0 +1,41 @@
+# Copyright 2011 OpenStack LLC.
+# 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.
+
+from nova import notifier
+from nova import test
+
+import stubout
+
+class NotifierTestCase(test.TestCase):
+    """Test case for notifications"""
+    def setUp(self):
+        super(NotifierTestCase, self).setUp()
+        self.stubs = stubout.StubOutForTesting()
+
+    def tearDown(self):
+        self.stubs.UnsetAll()
+        super(NotifierTestCase, self).tearDown()
+
+    def test_send_notification(self):
+        self.notify_called = False
+        def mock_notify(self, model):
+            self.notify_called = True
+
+        self.stubs.set(nova.notifier.no_op_notifier.NoopNotifier, 'notify',
+                mock_notify)
+
+        model = dict(x=1, y=2)
+        notifier.notify(model)
+        self.assertEqual(True, self.notify_called)