Add plugin support to the notification portion of the collector daemon.

Implement a Counter class for use by notification plugins.
Define a base class for Notification plugins.
Define a dispatcher class for notification events to be passed to the plugins.
Add a notification plugin for instance creation and "instance" counters.
Add a reusable function for turning a Counter into a metering event dictionary.

Change-Id: Iaa626b98e1a661ed31cc8b8e95263c111df20888

.gitignore

@@ -2,3 +2,5 @@
 *.dat
 TAGS
 *.egg-info
+build
+.coverage

bin/ceilometer-nova-instance

@@ -28,12 +28,12 @@ from nova import service
 from nova import utils
 
 if __name__ == '__main__':
-    utils.default_flagfile()
+    utils.default_cfgfile()
     flags.FLAGS(sys.argv)
     logging.setup()
     utils.monkey_patch()
     server = service.Service.create(binary='ceilometer-nova-instance',
                                     topic='ceilometer',
-                                    manager='ceilometer.nova.manager.InstanceManager')
+                                    manager='ceilometer.collector.manager.CollectorManager')
     service.serve(server)
     service.wait()

ceilometer/collector/dispatcher.py

@@ -0,0 +1,78 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
+#
+# 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.
+"""Given an incoming message, process it through the registered converters
+and publish the results.
+"""
+
+import pkg_resources
+
+from nova import log as logging
+
+# FIXME(dhellmann): We need to have the main program set up logging
+# correctly so messages from modules outside of the nova package
+# appear in the output.
+LOG = logging.getLogger('nova.' + __name__)
+
+
+class NotificationDispatcher(object):
+    """Manages invoking plugins to convert notification messages to counters.
+    """
+
+    def __init__(self, plugin_namespace, publish_func):
+        self.plugin_namespace = plugin_namespace
+        self.publish_func = publish_func
+        self.handlers = {}
+        self._load_plugins()
+
+    def _load_plugins(self):
+        # Listen for notifications from nova
+        for ep in pkg_resources.iter_entry_points(self.plugin_namespace):
+            LOG.info('attempting to load notification handler for %s:%s',
+                     self.plugin_namespace, ep.name)
+            try:
+                plugin_class = ep.load()
+                plugin = plugin_class()
+                # FIXME(dhellmann): Currently assumes all plugins are
+                # enabled when they are discovered and
+                # importable. Need to add check against global
+                # configuration flag and check that asks the plugin if
+                # it should be enabled.
+                for event_type in plugin.get_event_types():
+                    LOG.info('subscribing %s handler to %s events',
+                             ep.name, event_type)
+                    self.handlers.setdefault(event_type, []).append(plugin)
+            except Exception as err:
+                LOG.warning('Failed to load notification handler %s: %s',
+                            ep.name, err)
+                LOG.exception(err)
+        if not self.handlers:
+            LOG.warning('Failed to load any notification handlers for %s',
+                        self.plugin_namespace)
+
+    def notify(self, body):
+        """Dispatch the notification to the appropriate handler
+        and publish the counters returned.
+        """
+        event_type = body.get('event_type')
+        LOG.info('NOTIFICATION: %s', event_type)
+        for handler in self.handlers.get(event_type, []):
+            for c in handler.process_notification(body):
+                LOG.info('COUNTER: %s', c)
+                # FIXME(dhellmann): Spawn green thread?
+                self.publish_func(body, c)
+        return

ceilometer/collector/manager.py

@@ -0,0 +1,58 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 eNovance <licensing@enovance.com>
+#
+# Author: Julien Danjou <julien@danjou.info>
+#
+# 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 flags
+from nova import log as logging
+from nova import manager
+
+from ceilometer import rpc
+from ceilometer import meter
+from ceilometer.collector import dispatcher
+
+# FIXME(dhellmann): There must be another way to do this.
+# Import rabbit_notifier to register notification_topics flag
+import nova.notifier.rabbit_notifier
+
+FLAGS = flags.FLAGS
+# FIXME(dhellmann): We need to have the main program set up logging
+# correctly so messages from modules outside of the nova package
+# appear in the output.
+LOG = logging.getLogger('nova.' + __name__)
+
+
+COMPUTE_COLLECTOR_NAMESPACE = 'ceilometer.collector.compute'
+
+
+class CollectorManager(manager.Manager):
+    def init_host(self):
+        self.connection = rpc.Connection(flags.FLAGS)
+        self.compute_handler = dispatcher.NotificationDispatcher(
+            COMPUTE_COLLECTOR_NAMESPACE,
+            self._publish_counter,
+            )
+        self.connection.declare_topic_consumer(
+            topic='%s.info' % flags.FLAGS.notification_topics[0],
+            callback=self.compute_handler.notify)
+        self.connection.consume_in_thread()
+
+    def _publish_counter(self, notice, c):
+        """Create a metering message for the counter and publish it."""
+        msg = meter.meter_message_from_counter(notice, c)
+        LOG.info('PUBLISH: %s', str(msg))
+        # FIXME(dhellmann): Need to publish the message on the
+        # metering queue.

ceilometer/compute/notifications.py

@@ -18,26 +18,38 @@
 """Converters for producing compute counter messages from notification events.
 """
 
-from .. import signature
+from .. import counter
+from .. import plugin
 
 
 def c1(body):
     """Generate c1(instance) counters for a notice."""
-    c = {'source': '?',
-         'counter_type': 'instance',
-         'counter_volume': 1,
-         'user_id': body['payload']['user_id'],
-         'project_id': body['payload']['tenant_id'],
-         'resource_id': body['payload']['instance_id'],
-         'counter_datetime': body['timestamp'],
-         'counter_duration': 0,
-         # FIXME(dhellmann): Add region and other details to metadata
-         'resource_metadata': {'display_name':
+    return counter.Counter(
+        source='?',
+        type='instance',
+        volume=1,
+        resource_id=body['payload']['instance_id'],
+        datetime=body['timestamp'],
+        duration=0,
+        # FIXME(dhellmann): Add region and other
+        # details to metadata
+        resource_metadata={
+            'display_name':
                 body['payload']['display_name'],
             'instance_type':
                 body['payload']['instance_type_id'],
             'host': body['publisher_id'],
             },
-         }
-    c['message_signature'] = signature.compute_signature(c)
-    return [c]
+        )
+
+
+class InstanceCreate(plugin.NotificationBase):
+    """Convert compute.instance.create.end notifications into Counters
+    """
+
+    def get_event_types(self):
+        return ['compute.instance.create.end']
+
+    def process_notification(self, message):
+        return [c1(message),
+                ]

ceilometer/counter.py

@@ -0,0 +1,36 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
+#
+# 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.
+"""Counter class for holding data about a metering event.
+
+A Counter doesn't really do anything, but we need a way to
+ensure that all of the appropriate fields have been filled
+in by the plugins that create them.
+"""
+
+import collections
+
+
+Counter = collections.namedtuple('Counter',
+                                 ' '.join(['source',
+                                           'type',
+                                           'volume',
+                                           'resource_id',
+                                           'datetime',
+                                           'duration',
+                                           'resource_metadata'])
+                                 )

ceilometer/meter.py

@@ -20,6 +20,7 @@
 
 import hmac
 import hashlib
+import uuid
 
 
 # FIXME(dhellmann): Need to move this secret out of the code. Where?
@@ -38,3 +39,24 @@ def compute_signature(message):
         digest_maker.update(name)
         digest_maker.update(unicode(value).encode('utf-8'))
     return digest_maker.hexdigest()
+
+
+def meter_message_from_counter(notice, counter):
+    """Make a metering message ready to be published or stored.
+
+    Returns a dictionary containing a metering message
+    for a notification message and a Counter instance.
+    """
+    msg = {'source': counter.source,
+           'counter_type': counter.type,
+           'counter_volume': counter.volume,
+           'user_id': notice['payload']['user_id'],
+           'project_id': notice['payload']['tenant_id'],
+           'resource_id': counter.resource_id,
+           'counter_datetime': counter.datetime,
+           'counter_duration': counter.duration,
+           'resource_metadata': counter.resource_metadata,
+           'message_id': str(uuid.uuid1()),
+           }
+    msg['message_signature'] = compute_signature(msg)
+    return msg

ceilometer/nova/manager.py

@@ -23,11 +23,6 @@ from nova import manager
 from nova import flags
 import nova.virt.connection
 
-# Import rabbit_notifier to register notification_topics flag
-import nova.notifier.rabbit_notifier
-
-from ceilometer import rpc
-
 FLAGS = flags.FLAGS
 # FIXME(dhellmann): We need to have the main program set up logging
 # correctly so messages from modules outside of the nova package
@@ -35,19 +30,6 @@ FLAGS = flags.FLAGS
 LOG = logging.getLogger('nova.' + __name__)
 
 
-class InstanceManager(manager.Manager):
-    def init_host(self):
-        self.connection = rpc.Connection(flags.FLAGS)
-        self.connection.declare_topic_consumer(
-            topic='%s.info' % flags.FLAGS.notification_topics[0],
-            callback=self._on_notification)
-        self.connection.consume_in_thread()
-
-    def _on_notification(self, body):
-        event_type = body.get('event_type')
-        LOG.info('NOTIFICATION: %s', event_type)
-
-
 class ComputeManager(manager.Manager):
     def _get_disks(self, conn, instance):
         """Get disks of an instance, only used to bypass bug#998089."""

ceilometer/plugin.py

@@ -15,26 +15,24 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-"""Tests for converters for producing compute counter messages from
-notification events.
+"""Base class for plugins.
 """
 
-from ceilometer import signature
+import abc
 
 
-def test_change_key():
-    sig1 = signature.compute_signature({'a': 'A', 'b': 'B'})
-    sig2 = signature.compute_signature({'A': 'A', 'b': 'B'})
-    assert sig1 != sig2
+class NotificationBase(object):
+    """Base class for plugins that support the notification API."""
 
+    __metaclass__ = abc.ABCMeta
 
-def test_change_value():
-    sig1 = signature.compute_signature({'a': 'A', 'b': 'B'})
-    sig2 = signature.compute_signature({'a': 'a', 'b': 'B'})
-    assert sig1 != sig2
+    @abc.abstractmethod
+    def get_event_types(self):
+        """Return a sequence of strings defining the event types to be
+        given to this plugin."""
+        return []
 
-
-def test_same():
-    sig1 = signature.compute_signature({'a': 'A', 'b': 'B'})
-    sig2 = signature.compute_signature({'a': 'A', 'b': 'B'})
-    assert sig1 == sig2
+    @abc.abstractmethod
+    def process_notification(self, message):
+        """Return a sequence of Counter instances for the given message."""
+        pass

run_tests.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+# Simple test runner, should be replaced with tox
+
+nosetests -P -d -v --with-coverage --cover-package=ceilometer --cover-inclusive tests

setup.py

@@ -19,7 +19,8 @@
 
 import setuptools
 
-setuptools.setup(name='ceilometer',
+setuptools.setup(
+    name='ceilometer',
     version='0',
     description='cloud computing metering',
     author='OpenStack',
@@ -29,4 +30,10 @@ setuptools.setup(name='ceilometer',
     include_package_data=True,
     test_suite='nose.collector',
     scripts=['bin/ceilometer-nova-compute'],
-                 py_modules=[])
+    py_modules=[],
+    entry_points={
+        'ceilometer.collector.compute': [
+            'instance_create = ceilometer.compute.notifications:InstanceCreate',
+            ],
+        },
+    )

tests/collector/test_dispatcher.py

@@ -0,0 +1,104 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
+#
+# 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.
+"""Tests for ceilometer/nova/dispatcher.py
+"""
+
+from ceilometer.compute import notifications
+from ceilometer.collector import dispatcher
+
+
+class StubDispatcher(dispatcher.NotificationDispatcher):
+    def _load_plugins(self):
+        self.handlers['compute.instance.create.end'] = [notifications.InstanceCreate()]
+
+
+TEST_NOTICE = {
+    u'_context_auth_token': u'3d8b13de1b7d499587dfc69b77dc09c2',
+    u'_context_is_admin': True,
+    u'_context_project_id': u'7c150a59fe714e6f9263774af9688f0e',
+    u'_context_quota_class': None,
+    u'_context_read_deleted': u'no',
+    u'_context_remote_address': u'10.0.2.15',
+    u'_context_request_id': u'req-d68b36e0-9233-467f-9afb-d81435d64d66',
+    u'_context_roles': [u'admin'],
+    u'_context_timestamp': u'2012-05-08T20:23:41.425105',
+    u'_context_user_id': u'1e3ce043029547f1a61c1996d1a531a2',
+    u'event_type': u'compute.instance.create.end',
+    u'message_id': u'dae6f69c-00e0-41c0-b371-41ec3b7f4451',
+    u'payload': {u'created_at': u'2012-05-08 20:23:41',
+                 u'deleted_at': u'',
+                 u'disk_gb': 0,
+                 u'display_name': u'testme',
+                 u'fixed_ips': [{u'address': u'10.0.0.2',
+                                 u'floating_ips': [],
+                                 u'meta': {},
+                                 u'type': u'fixed',
+                                 u'version': 4}],
+                 u'image_ref_url': u'http://10.0.2.15:9292/images/UUID',
+                 u'instance_id': u'9f9d01b9-4a58-4271-9e27-398b21ab20d1',
+                 u'instance_type': u'm1.tiny',
+                 u'instance_type_id': 2,
+                 u'launched_at': u'2012-05-08 20:23:47.985999',
+                 u'memory_mb': 512,
+                 u'state': u'active',
+                 u'state_description': u'',
+                 u'tenant_id': u'7c150a59fe714e6f9263774af9688f0e',
+                 u'user_id': u'1e3ce043029547f1a61c1996d1a531a2'},
+    u'priority': u'INFO',
+    u'publisher_id': u'compute.vagrant-precise',
+    u'timestamp': u'2012-05-08 20:23:48.028195',
+    }
+
+
+def test_notify():
+    results = []
+    d = StubDispatcher(None, lambda x, y: results.append((x, y)))
+    d.notify(TEST_NOTICE)
+    assert len(results) == 1
+    counter = results[0][1]
+    assert counter.type == 'instance'
+
+
+def test_load_compute_plugins():
+    results = []
+    d = dispatcher.NotificationDispatcher(
+        'ceilometer.collector.compute',
+        lambda x, y: results.append((x, y))
+        )
+    assert d.handlers, 'No handlers were loaded'
+
+
+def test_load_no_plugins():
+    results = []
+    d = dispatcher.NotificationDispatcher(
+        'ceilometer.collector.none',
+        lambda x, y: results.append((x, y))
+        )
+    assert not d.handlers, 'Handlers were loaded'
+
+
+def test_notify_through_plugin():
+    results = []
+    d = dispatcher.NotificationDispatcher(
+        'ceilometer.collector.compute',
+        lambda x, y: results.append((x, y))
+        )
+    d.notify(TEST_NOTICE)
+    assert len(results) == 1
+    counter = results[0][1]
+    assert counter.type == 'instance'

tests/compute/test_notifications.py

@@ -65,29 +65,27 @@ def compare(name, actual, expected):
 
 
 def test_c1():
-    info = notifications.c1(INSTANCE_CREATE_END)[0]
+    info = notifications.c1(INSTANCE_CREATE_END)
 
     for name, actual, expected in [
-        ('counter_type', info['counter_type'], 'instance'),
-        ('counter_volume', info['counter_volume'], 1),
-        ('counter_datetime', info['counter_datetime'],
+        ('counter_type', info.type, 'instance'),
+        ('counter_volume', info.volume, 1),
+        ('counter_datetime', info.datetime,
          INSTANCE_CREATE_END['timestamp']),
-        ('user_id', info['user_id'],
-         INSTANCE_CREATE_END['payload']['user_id']),
-        ('project_id', info['project_id'],
-         INSTANCE_CREATE_END['payload']['tenant_id']),
-        ('resource_id', info['resource_id'],
+        ('resource_id', info.resource_id,
          INSTANCE_CREATE_END['payload']['instance_id']),
-        ('display_name', info['resource_metadata']['display_name'],
+        ('display_name', info.resource_metadata['display_name'],
          INSTANCE_CREATE_END['payload']['display_name']),
-        ('instance_type', info['resource_metadata']['instance_type'],
+        ('instance_type', info.resource_metadata['instance_type'],
          INSTANCE_CREATE_END['payload']['instance_type_id']),
-        ('host', info['resource_metadata']['host'],
+        ('host', info.resource_metadata['host'],
          INSTANCE_CREATE_END['publisher_id']),
         ]:
         yield compare, name, actual, expected
 
 
-def test_c1_signed():
-    info = notifications.c1(INSTANCE_CREATE_END)[0]
-    assert 'message_signature' in info
+def test_instance_create():
+    ic = notifications.InstanceCreate()
+    counters = ic.process_notification(INSTANCE_CREATE_END)
+    assert len(counters) == 1
+    assert counters[0].type == 'instance'

tests/test_meter.py

@@ -0,0 +1,124 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2012 New Dream Network, LLC (DreamHost)
+#
+# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
+#
+# 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.
+"""Tests for ceilometer.meter
+"""
+
+from ceilometer import counter
+from ceilometer import meter
+
+
+def test_compute_signature_change_key():
+    sig1 = meter.compute_signature({'a': 'A', 'b': 'B'})
+    sig2 = meter.compute_signature({'A': 'A', 'b': 'B'})
+    assert sig1 != sig2
+
+
+def test_compute_signature_change_value():
+    sig1 = meter.compute_signature({'a': 'A', 'b': 'B'})
+    sig2 = meter.compute_signature({'a': 'a', 'b': 'B'})
+    assert sig1 != sig2
+
+
+def test_compute_signature_same():
+    sig1 = meter.compute_signature({'a': 'A', 'b': 'B'})
+    sig2 = meter.compute_signature({'a': 'A', 'b': 'B'})
+    assert sig1 == sig2
+
+
+def test_compute_signature_signed():
+    data = {'a': 'A', 'b': 'B'}
+    sig1 = meter.compute_signature(data)
+    data['message_signature'] = sig1
+    sig2 = meter.compute_signature(data)
+    assert sig1 == sig2
+
+
+TEST_COUNTER = counter.Counter(source='src',
+                               type='typ',
+                               volume=1,
+                               resource_id=2,
+                               datetime='today',
+                               duration=3,
+                               resource_metadata={'key': 'value'},
+                               )
+
+TEST_NOTICE = {
+    u'_context_auth_token': u'3d8b13de1b7d499587dfc69b77dc09c2',
+    u'_context_is_admin': True,
+    u'_context_project_id': u'7c150a59fe714e6f9263774af9688f0e',
+    u'_context_quota_class': None,
+    u'_context_read_deleted': u'no',
+    u'_context_remote_address': u'10.0.2.15',
+    u'_context_request_id': u'req-d68b36e0-9233-467f-9afb-d81435d64d66',
+    u'_context_roles': [u'admin'],
+    u'_context_timestamp': u'2012-05-08T20:23:41.425105',
+    u'_context_user_id': u'1e3ce043029547f1a61c1996d1a531a2',
+    u'event_type': u'compute.instance.create.end',
+    u'message_id': u'dae6f69c-00e0-41c0-b371-41ec3b7f4451',
+    u'payload': {u'created_at': u'2012-05-08 20:23:41',
+                 u'deleted_at': u'',
+                 u'disk_gb': 0,
+                 u'display_name': u'testme',
+                 u'fixed_ips': [{u'address': u'10.0.0.2',
+                                 u'floating_ips': [],
+                                 u'meta': {},
+                                 u'type': u'fixed',
+                                 u'version': 4}],
+                 u'image_ref_url': u'http://10.0.2.15:9292/images/UUID',
+                 u'instance_id': u'9f9d01b9-4a58-4271-9e27-398b21ab20d1',
+                 u'instance_type': u'm1.tiny',
+                 u'instance_type_id': 2,
+                 u'launched_at': u'2012-05-08 20:23:47.985999',
+                 u'memory_mb': 512,
+                 u'state': u'active',
+                 u'state_description': u'',
+                 u'tenant_id': u'7c150a59fe714e6f9263774af9688f0e',
+                 u'user_id': u'1e3ce043029547f1a61c1996d1a531a2'},
+    u'priority': u'INFO',
+    u'publisher_id': u'compute.vagrant-precise',
+    u'timestamp': u'2012-05-08 20:23:48.028195',
+    }
+
+
+def test_meter_message_from_counter_user_id():
+    msg = meter.meter_message_from_counter(TEST_NOTICE, TEST_COUNTER)
+    assert msg['user_id'] == TEST_NOTICE['payload']['user_id']
+
+
+def test_meter_message_from_counter_project_id():
+    msg = meter.meter_message_from_counter(TEST_NOTICE, TEST_COUNTER)
+    assert msg['project_id'] == TEST_NOTICE['payload']['tenant_id']
+
+
+def test_meter_message_from_counter_signed():
+    msg = meter.meter_message_from_counter(TEST_NOTICE, TEST_COUNTER)
+    assert 'message_signature' in msg
+
+
+def test_meter_message_from_counter_field():
+    def compare(f, c, msg_f, msg):
+        assert msg == c
+    msg = meter.meter_message_from_counter(TEST_NOTICE, TEST_COUNTER)
+    name_map = {'type': 'counter_type',
+                'volume': 'counter_volume',
+                'datetime': 'counter_datetime',
+                'duration': 'counter_duration',
+                }
+    for f in TEST_COUNTER._fields:
+        msg_f = name_map.get(f, f)
+        yield compare, f, getattr(TEST_COUNTER, f), msg_f, msg[msg_f]

tests/test_tools_notificationclient.py

@@ -31,7 +31,8 @@ def test_send_messages():
 
 def test_record_messages():
     conn = mox.MockObject(impl_kombu.Connection)
-    conn.declare_topic_consumer('notifications.info', mox.IsA(types.FunctionType))
+    conn.declare_topic_consumer('notifications.info',
+                                mox.IsA(types.FunctionType))
     conn.consume()
     mox.Replay(conn)
     notificationclient.record_messages(conn, StringIO())