openstack/ceilometer
Code Issues Proposed changes

dispatcher: split the database dispatcher

Browse Source 
Change-Id: I6973049554b19d29a524886a217021a2e32efec9
This commit is contained in:
Julien Danjou 2016-07-28 16:20:45 +02:00
parent b92a0315e0
commit 28127f2d01
5 changed files with 48 additions and 42 deletions
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46
ceilometer/dispatcher/database.py
View File

@ -24,8 +24,7 @@ from ceilometer import storage
LOG = log.getLogger(__name__)
class DatabaseDispatcher(dispatcher.MeterDispatcherBase,
dispatcher.EventDispatcherBase):
class DatabaseDispatcher(object):
"""Dispatcher class for recording metering data into database.
The dispatcher class which records each meter into a database configured
@ -38,16 +37,13 @@ class DatabaseDispatcher(dispatcher.MeterDispatcherBase,
meter_dispatchers = database
event_dispatchers = database
"""
def __init__(self, conf):
super(DatabaseDispatcher, self).__init__(conf)
self.conf = conf
self._conn = self._get_db_conn(conf, self.CONNECTION_TYPE, True)
self._meter_conn = self._get_db_conn('metering', True)
self._event_conn = self._get_db_conn('event', True)
def _get_db_conn(self, purpose, ignore_exception=False):
def _get_db_conn(self, conf, purpose, ignore_exception=False):
try:
return storage.get_connection_from_config(self.conf, purpose)
return storage.get_connection_from_config(conf, purpose)
except Exception as err:
params = {"purpose": purpose, "err": err}
LOG.exception(_LE("Failed to connect to db, purpose %(purpose)s "
@ -56,18 +52,19 @@ class DatabaseDispatcher(dispatcher.MeterDispatcherBase,
raise
@property
def meter_conn(self):
if not self._meter_conn:
self._meter_conn = self._get_db_conn('metering')
def conn(self):
if not self._conn:
self._conn = self._get_db_conn(self.conf, self.CONNECTION_TYPE)
return self._conn
return self._meter_conn
@property
def event_conn(self):
if not self._event_conn:
self._event_conn = self._get_db_conn('event')
class MeterDatabaseDispatcher(dispatcher.MeterDispatcherBase,
DatabaseDispatcher):
CONNECTION_TYPE = 'metering'
return self._event_conn
def __init__(self, conf):
DatabaseDispatcher.__init__(self, conf)
dispatcher.MeterDispatcherBase.__init__(self, conf)
def record_metering_data(self, data):
# We may have receive only one counter on the wire
@ -91,12 +88,21 @@ class DatabaseDispatcher(dispatcher.MeterDispatcherBase,
ts = timeutils.parse_isotime(meter['timestamp'])
meter['timestamp'] = timeutils.normalize_time(ts)
try:
self.meter_conn.record_metering_data_batch(data)
self.conn.record_metering_data_batch(data)
except Exception as err:
LOG.error(_LE('Failed to record %(len)s: %(err)s.'),
{'len': len(data), 'err': err})
raise
class EventDatabaseDispatcher(dispatcher.EventDispatcherBase,
DatabaseDispatcher):
CONNECTION_TYPE = 'event'
def __init__(self, conf):
DatabaseDispatcher.__init__(self, conf)
dispatcher.EventDispatcherBase.__init__(self, conf)
def record_events(self, events):
if not isinstance(events, list):
events = [events]
@ -119,4 +125,4 @@ class DatabaseDispatcher(dispatcher.MeterDispatcherBase,
except Exception:
LOG.exception(_LE("Error processing event and it will be "
"dropped: %s"), ev)
self.event_conn.record_events(event_list)
self.conn.record_events(event_list)

19
ceilometer/tests/unit/dispatcher/test_db.py
View File

@ -30,7 +30,8 @@ class TestDispatcherDB(base.BaseTestCase):
super(TestDispatcherDB, self).setUp()
self.CONF = self.useFixture(fixture_config.Config()).conf
self.CONF.set_override('connection', 'sqlite://', group='database')
self.dispatcher = database.DatabaseDispatcher(self.CONF)
self.meter_dispatcher = database.MeterDatabaseDispatcher(self.CONF)
self.event_dispatcher = database.EventDatabaseDispatcher(self.CONF)
self.ctx = None
def test_event_conn(self):
@ -39,9 +40,9 @@ class TestDispatcherDB(base.BaseTestCase):
[], {})
event = utils.message_from_event(event,
self.CONF.publisher.telemetry_secret)
with mock.patch.object(self.dispatcher.event_conn,
with mock.patch.object(self.event_dispatcher._conn,
'record_events') as record_events:
self.dispatcher.record_events(event)
self.event_dispatcher.record_events(event)
self.assertEqual(1, len(record_events.call_args_list[0][0][0]))
def test_valid_message(self):
@ -53,9 +54,9 @@ class TestDispatcherDB(base.BaseTestCase):
msg, self.CONF.publisher.telemetry_secret,
)
with mock.patch.object(self.dispatcher.meter_conn,
with mock.patch.object(self.meter_dispatcher._conn,
'record_metering_data') as record_metering_data:
self.dispatcher.record_metering_data(msg)
self.meter_dispatcher.record_metering_data(msg)
record_metering_data.assert_called_once_with(msg)
@ -72,9 +73,9 @@ class TestDispatcherDB(base.BaseTestCase):
expected = msg.copy()
expected['timestamp'] = datetime.datetime(2012, 7, 2, 13, 53, 40)
with mock.patch.object(self.dispatcher.meter_conn,
with mock.patch.object(self.meter_dispatcher._conn,
'record_metering_data') as record_metering_data:
self.dispatcher.record_metering_data(msg)
self.meter_dispatcher.record_metering_data(msg)
record_metering_data.assert_called_once_with(expected)
@ -92,8 +93,8 @@ class TestDispatcherDB(base.BaseTestCase):
expected['timestamp'] = datetime.datetime(2012, 9, 30, 23,
31, 50, 262000)
with mock.patch.object(self.dispatcher.meter_conn,
with mock.patch.object(self.meter_dispatcher._conn,
'record_metering_data') as record_metering_data:
self.dispatcher.record_metering_data(msg)
self.meter_dispatcher.record_metering_data(msg)
record_metering_data.assert_called_once_with(expected)

17
ceilometer/tests/unit/dispatcher/test_dispatcher.py
View File

@ -19,16 +19,12 @@ from ceilometer import dispatcher
from ceilometer.tests import base
class FakeDispatcherSample(dispatcher.MeterDispatcherBase):
class FakeMeterDispatcher(dispatcher.MeterDispatcherBase):
def record_metering_data(self, data):
pass
class FakeDispatcher(dispatcher.MeterDispatcherBase,
dispatcher.EventDispatcherBase):
def record_metering_data(self, data):
pass
class FakeEventDispatcher(dispatcher.EventDispatcherBase):
def record_events(self, events):
pass
@ -41,10 +37,13 @@ class TestDispatchManager(base.BaseTestCase):
event_dispatchers=['database'])
self.useFixture(mockpatch.Patch(
'ceilometer.dispatcher.gnocchi.GnocchiDispatcher',
new=FakeDispatcherSample))
new=FakeMeterDispatcher))
self.useFixture(mockpatch.Patch(
'ceilometer.dispatcher.database.DatabaseDispatcher',
new=FakeDispatcher))
'ceilometer.dispatcher.database.MeterDatabaseDispatcher',
new=FakeMeterDispatcher))
self.useFixture(mockpatch.Patch(
'ceilometer.dispatcher.database.EventDatabaseDispatcher',
new=FakeEventDispatcher))
def test_load(self):
sample_mg, event_mg = dispatcher.load_dispatcher_manager()

4
ceilometer/tests/unit/test_collector.py
View File

@ -37,7 +37,7 @@ class TestEventDispatcherVerifier(base.BaseTestCase):
'ceilometer.publisher.utils',
'publisher')
self.useFixture(mockpatch.Patch(
'ceilometer.dispatcher.database.DatabaseDispatcher',
'ceilometer.dispatcher.database.EventDatabaseDispatcher',
new=FakeDispatcher))
@mock.patch('ceilometer.publisher.utils.verify_signature')
@ -46,7 +46,7 @@ class TestEventDispatcherVerifier(base.BaseTestCase):
return ev.get('message_signature') != 'bad_signature'
mocked_verify.side_effect = _fake_verify
sample = {"payload": [{"message_signature": "bad_signature"}]}
manager = dispatcher.load_dispatcher_manager()[0]
manager = dispatcher.load_dispatcher_manager()[1]
v = collector.EventEndpoint("secret", manager)
v.sample([sample])
self.assertEqual([], manager['database'].obj.events)

4
setup.cfg
View File

@ -262,13 +262,13 @@ console_scripts =
ceilometer-collector = ceilometer.cmd.collector:main
ceilometer.dispatcher.meter =
database = ceilometer.dispatcher.database:DatabaseDispatcher
database = ceilometer.dispatcher.database:MeterDatabaseDispatcher
file = ceilometer.dispatcher.file:FileDispatcher
http = ceilometer.dispatcher.http:HttpDispatcher
gnocchi = ceilometer.dispatcher.gnocchi:GnocchiDispatcher
ceilometer.dispatcher.event =
database = ceilometer.dispatcher.database:DatabaseDispatcher
database = ceilometer.dispatcher.database:EventDatabaseDispatcher
file = ceilometer.dispatcher.file:FileDispatcher
http = ceilometer.dispatcher.http:HttpDispatcher
gnocchi = ceilometer.dispatcher.gnocchi:GnocchiDispatcher