deb-ceilometer/ceilometer/notification.py
Mehdi Abaakouk 253d99026e Don't keep a single global TRANSPORT object
To keep the global state of messaging like the old olso-incubator
library does, we have created a global TRANSPORT object.

But since the test use the fake:// driver of oslo.messaging in tests,
this transport is shared between tests, but some tests use 'fake://',
other the default one, and someother disable the transport.

This change ensures that a different transport is used for
code tests.

Change-Id: I22317527cc4fb44ea1fb9642586e8cdcbc97030b
2014-06-16 10:31:13 +02:00

115 lines
4.1 KiB
Python

#
# Copyright 2012-2013 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 oslo.config import cfg
from stevedore import extension
from ceilometer.event import endpoint as event_endpoint
from ceilometer import messaging
from ceilometer.openstack.common.gettextutils import _
from ceilometer.openstack.common import log
from ceilometer.openstack.common import service as os_service
from ceilometer import pipeline
LOG = log.getLogger(__name__)
OPTS = [
cfg.BoolOpt('ack_on_event_error',
default=True,
deprecated_group='collector',
help='Acknowledge message when event persistence fails.'),
cfg.BoolOpt('store_events',
deprecated_group='collector',
default=False,
help='Save event details.'),
cfg.MultiStrOpt('messaging_urls',
default=[],
help="Messaging URLs to listen for notifications. "
"Example: transport://user:pass@host1:port"
"[,hostN:portN]/virtual_host "
"(DEFAULT/transport_url is used if empty)"),
]
cfg.CONF.register_opts(OPTS, group="notification")
class NotificationService(os_service.Service):
NOTIFICATION_NAMESPACE = 'ceilometer.notification'
@classmethod
def _get_notifications_manager(cls, pm):
return extension.ExtensionManager(
namespace=cls.NOTIFICATION_NAMESPACE,
invoke_on_load=True,
invoke_args=(pm, )
)
def start(self):
super(NotificationService, self).start()
# FIXME(sileht): endpoint use notification_topics option
# and it should not because this is oslo.messaging option
# not a ceilometer, until we have a something to get
# the notification_topics in an other way
# we must create a transport to ensure the option have
# beeen registered by oslo.messaging
transport = messaging.get_transport()
messaging.get_notifier(transport, '')
self.pipeline_manager = pipeline.setup_pipeline()
self.notification_manager = self._get_notifications_manager(
self.pipeline_manager)
if not list(self.notification_manager):
LOG.warning(_('Failed to load any notification handlers for %s'),
self.NOTIFICATION_NAMESPACE)
ack_on_error = cfg.CONF.notification.ack_on_event_error
endpoints = []
if cfg.CONF.notification.store_events:
endpoints = [event_endpoint.EventsNotificationEndpoint()]
targets = []
for ext in self.notification_manager:
handler = ext.obj
LOG.debug(_('Event types from %(name)s: %(type)s'
' (ack_on_error=%(error)s)') %
{'name': ext.name,
'type': ', '.join(handler.event_types),
'error': ack_on_error})
targets.extend(handler.get_targets(cfg.CONF))
endpoints.append(handler)
urls = cfg.CONF.notification.messaging_urls or [None]
self.listeners = []
for url in urls:
transport = messaging.get_transport(url)
listener = messaging.get_notification_listener(
transport, targets, endpoints)
listener.start()
self.listeners.append(listener)
# Add a dummy thread to have wait() working
self.tg.add_timer(604800, lambda: None)
def stop(self):
map(lambda x: x.stop(), self.listeners)
super(NotificationService, self).stop()