deb-ceilometer/ceilometer/notifier.py
Julien Danjou cc65556ed6 Switch to oslo.context library
Change-Id: I2eba3c17eb5b3a16d84c268b9e4999c48635ac2b
2014-12-19 12:49:56 +03:00

72 lines
2.0 KiB
Python

#
# Copyright 2013 eNovance
#
# 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_context import context as req_context
from stevedore import extension
from ceilometer.i18n import _
from ceilometer.openstack.common import log as logging
from ceilometer import pipeline
from ceilometer import transformer
LOG = logging.getLogger(__name__)
_notification_manager = None
_pipeline_manager = None
def _load_notification_manager():
global _notification_manager, _pipeline_manager
namespace = 'ceilometer.notification'
LOG.debug(_('loading notification handlers from %s'), namespace)
_notification_manager = extension.ExtensionManager(
namespace=namespace,
invoke_on_load=True,
invoke_args=(_pipeline_manager, )
)
if not list(_notification_manager):
LOG.warning(_('Failed to load any notification handlers for %s'),
namespace)
def _load_pipeline_manager():
global _pipeline_manager
_pipeline_manager = pipeline.setup_pipeline(
transformer.TransformerExtensionManager(
'ceilometer.transformer',
),
)
def notify(context, message):
"""Sends a notification as a meter using Ceilometer pipelines."""
if not _pipeline_manager:
_load_pipeline_manager()
if not _notification_manager:
_load_notification_manager()
_notification_manager.map_method(
'to_samples_and_publish',
context=context or req_context.get_admin_context(),
notification=message)