Source code for aodh.event
#
# Copyright 2015 NEC Corporation.
#
# 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
import oslo_messaging
from oslo_service import service
from aodh.evaluator import event
from aodh import messaging
from aodh import storage
OPTS = [
cfg.StrOpt('event_alarm_topic',
default='alarm.all',
help='The topic that aodh uses for event alarm evaluation.'),
]
[docs]class EventAlarmEndpoint(object):
def __init__(self, evaluator):
self.evaluator = evaluator
[docs] def sample(self, ctxt, publisher_id, event_type, payload, metadata):
# TODO(r-mibu): requeue on error
self.evaluator.evaluate_events(payload)
[docs]class EventAlarmEvaluationService(service.Service):
def __init__(self, conf):
super(EventAlarmEvaluationService, self).__init__()
self.conf = conf
self.storage_conn = storage.get_connection_from_config(self.conf)
self.evaluator = event.EventAlarmEvaluator(self.conf)
[docs] def start(self):
super(EventAlarmEvaluationService, self).start()
self.listener = messaging.get_notification_listener(
messaging.get_transport(self.conf),
[oslo_messaging.Target(topic=self.conf.event_alarm_topic)],
[EventAlarmEndpoint(self.evaluator)])
self.listener.start()
# Add a dummy thread to have wait() working
self.tg.add_timer(604800, lambda: None)
[docs] def stop(self):
self.listener.stop()
self.listener.wait()
super(EventAlarmEvaluationService, self).stop()