102 lines
3.5 KiB
Python
102 lines
3.5 KiB
Python
# (C) Copyright 2016 Hewlett Packard Enterprise Development LP
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# Copyright 2017 Fujitsu LIMITED
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import time
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from monasca_common.kafka import client_factory
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from monasca_notification.common.repositories import exceptions
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from monasca_notification.common.utils import construct_notification_object
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from monasca_notification.common.utils import get_db_repo
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from monasca_notification.common.utils import get_statsd_client
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from monasca_notification.processors import notification_processor
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log = logging.getLogger(__name__)
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CONF = cfg.CONF
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class PeriodicEngine(object):
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def __init__(self, period):
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self._topic_name = CONF.kafka.periodic[str(period)]
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self._statsd = get_statsd_client()
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self._consumer = client_factory.get_kafka_consumer(
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CONF.kafka.url,
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CONF.kafka.group,
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self._topic_name,
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CONF.zookeeper.url,
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CONF.zookeeper.periodic_path[str(period)],
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CONF.kafka.legacy_kafka_client_enabled)
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self._producer = client_factory.get_kafka_producer(
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CONF.kafka.url,
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CONF.kafka.legacy_kafka_client_enabled)
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self._notifier = notification_processor.NotificationProcessor()
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self._db_repo = get_db_repo()
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self._period = period
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def _keep_sending(self, alarm_id, original_state, period):
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try:
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current_state = self._db_repo.get_alarm_current_state(alarm_id)
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except exceptions.DatabaseException:
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log.debug('Database Error. Attempting reconnect')
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current_state = self._db_repo.get_alarm_current_state(alarm_id)
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# Alarm was deleted
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if current_state is None:
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return False
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# Alarm state changed
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if current_state != original_state:
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return False
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# Period changed
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if period != self._period:
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return False
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return True
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def run(self):
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for raw_notification in self._consumer:
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message = raw_notification.value()
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notification_data = jsonutils.loads(message)
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notification = construct_notification_object(self._db_repo, notification_data)
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if notification is None:
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self._consumer.commit()
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continue
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if self._keep_sending(notification.alarm_id,
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notification.state,
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notification.period):
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wait_duration = notification.period - (
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time.time() - notification_data['notification_timestamp'])
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if wait_duration > 0:
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time.sleep(wait_duration)
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notification.notification_timestamp = time.time()
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self._notifier.send([notification])
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self._producer.publish(self._topic_name,
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[notification.to_json()])
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self._consumer.commit()
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