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#
# 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 urllib import parse as urlparse
from ceilometer import keystone_client
from ceilometer import publisher
from zaqarclient.queues.v2 import client as zaqarclient
DEFAULT_TTL = 3600
class ZaqarPublisher(publisher.ConfigPublisherBase):
"""Publish metering data to a Zaqar queue.
The target queue name must be configured in the ceilometer pipeline
configuration file. The TTL can also optionally be specified as a query
argument::
meter:
- name: meter_zaqar
meters:
- "*"
sinks:
- zaqar_sink
sinks:
- name: zaqar_sink
publishers:
- zaqar://?queue=meter_queue&ttl=1200
The credentials to access Zaqar must be set in the [zaqar] section in the
configuration.
"""
def __init__(self, conf, parsed_url):
super(ZaqarPublisher, self).__init__(conf, parsed_url)
options = urlparse.parse_qs(parsed_url.query)
self.queue_name = options.get('queue', [None])[0]
if not self.queue_name:
raise ValueError('Must specify a queue in the zaqar publisher')
self.ttl = int(options.pop('ttl', [DEFAULT_TTL])[0])
self._client = None
@property
def client(self):
if self._client is None:
session = keystone_client.get_session(
self.conf, group=self.conf.zaqar.auth_section)
self._client = zaqarclient.Client(session=session)
return self._client
def publish_samples(self, samples):
"""Send a metering message for publishing
:param samples: Samples from pipeline.
"""
queue = self.client.queue(self.queue_name)
messages = [{'body': sample.as_dict(), 'ttl': self.ttl}
for sample in samples]
queue.post(messages)
def publish_events(self, events):
"""Send an event message for publishing
:param events: events from pipeline.
"""
queue = self.client.queue(self.queue_name)
messages = [{'body': event.serialize(), 'ttl': self.ttl}
for event in events]
queue.post(messages)
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