99 lines
3.8 KiB
Python
99 lines
3.8 KiB
Python
#
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# Copyright 2015 Red Hat
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log
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import six.moves.urllib.parse as urlparse
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from stevedore import driver
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import stevedore.exception
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from ceilometer import publisher
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from ceilometer.publisher import utils
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LOG = log.getLogger(__name__)
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class DirectPublisher(publisher.ConfigPublisherBase):
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"""A publisher that allows saving directly from the pipeline.
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Samples are saved to a configured dispatcher. This is useful
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where it is desirable to limit the number of external services that
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are required.
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By default, the database dispatcher is used to select another one we
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can use direct://?dispatcher=gnocchi, ...
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"""
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def __init__(self, conf, parsed_url):
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super(DirectPublisher, self).__init__(conf, parsed_url)
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default_dispatcher = parsed_url.scheme
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if default_dispatcher == 'direct':
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LOG.warning('Direct publisher is deprecated for removal. Use '
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'an explicit publisher instead, e.g. "gnocchi", '
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'"database", "file", ...')
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default_dispatcher = 'database'
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options = urlparse.parse_qs(parsed_url.query)
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self.dispatcher_name = options.get('dispatcher',
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[default_dispatcher])[-1]
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self._sample_dispatcher = None
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self._event_dispatcher = None
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try:
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self.sample_driver = driver.DriverManager(
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'ceilometer.dispatcher.meter', self.dispatcher_name).driver
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except stevedore.exception.NoMatches:
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self.sample_driver = None
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try:
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self.event_driver = driver.DriverManager(
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'ceilometer.dispatcher.event', self.dispatcher_name).driver
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except stevedore.exception.NoMatches:
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self.event_driver = None
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def get_sample_dispatcher(self):
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if not self._sample_dispatcher:
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self._sample_dispatcher = self.sample_driver(self.conf)
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return self._sample_dispatcher
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def get_event_dispatcher(self):
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if not self._event_dispatcher:
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if self.event_driver != self.sample_driver:
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self._event_dispatcher = self.event_driver(self.conf)
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else:
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self._event_dispatcher = self.get_sample_dispatcher()
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return self._event_dispatcher
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def publish_samples(self, samples):
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if not self.sample_driver:
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LOG.error("Can't publish samples to a non-existing dispatcher "
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"'%s'", self.dispatcher_name)
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return
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if not isinstance(samples, list):
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samples = [samples]
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# not published externally; skip signing
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self.get_sample_dispatcher().record_metering_data([
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utils.meter_message_from_counter(sample, secret=None)
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for sample in samples])
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def publish_events(self, events):
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if not self.event_driver:
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LOG.error("Can't publish events to a non-existing dispatcher "
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"'%s'", self.dispatcher_name)
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return
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if not isinstance(events, list):
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events = [events]
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# not published externally; skip signing
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self.get_event_dispatcher().record_events([
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utils.message_from_event(event, secret=None) for event in events])
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