a5785c1e9b
This change modify the loading of the publisher so it's driver based, like our current storage model. That will allow to use the same publisher multiple times with different parameters in the future. This change also adds a new publisher called 'test' that comes from a factorisation of some of the testing code. Blueprint: pipeline-publisher-url Change-Id: Ie26beac213383fff2db759e2df216ba1f454ef9c Signed-off-by: Julien Danjou <julien@danjou.info>
94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2013 Julien Danjou
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#
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# Author: Julien Danjou <julien@danjou.info>
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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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import abc
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import itertools
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from oslo.config import cfg
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from ceilometer.openstack.common import context
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from ceilometer.openstack.common import log
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from ceilometer import pipeline
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from ceilometer import transformer
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LOG = log.getLogger(__name__)
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class PollingTask(object):
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"""Polling task for polling counters and inject into pipeline
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A polling task can be invoked periodically or only once"""
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def __init__(self, agent_manager):
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self.manager = agent_manager
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self.pollsters = set()
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self.publish_context = pipeline.PublishContext(
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agent_manager.context,
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cfg.CONF.counter_source)
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def add(self, pollster, pipelines):
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self.publish_context.add_pipelines(pipelines)
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self.pollsters.update([pollster])
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@abc.abstractmethod
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def poll_and_publish(self):
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"""Polling counter and publish into pipeline."""
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class AgentManager(object):
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def __init__(self, extension_manager):
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self.pipeline_manager = pipeline.setup_pipeline(
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transformer.TransformerExtensionManager(
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'ceilometer.transformer',
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),
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)
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self.pollster_manager = extension_manager
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self.context = context.RequestContext('admin', 'admin', is_admin=True)
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@abc.abstractmethod
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def create_polling_task(self):
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"""Create an empty polling task."""
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def setup_polling_tasks(self):
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polling_tasks = {}
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for pipeline, pollster in itertools.product(
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self.pipeline_manager.pipelines,
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self.pollster_manager.extensions):
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for counter in pollster.obj.get_counter_names():
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if pipeline.support_counter(counter):
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polling_task = polling_tasks.get(pipeline.interval, None)
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if not polling_task:
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polling_task = self.create_polling_task()
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polling_tasks[pipeline.interval] = polling_task
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polling_task.add(pollster, [pipeline])
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break
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return polling_tasks
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def initialize_service_hook(self, service):
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self.service = service
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for interval, task in self.setup_polling_tasks().iteritems():
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self.service.tg.add_timer(interval,
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self.interval_task,
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task=task)
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def interval_task(self, task):
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task.poll_and_publish()
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