9335d81316
Changes the agent manager to poll based on pipeline configuration, to support different interval requirement from different publishers. This patch clean up the test case for agent managers. It makes the changes a bit bigger, however, it's not so easy to seprate this cleanup patch with different interval part. For bp publisher-counters-frequency Change-Id: I3c1163e37de6a17261d2c570843845696ebff58f Signed-off-by: Yunhong, Jiang <yunhong.jiang@intel.com>
95 lines
3.1 KiB
Python
95 lines
3.1 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 stevedore import dispatch
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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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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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publisher_manager = dispatch.NameDispatchExtensionManager(
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namespace=pipeline.PUBLISHER_NAMESPACE,
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check_func=lambda x: True,
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invoke_on_load=True,
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)
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self.pipeline_manager = pipeline.setup_pipeline(publisher_manager)
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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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