76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
#
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# Copyright 2015 Hewlett Packard
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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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from oslo_config import cfg
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from oslo_log import log
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from oslo_service import service as os_service
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import six
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from ceilometer.i18n import _, _LE, _LI
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from ceilometer import pipeline
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LOG = log.getLogger(__name__)
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@six.add_metaclass(abc.ABCMeta)
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class BaseService(os_service.Service):
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def init_pipeline_refresh(self):
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if cfg.CONF.refresh_pipeline_cfg:
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self.pipeline_mtime = pipeline.get_pipeline_mtime()
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self.pipeline_hash = pipeline.get_pipeline_hash()
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self.tg.add_timer(cfg.CONF.pipeline_polling_interval,
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self.refresh_pipeline)
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@abc.abstractmethod
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def reload_pipeline(self):
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"""Reload pipeline in the agents."""
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def refresh_pipeline(self):
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mtime = pipeline.get_pipeline_mtime()
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if mtime > self.pipeline_mtime:
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LOG.info(_LI('Pipeline configuration file has been updated.'))
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self.pipeline_mtime = mtime
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_hash = pipeline.get_pipeline_hash()
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if _hash != self.pipeline_hash:
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LOG.info(_LI("Detected change in pipeline configuration."))
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try:
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# Pipeline in the notification agent.
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if hasattr(self, 'pipeline_manager'):
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self.pipeline_manager = pipeline.setup_pipeline()
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# Polling in the polling agent.
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elif hasattr(self, 'polling_manager'):
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self.polling_manager = pipeline.setup_polling()
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LOG.debug(_("Pipeline has been refreshed. "
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"old hash: %(old)s, new hash: %(new)s") %
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({'old': self.pipeline_hash,
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'new': _hash}))
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except Exception as err:
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LOG.debug(_("Active pipeline config's hash is %s") %
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self.pipeline_hash)
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LOG.exception(_LE('Unable to load changed pipeline: %s')
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% err)
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return
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self.pipeline_hash = _hash
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self.reload_pipeline()
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