Module code

Source code for oio.conscience.stats.beanstalkd

# Copyright (C) 2019 OpenIO SAS, as part of OpenIO SDS
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from oio.common import exceptions as exc
from oio.event.beanstalk import Beanstalk, ConnectionError
from oio.conscience.stats.base import BaseStat


class BeanstalkdStat(BaseStat):
    """Collect statistics about beanstalkd services."""

    stat_keys = {
        'current-tubes': 'stat.tubes',
        'current-jobs-buried': 'stat.jobs_buried',
        'current-jobs-delayed': 'stat.jobs_delayed',
        'current-jobs-ready': 'stat.jobs_ready',
        'current-jobs-reserved': 'stat.jobs_reserved',
        'current-jobs-urgent': 'stat.jobs_urgent',
    }

    def __init__(self, *args, **kwargs):
        super(BeanstalkdStat, self).__init__(*args, **kwargs)
        self._beanstalkd = None
        self._host = None
        self._port = None

    def configure(self):
        super(BeanstalkdStat, self).configure()
        for k in ('host', 'port'):
            if k not in self.stat_conf:
                raise exc.ConfigurationException(
                    'Missing field "%s" in configuration' % k)

    @property
    def beanstalkd(self):
        if self._beanstalkd is None:
            host = self.stat_conf['host']
            port = int(self.stat_conf['port'])
            self._beanstalkd = Beanstalk(host, port)
        return self._beanstalkd

    def get_stats(self):
        stats = dict()
        try:
            all_stats = self.beanstalkd.stats()
            for bkey, skey in self.stat_keys.items():
                stats[skey] = all_stats[bkey]
        except ConnectionError as err:
            self.logger.warn(
                'ERROR connection lost to beanstalkd (%s:%d) %s',
                self._host, self._port, err)
            self._beanstalkd = None
        except Exception as err:
            self.logger.warn('ERROR performing beanstalkd check (%s:%s): %s',
                             self._host, self._port, err)
        finally:
            return stats