f67bce40fb
H405 is a new rule in hacking 0.9, so fix new violations and re-enable gating. Change-Id: I61541fa0a9dc18ad938df54d56c65c972b151622
55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
#
|
|
# Copyright 2012 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
"""Base class for plugins used by the compute agent.
|
|
"""
|
|
|
|
import abc
|
|
import six
|
|
|
|
from ceilometer.openstack.common import timeutils
|
|
from ceilometer import plugin
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class ComputePollster(plugin.PollsterBase):
|
|
"""Base class for plugins.
|
|
|
|
It supports the polling API on the compute node.
|
|
"""
|
|
|
|
@abc.abstractmethod
|
|
def get_samples(self, manager, cache, resources):
|
|
"""Return a sequence of Counter instances from polling the resources.
|
|
|
|
:param manager: The service manager invoking the plugin
|
|
:param cache: A dictionary for passing data between plugins
|
|
:param resources: The resources to examine (expected to be instances)
|
|
"""
|
|
|
|
def _record_poll_time(self):
|
|
"""Method records current time as the poll time.
|
|
|
|
:return: time in seconds since the last poll time was recorded
|
|
"""
|
|
current_time = timeutils.utcnow()
|
|
duration = None
|
|
if hasattr(self, '_last_poll_time'):
|
|
duration = timeutils.delta_seconds(self._last_poll_time,
|
|
current_time)
|
|
self._last_poll_time = current_time
|
|
return duration
|