5a657dd947
__metaclass__ cannot be used in python3. six be used in general for python 3 compatibility. Change-Id: I1d9909d70bb614c9d1c336d0c492027f5b6b5088 Closes-Bug: #1236648
40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 New Dream Network, LLC (DreamHost)
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#
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# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
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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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"""Base class for plugins used by the compute agent.
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"""
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import abc
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import six
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from ceilometer import plugin
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@six.add_metaclass(abc.ABCMeta)
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class ComputePollster(plugin.PollsterBase):
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"""Base class for plugins that support the polling API on the compute node.
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"""
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@abc.abstractmethod
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def get_samples(self, manager, cache, instance):
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"""Return a sequence of Counter instances from polling the resources.
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:param manager: The service manager invoking the plugin
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:param cache: A dictionary for passing data between plugins
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:param instance: The instance to examine
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"""
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