Erik Olof Gunnar Andersson
097ffec548
This patch removes get_cfg_opts from the plugin class, and moves all configuration directly into designate.conf. There are no changes in the generated configuration due to this patch. Finally, this complets the blueprint to centralize all configuration, and is a follow up to this patch I3be68bf294157631a9bac128df0841220020de96 blueprint centralize-config-designate Change-Id: I007fc004fc533950c5eda3974f41f05c6db5b43f
104 lines
2.7 KiB
Python
104 lines
2.7 KiB
Python
# Copyright 2012 Bouvet ASA
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#
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# Author: Endre Karlson <endre.karlson@bouvet.no>
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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 six
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from stevedore import driver
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from stevedore import enabled
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from oslo_config import cfg
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from oslo_log import log as logging
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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@six.add_metaclass(abc.ABCMeta)
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class Plugin(object):
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__plugin_ns__ = None
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__plugin_name__ = None
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__plugin_type__ = None
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def __init__(self):
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self.name = self.get_canonical_name()
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LOG.debug("Loaded plugin %s", self.name)
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@classmethod
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def get_canonical_name(cls):
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"""
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Return the plugin name
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"""
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type_ = cls.get_plugin_type()
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name = cls.get_plugin_name()
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return "%s:%s" % (type_, name)
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@classmethod
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def get_plugin_name(cls):
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return cls.__plugin_name__
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@classmethod
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def get_plugin_type(cls):
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return cls.__plugin_type__
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class DriverPlugin(Plugin):
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"""
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A Driver plugin is a singleton, where only a single driver will loaded
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at a time.
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For example: Storage implementations (SQLAlchemy)
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"""
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@classmethod
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def get_driver(cls, name):
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"""Load a single driver"""
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LOG.debug('Looking for driver %s in %s', name, cls.__plugin_ns__)
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mgr = driver.DriverManager(cls.__plugin_ns__, name)
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return mgr.driver
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class ExtensionPlugin(Plugin):
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"""
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Extension plugins are loaded as a group, where multiple extensions will
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be loaded and used at the same time.
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For example: Designate Sink handlers
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"""
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@classmethod
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def get_extensions(cls, enabled_extensions=None):
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"""Load a series of extensions"""
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LOG.debug('Looking for extensions in %s' % cls.__plugin_ns__)
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def _check_func(ext):
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if enabled_extensions is None:
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# All extensions are enabled by default, if no specific list
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# is specified
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return True
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return ext.plugin.get_plugin_name() in enabled_extensions
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mgr = enabled.EnabledExtensionManager(
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cls.__plugin_ns__, check_func=_check_func,
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propagate_map_exceptions=True)
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return [e.plugin for e in mgr]
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