103 lines
3.7 KiB
Python
103 lines
3.7 KiB
Python
# Copyright 2018 Beijing Lenovo Software Ltd.
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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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from oslo_log import log as logging
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from stevedore import extension
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import os_acc.exception
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from os_acc.i18n import _
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_EXT_MANAGER = None
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LOG = logging.getLogger(__name__)
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def initialize(reset=False):
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global _EXT_MANAGER
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if reset or (_EXT_MANAGER is None):
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_EXT_MANAGER = extension.ExtensionManager(namespace='os_acc',
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invoke_on_load=False)
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loaded_plugins = []
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for plugin_name in _EXT_MANAGER.names():
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cls = _EXT_MANAGER[plugin_name].plugin
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obj = cls.load(plugin_name)
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LOG.debug(("Loaded ACC plugin class '%(cls)s' "
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"with name '%(plugin_name)s'"),
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{'cls': cls, 'plugin_name': plugin_name})
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loaded_plugins.append(plugin_name)
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_EXT_MANAGER[plugin_name].obj = obj
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LOG.info("Loaded ACC plugins: %s", ", ".join(loaded_plugins))
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def get_config(acc, instance=None, inst_type=None):
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if _EXT_MANAGER is None:
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raise os_acc.exception.LibraryNotInitialized()
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acc_type = acc['type']
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if acc_type is None:
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raise os_acc.exception.InternalError(
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_("acc_type parameter must be present "
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"for this acc_type implementation"))
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try:
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plugin = _EXT_MANAGER[acc_type].obj
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except KeyError:
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raise os_acc.exception.NoMatchingPlugin(plugin_name=acc_type)
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conf = plugin.get_config(acc, instance, inst_type)
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return conf
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def attach(acc, guest=None, host=None, instance=None, inst_type=None):
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if _EXT_MANAGER is None:
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raise os_acc.exception.LibraryNotInitialized()
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acc_type = acc['type']
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if acc_type is None:
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raise os_acc.exception.InternalError(
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_("acc_type parameter must be present "
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"for this acc_type implementation"))
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try:
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plugin = _EXT_MANAGER[acc_type].obj
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except KeyError:
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raise os_acc.exception.NoMatchingPlugin(plugin_name=acc_type)
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try:
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LOG.debug("Attach acc %s", acc)
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plugin.attach(acc, guest, host, instance, inst_type)
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LOG.info("Successfully Attached acc %s", acc)
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except Exception as err:
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LOG.error("Failed to attach acc %(acc)s",
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{"acc": acc}, exc_info=True)
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raise os_acc.exception.AttachException(acc=acc, err=err)
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def detach(acc, guest=None, host=None, instance=None, inst_type=None):
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if _EXT_MANAGER is None:
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raise os_acc.exception.LibraryNotInitialized()
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acc_type = acc['type']
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if acc_type is None:
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raise os_acc.exception.InternalError(
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_("acc_type parameter must be present "
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"for this acc_type implementation"))
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try:
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plugin = _EXT_MANAGER[acc_type].obj
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except KeyError:
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raise os_acc.exception.NoMatchingPlugin(plugin_name=acc_type)
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try:
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LOG.debug("Detaching acc %s", acc)
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plugin.detach(acc, guest, host, instance, inst_type)
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LOG.info("Successfully detached acc %s", acc)
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except Exception as err:
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LOG.error("Failed to unplug acc %(acc)s",
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{"acc": acc}, exc_info=True)
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raise os_acc.exception.DetachException(acc=acc, err=err)
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