86 lines
3.2 KiB
Python
86 lines
3.2 KiB
Python
# Copyright (c) 2015 Mellanox Technologies, Ltd
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# All Rights Reserved.
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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_config import cfg
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from oslo_log import log
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import stevedore
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from neutron._i18n import _, _LE, _LI
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LOG = log.getLogger(__name__)
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L2_AGENT_EXT_MANAGER_NAMESPACE = 'neutron.agent.l2.extensions'
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L2_AGENT_EXT_MANAGER_OPTS = [
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cfg.ListOpt('extensions',
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default=[],
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help=_('Extensions list to use')),
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]
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def register_opts(conf):
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conf.register_opts(L2_AGENT_EXT_MANAGER_OPTS, 'agent')
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class AgentExtensionsManager(stevedore.named.NamedExtensionManager):
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"""Manage agent extensions."""
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def __init__(self, conf):
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super(AgentExtensionsManager, self).__init__(
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L2_AGENT_EXT_MANAGER_NAMESPACE, conf.agent.extensions,
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invoke_on_load=True, name_order=True)
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LOG.info(_LI("Loaded agent extensions: %s"), self.names())
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def initialize(self, connection, driver_type):
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"""Initialize enabled L2 agent extensions.
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:param connection: RPC connection that can be reused by extensions to
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define their RPC endpoints
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:param driver_type: a string that defines the agent type to the
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extension. Can be used by the extension to choose
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the right backend implementation.
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"""
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# Initialize each agent extension in the list.
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for extension in self:
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LOG.info(_LI("Initializing agent extension '%s'"), extension.name)
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extension.obj.initialize(connection, driver_type)
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def handle_port(self, context, data):
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"""Notify all agent extensions to handle port."""
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for extension in self:
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try:
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extension.obj.handle_port(context, data)
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# TODO(QoS) add agent extensions exception and catch them here
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except AttributeError:
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LOG.exception(
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_LE("Agent Extension '%(name)s' failed "
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"while handling port update"),
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{'name': extension.name}
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)
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def delete_port(self, context, data):
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"""Notify all agent extensions to delete port."""
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for extension in self:
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try:
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extension.obj.delete_port(context, data)
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# TODO(QoS) add agent extensions exception and catch them here
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# instead of AttributeError
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except AttributeError:
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LOG.exception(
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_LE("Agent Extension '%(name)s' failed "
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"while handling port deletion"),
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{'name': extension.name}
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)
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