64 lines
2.6 KiB
Python
64 lines
2.6 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development LP
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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 neutron.callbacks import events
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from neutron.callbacks import registry
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from neutron.services.trunk import constants as trunk_consts
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from neutron.services.trunk.rpc import server
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LOG = logging.getLogger(__name__)
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class ServerSideRpcBackend(object):
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"""The Neutron Server RPC backend."""
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def __init__(self):
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"""Initialize an RPC backend for the Neutron Server."""
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self._skeleton = server.TrunkSkeleton()
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self._stub = server.TrunkStub()
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# Set up listeners to trunk events: they dispatch RPC messages
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# to agents as needed. These are designed to work with any
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# agent-based driver that may integrate with the trunk service
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# plugin, e.g. linux bridge or ovs.
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for event in (events.AFTER_CREATE, events.AFTER_DELETE):
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registry.subscribe(self.process_event,
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trunk_consts.TRUNK,
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event)
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registry.subscribe(self.process_event,
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trunk_consts.SUBPORTS,
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event)
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LOG.debug("RPC backend initialized for trunk plugin")
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def process_event(self, resource, event, trunk_plugin, payload):
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"""Emit RPC notifications to registered subscribers."""
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context = payload.context
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LOG.debug("RPC notification needed for trunk %s", payload.trunk_id)
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if resource == trunk_consts.SUBPORTS:
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payload = payload.subports
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method = {
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events.AFTER_CREATE: self._stub.subports_added,
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events.AFTER_DELETE: self._stub.subports_deleted,
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}
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elif resource == trunk_consts.TRUNK:
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payload = payload.current_trunk
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method = {
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events.AFTER_CREATE: self._stub.trunk_created,
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events.AFTER_DELETE: self._stub.trunk_deleted,
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}
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LOG.debug("Emitting event %s for resource %s", event, resource)
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method[event](context, payload)
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