vmware-nsx/quantum/agent/rpc.py
Mark McClain a055ef3dc1 Convert DHCP from polling to RPC
blueprint non-polling-dhcp-impl

This requires a change to devstack/stack.sh.
See https://review.openstack.org/#/c/11278/ for the required changes.

Change-Id: I1ea22c8e1b80e630bcb83f27a31aaeef482aff6c
2012-08-14 12:28:54 -04:00

109 lines
3.7 KiB
Python

# Copyright (c) 2012 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import eventlet
from quantum.common import topics
from quantum.openstack.common import rpc
from quantum.openstack.common.rpc import proxy
from quantum.openstack.common.notifier import api
from quantum.openstack.common.notifier import rabbit_notifier
LOG = logging.getLogger(__name__)
def create_consumers(dispatcher, prefix, topic_details):
"""Create agent RPC consumers.
:param dispatcher: The dispatcher to process the incoming messages.
:param prefix: Common prefix for the plugin/agent message queues.
:param topic_details: A list of topics. Each topic has a name and a
operation.
:returns: A common Connection.
"""
connection = rpc.create_connection(new=True)
for topic, operation in topic_details:
topic_name = topics.get_topic_name(prefix, topic, operation)
connection.create_consumer(topic_name, dispatcher, fanout=True)
connection.consume_in_thread()
return connection
class PluginApi(proxy.RpcProxy):
'''Agent side of the rpc API.
API version history:
1.0 - Initial version.
'''
BASE_RPC_API_VERSION = '1.0'
def __init__(self, topic):
super(PluginApi, self).__init__(
topic=topic, default_version=self.BASE_RPC_API_VERSION)
def get_device_details(self, context, device, agent_id):
return self.call(context,
self.make_msg('get_device_details', device=device,
agent_id=agent_id),
topic=self.topic)
def update_device_down(self, context, device, agent_id):
return self.call(context,
self.make_msg('update_device_down', device=device,
agent_id=agent_id),
topic=self.topic)
def tunnel_sync(self, context, tunnel_ip):
return self.call(context,
self.make_msg('tunnel_sync', tunnel_ip=tunnel_ip),
topic=self.topic)
class NotificationDispatcher(object):
def __init__(self):
# Set the Queue size to 1 so that messages stay on server rather than
# being buffered in the process.
self.queue = eventlet.queue.Queue(1)
self.connection = rpc.create_connection(new=True)
topic = '%s.%s' % (rabbit_notifier.CONF.notification_topics[0],
api.CONF.default_notification_level.lower())
self.connection.declare_topic_consumer(topic=topic,
callback=self._add_to_queue)
self.connection.consume_in_thread()
def _add_to_queue(self, msg):
self.queue.put(msg)
def run_dispatch(self, handler):
while True:
msg = self.queue.get()
name = msg['event_type'].replace('.', '_')
try:
if hasattr(handler, name):
getattr(handler, name)(msg['payload'])
else:
LOG.debug('Unknown event_type: %s.' % msg['event_type'])
except Exception, e:
LOG.warn('Error processing message. Exception: %s' % e)