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