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OpenStack Study: rpc.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright (c) 2012 OpenStack Foundation. # All Rights Reserved. # # 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 itertools from neutron.common import topics from neutron.openstack.common import log as logging from neutron.openstack.common import rpc from neutron.openstack.common.rpc import proxy from neutron.openstack.common import timeutils LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** 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, an operation, and an optional host param keying the subscription to topic.host for plugin calls. :returns: A common Connection. """ connection = rpc.create_connection(new=True) for details in topic_details: topic, operation, node_name = itertools.islice( itertools.chain(details, [None]), 3) topic_name = topics.get_topic_name(prefix, topic, operation) connection.create_consumer(topic_name, dispatcher, fanout=True) if node_name: node_topic_name = '%s.%s' % (topic_name, node_name) connection.create_consumer(node_topic_name, dispatcher, fanout=False) connection.consume_in_thread() return connection
**** CubicPower OpenStack Study **** class PluginReportStateAPI(proxy.RpcProxy): BASE_RPC_API_VERSION = '1.0'
**** CubicPower OpenStack Study **** def __init__(self, topic): super(PluginReportStateAPI, self).__init__( topic=topic, default_version=self.BASE_RPC_API_VERSION)
**** CubicPower OpenStack Study **** def report_state(self, context, agent_state, use_call=False): msg = self.make_msg('report_state', agent_state={'agent_state': agent_state}, time=timeutils.strtime()) if use_call: return self.call(context, msg, topic=self.topic) else: return self.cast(context, msg, topic=self.topic)
**** CubicPower OpenStack Study **** class PluginApi(proxy.RpcProxy): '''Agent side of the rpc API. API version history: 1.0 - Initial version. ''' BASE_RPC_API_VERSION = '1.1'
**** CubicPower OpenStack Study **** def __init__(self, topic): super(PluginApi, self).__init__( topic=topic, default_version=self.BASE_RPC_API_VERSION)
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** def update_device_down(self, context, device, agent_id, host=None): return self.call(context, self.make_msg('update_device_down', device=device, agent_id=agent_id, host=host), topic=self.topic)
**** CubicPower OpenStack Study **** def update_device_up(self, context, device, agent_id, host=None): return self.call(context, self.make_msg('update_device_up', device=device, agent_id=agent_id, host=host), topic=self.topic)
**** CubicPower OpenStack Study **** def tunnel_sync(self, context, tunnel_ip, tunnel_type=None): return self.call(context, self.make_msg('tunnel_sync', tunnel_ip=tunnel_ip, tunnel_type=tunnel_type), topic=self.topic)
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