# 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. NETWORK = 'network' SUBNET = 'subnet' PORT = 'port' CREATE = 'create' DELETE = 'delete' UPDATE = 'update' AGENT = 'q-agent-notifier' PLUGIN = 'q-plugin' DHCP = 'q-dhcp-notifer' def get_topic_name(prefix, table, operation): """Create a topic name. The topic name needs to be synced between the agent and the plugin. The plugin will send a fanout message to all of the listening agents so that the agents in turn can perform their updates accordingly. :param prefix: Common prefix for the plugin/agent message queues. :param table: The table in question (NETWORK, SUBNET, PORT). :param operation: The operation that invokes notification (CREATE, DELETE, UPDATE) :returns: The topic name. """ return '%s-%s-%s' % (prefix, table, operation)