/* * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. * */ /** * topic_config_queues.cpp * * This program is one of three programs designed to be used * together. These programs use the topic exchange. * * topic_config_queues.cpp (this program): * * Creates a queue on a broker, binding a routing key to route * messages to that queue. * * topic_publisher.cpp: * * Publishes to a broker, specifying a routing key. * * topic_listener.cpp * * Reads from a queue on the broker using a message listener. * */ #include #include #include #include #include using namespace qpid::client; using namespace qpid::framing; using std::string; int main() { Connection connection; Message msg; try { connection.open("127.0.0.1", 5672); Session session = connection.newSession(); //--------- Main body of program -------------------------------------------- /* A consumer application reads from the queue, and needs no * knowledge of the exchanges used to route messages to the * queue, or of the routing keys. * * A publisher application writes to the exchange, providing a * routing key, It needs no knowledge of the queues or bindings * used to route messages to consumers. */ /* Create queues on the broker. */ session.queueDeclare(arg::queue="news_queue"); session.queueDeclare(arg::queue="weather_queue"); session.queueDeclare(arg::queue="usa_queue"); session.queueDeclare(arg::queue="europe_queue"); /* Bind these queues using routing keys, so messages will be delivered to the right queues. */ session.queueBind(arg::exchange="amq.topic", arg::queue="news_queue", arg::routingKey="#.news"); session.queueBind(arg::exchange="amq.topic", arg::queue="weather_queue", arg::routingKey="#.weather"); session.queueBind(arg::exchange="amq.topic", arg::queue="usa_queue", arg::routingKey="usa.#"); session.queueBind(arg::exchange="amq.topic", arg::queue="europe_queue", arg::routingKey="europe.#"); /* * We use a separate 'control' routing key for control * messages. All such messages are routed to each queue. In * this demo, we use a message with the content "That's all, * Folks!" to signal that no more messages will be sent, and * users of the queue can stop listening for messages. * * Because wildcard matching can result in more than one match for * a given message, it can place more messages on the queues than * were originally received. * * We do not use wildcard matching for control messages. We * want to make sure that each such message is received once * and only once. */ session.queueBind(arg::exchange="amq.topic", arg::queue="news_queue", arg::routingKey="control"); session.queueBind(arg::exchange="amq.topic", arg::queue="weather_queue", arg::routingKey="control"); session.queueBind(arg::exchange="amq.topic", arg::queue="usa_queue", arg::routingKey="control"); session.queueBind(arg::exchange="amq.topic", arg::queue="europe_queue", arg::routingKey="control"); //----------------------------------------------------------------------------- connection.close(); return 0; } catch(const std::exception& error) { std::cout << error.what() << std::endl; } return 1; }