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Diffstat (limited to 'qpid/cpp/examples/pub-sub/topic_config_queues.cpp')
-rw-r--r-- | qpid/cpp/examples/pub-sub/topic_config_queues.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/qpid/cpp/examples/pub-sub/topic_config_queues.cpp b/qpid/cpp/examples/pub-sub/topic_config_queues.cpp new file mode 100644 index 0000000000..8c05241f3c --- /dev/null +++ b/qpid/cpp/examples/pub-sub/topic_config_queues.cpp @@ -0,0 +1,128 @@ +/* + * + * 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 <qpid/client/Connection.h> +#include <qpid/client/Session.h> + +#include <unistd.h> +#include <cstdlib> +#include <iostream> + +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; + +} + + + |