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/*
*
* 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;
}
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