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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.
*
*/
/**
*
* declare_queues.cpp
*
* This is one of three programs used to implement XML-based content
* routing in C++.
*
* declare_queues.cpp (this program)
*
* Creates a queue named "message_qaueue" on the broker,
* declares an XML Exchange, subscribes the queue to the XML
* Exchange using an XQuery in the binding, then exits.
*
* xml_producer.cpp
*
* Publishes messages to the XML Exchange.
*
* listener.cpp
*
* Reads messages from the "message_queue" queue.
*/
#include <qpid/client/Connection.h>
#include <qpid/client/Session.h>
#include <cstdlib>
#include <iostream>
using namespace qpid::client;
using namespace qpid::framing;
using std::string;
int main(int argc, char** argv) {
const char* host = argc>1 ? argv[1] : "127.0.0.1";
int port = argc>2 ? atoi(argv[2]) : 5672;
Connection connection;
try {
connection.open(host, port);
Session session = connection.newSession();
//--------- Main body of program --------------------------------------------
// Set up queues, bind them with queries. Note that the XML exchange
// is not in the AMQP specification, so it is called "xml", not "amq.xml".
// Note that the XML exchange is not predeclared in Qpid, it must
// be declared by the application.
session.queueDeclare(arg::queue="message_queue");
session.exchangeDeclare(arg::exchange="xml", arg::type="xml");
// Application message properties are mapped to external variables
// in the XQuery. An XML Exchange can query message properties much
// like JMS, query the XML content of the message, or both.
FieldTable binding;
binding.setString("xquery", "declare variable $control external;"
"./message/id mod 2 = 1 or $control = 'end'");
session.exchangeBind(arg::exchange="xml", arg::queue="message_queue", arg::bindingKey="content_feed", arg::arguments=binding);
//-----------------------------------------------------------------------------
connection.close();
return 0;
} catch(const std::exception& error) {
std::cout << error.what() << std::endl;
}
return 1;
}
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