cpp/examples/messaging/topic_sender.cpp

/*
 *
 * 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.
 *
 */

#include <qpid/messaging/Connection.h>
#include <qpid/messaging/Message.h>
#include <qpid/messaging/Sender.h>
#include <qpid/messaging/Session.h>

#include <cstdlib>
#include <iostream>

#include <sstream>

using namespace qpid::messaging;

using std::stringstream;
using std::string;

void sendMessages(Sender& sender, int count, const std::string& subject, const std::string& text)
{
    Message message;
    message.setSubject(subject);
    for (int i=0; i<count; i++) {
        stringstream message_data;
        message_data << text << i;
        
        message.setContent(message_data.str());
        sender.send(message);
    }    
}

int main(int argc, char** argv) {
    const char* url = argc>1 ? argv[1] : "amqp:tcp:127.0.0.1:5672";
    int count = argc>2 ? atoi(argv[2]) : 10;

    try {
        Connection connection = Connection::open(url);
        Session session = connection.newSession();
        Sender sender = session.createSender("news_service");

	// Now send some messages to each topic...
        sendMessages(sender, count, "usa.news", "news about the usa");
        sendMessages(sender, count, "usa.weather", "weather report for the usa");
        sendMessages(sender, count, "europe.news", "news about europe");
        sendMessages(sender, count, "europe.weather", "weather report for europe");
	
	// And send a final message to indicate termination.
        Message message("That's all, folks!");
        message.setSubject("control");
        sender.send(message);
        session.sync();
        connection.close();
        return 0;
    } catch(const std::exception& error) {
        std::cout << error.what() << std::endl;
    }
    return 1;
}