helloworld.cpp

Connects to a broker on 127.0.0.1:5672, establishes a subscription from the 'examples' node, and creates a sending link to the same node. Sends one message and receives it back.

/*
 *
 * 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 <proton/connection.hpp>
#include <proton/container.hpp>
#include <proton/delivery.hpp>
#include <proton/message.hpp>
#include <proton/messaging_handler.hpp>
#include <proton/tracker.hpp>
 
#include <iostream>
 
 
class hello_world : public proton::messaging_handler {
    std::string conn_url_;
    std::string addr_;
 
  public:
    hello_world(const std::string& u, const std::string& a) :
        conn_url_(u), addr_(a) {}
 
    void on_container_start(proton::container& c) override {
        c.connect(conn_url_);
    }
 
    void on_connection_open(proton::connection& c) override {
        c.open_receiver(addr_);
        c.open_sender(addr_);
    }
 
    void on_sendable(proton::sender &s) override {
        proton::message m("Hello World!");
        s.send(m);
        s.close();
    }
 
    void on_message(proton::delivery &d, proton::message &m) override {
        std::cout << m.body() << std::endl;
        d.connection().close();
    }
};
 
int main(int argc, char **argv) {
    try {
        std::string conn_url = argc > 1 ? argv[1] : "//127.0.0.1:5672";
        std::string addr = argc > 2 ? argv[2] : "examples";
 
        hello_world hw(conn_url, addr);
        proton::container(hw).run();
 
        return 0;
    } catch (const std::exception& e) {
        std::cerr << e.what() << std::endl;
    }
 
    return 1;
}