simple_send.cpp

An example of sending a fixed number of messages and tracking their (asynchronous) acknowledgement.

An example of sending a fixed number of messages and tracking their (asynchronous) acknowledgement. Messages are sent through the 'examples' node on an intermediary accessible on 127.0.0.1:5672.

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 * 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
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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#include "options.hpp"
 
#include <proton/connection.hpp>
#include <proton/connection_options.hpp>
#include <proton/container.hpp>
#include <proton/message.hpp>
#include <proton/message_id.hpp>
#include <proton/messaging_handler.hpp>
#include <proton/reconnect_options.hpp>
#include <proton/tracker.hpp>
#include <proton/types.hpp>
 
#include <iostream>
#include <map>
 
 
class simple_send : public proton::messaging_handler {
  private:
    std::string url;
    std::string user;
    std::string password;
    bool reconnect;
    proton::sender sender;
    int sent;
    int confirmed;
    int total;
 
  public:
    simple_send(const std::string &s, const std::string &u, const std::string &p, bool r, int c) :
        url(s), user(u), password(p), reconnect(r), sent(0), confirmed(0), total(c) {}
 
    void on_container_start(proton::container &c) override {
        proton::connection_options co;
        if (!user.empty()) co.user(user);
        if (!password.empty()) co.password(password);
        if (reconnect) co.reconnect(proton::reconnect_options());
        sender = c.open_sender(url, co);
    }
 
    void on_connection_open(proton::connection& c) override {
        if (c.reconnected()) {
            sent = confirmed;   // Re-send unconfirmed messages after a reconnect
        }
    }
 
    void on_sendable(proton::sender &s) override {
        while (s.credit() && sent < total) {
            proton::message msg;
            std::map<std::string, int> m;
            m["sequence"] = sent + 1;
 
            msg.id(sent + 1);
            msg.body(m);
 
            s.send(msg);
            sent++;
        }
    }
 
    void on_tracker_accept(proton::tracker &t) override {
        confirmed++;
 
        if (confirmed == total) {
            std::cout << "all messages confirmed" << std::endl;
            t.connection().close();
        }
    }
 
    void on_transport_close(proton::transport &) override {
        sent = confirmed;
    }
};
 
int main(int argc, char **argv) {
    std::string address("127.0.0.1:5672/examples");
    std::string user;
    std::string password;
    bool reconnect = false;
    int message_count = 100;
    example::options opts(argc, argv);
 
    opts.add_value(address, 'a', "address", "connect and send to URL", "URL");
    opts.add_value(user, 'u', "user", "authenticate as USER", "USER");
    opts.add_value(password, 'p', "password", "authenticate with PASSWORD", "PASSWORD");
    opts.add_flag(reconnect, 'r', "reconnect", "reconnect on connection failure");
    opts.add_value(message_count, 'm', "messages", "send COUNT messages", "COUNT");
 
    try {
        opts.parse();
 
        simple_send send(address, user, password, reconnect, message_count);
        proton::container(send).run();
 
        return 0;
    } catch (const example::bad_option& e) {
        std::cout << opts << std::endl << e.what() << std::endl;
    } catch (const std::exception& e) {
        std::cerr << e.what() << std::endl;
    }
 
    return 1;
}