Qpid Proton C++ API  0.18.1
simple_recv.cpp

Subscribes to the 'examples' node on an intermediary accessible on 127.0.0.1:5672. Simply prints out the body of received messages.

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* 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
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* Unless required by applicable law or agreed to in writing,
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#include "options.hpp"
#include <proton/link.hpp>
#include <proton/value.hpp>
#include <iostream>
#include <map>
#include "fake_cpp11.hpp"
class simple_recv : public proton::messaging_handler {
private:
std::string url;
std::string user;
std::string password;
proton::receiver receiver;
int expected;
int received;
public:
simple_recv(const std::string &s, const std::string &u, const std::string &p, int c) :
url(s), user(u), password(p), expected(c), received(0) {}
if (!user.empty()) co.user(user);
if (!password.empty()) co.password(password);
receiver = c.open_receiver(url, co);
std::cout << "simple_recv listening on " << url << std::endl;
}
void on_message(proton::delivery &d, proton::message &msg) OVERRIDE {
if (proton::coerce<int>(msg.id()) < received) {
return; // Ignore duplicate
}
if (expected == 0 || received < expected) {
std::cout << msg.body() << std::endl;
received++;
if (received == expected) {
d.receiver().close();
}
}
}
};
int main(int argc, char **argv) {
std::string address("127.0.0.1:5672/examples");
std::string user;
std::string password;
int message_count = 100;
example::options opts(argc, argv);
opts.add_value(address, 'a', "address", "connect to and receive from URL", "URL");
opts.add_value(message_count, 'm', "messages", "receive COUNT messages", "COUNT");
opts.add_value(user, 'u', "user", "authenticate as USER", "USER");
opts.add_value(password, 'p', "password", "authenticate with PASSWORD", "PASSWORD");
try {
opts.parse();
simple_recv recv(address, user, password, message_count);
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;
}