helloworld_direct.cpp

Variation of helloworld that does not use a broker, but listens for incoming connections itself. It establishes a connection to itself with a link over which a single message is sent. This demonstrates the ease with which a simple daemon an be built using the API.

/*
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* 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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*/
#include <proton/connection.hpp>
#include <proton/default_container.hpp>
#include <proton/messaging_handler.hpp>
#include <proton/sender.hpp>
#include <proton/tracker.hpp>
#include <iostream>
#include "fake_cpp11.hpp"
class hello_world_direct : public proton::messaging_handler {
private:
std::string url;
proton::listener listener;
public:
hello_world_direct(const std::string& u) : url(u) {}
void on_container_start(proton::container &c) OVERRIDE {
listener = c.listen(url);
c.open_sender(url);
}
void on_sendable(proton::sender &s) OVERRIDE {
proton::message m("Hello World!");
s.send(m);
s.close();
}
void on_message(proton::delivery &, proton::message &m) OVERRIDE {
std::cout << m.body() << std::endl;
}
void on_tracker_accept(proton::tracker &t) OVERRIDE {
t.connection().close();
}
void on_connection_close(proton::connection&) OVERRIDE {
listener.stop();
}
};
int main(int argc, char **argv) {
try {
// Pick an "unusual" port since we are going to be talking to
// ourselves, not a broker.
std::string url = argc > 1 ? argv[1] : "127.0.0.1:8888/examples";
hello_world_direct hwd(url);
proton::default_container(hwd).run();
return 0;
} catch (const std::exception& e) {
std::cerr << e.what() << std::endl;
}
return 1;
}