Qpid Proton C++ API  0.37.0

A variant of the server part of a request-response example that accepts incoming connections and does not need an intermediary. Much like the original server, it receives incoming requests, converts the body to uppercase and sends the result back to the indicated reply address. Can be used in conjunction with any of the client alternatives.

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#include "options.hpp"
#include <iostream>
#include <map>
#include <string>
#include <sstream>
#include <cctype>
class server : public proton::messaging_handler {
class listener_ready_handler : public proton::listen_handler {
void on_open(proton::listener& l) override {
std::cout << "listening on " << l.port() << std::endl;
typedef std::map<std::string, proton::sender> sender_map;
listener_ready_handler listen_handler;
std::string url;
sender_map senders;
int address_counter;
server(const std::string &u) : url(u), address_counter(0) {}
c.listen(url, listen_handler);
std::string to_upper(const std::string &s) {
std::string uc(s);
size_t l = uc.size();
for (size_t i=0; i<l; i++)
uc[i] = static_cast<char>(std::toupper(uc[i]));
return uc;
std::string generate_address() {
std::ostringstream addr;
addr << "server" << address_counter++;
return addr.str();
void on_sender_open(proton::sender &sender) override {
if (sender.source().dynamic()) {
std::string addr = generate_address();
senders[addr] = sender;
std::cout << "Received " << m.body() << std::endl;
std::string reply_to = m.reply_to();
sender_map::iterator it = senders.find(reply_to);
if (it == senders.end()) {
std::cout << "No link for reply_to: " << reply_to << std::endl;
} else {
proton::sender sender = it->second;
int main(int argc, char **argv) {
std::string address("amqp://");
example::options opts(argc, argv);
opts.add_value(address, 'a', "address", "listen on URL", "URL");
try {
server srv(address);
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;
A top-level container of connections, sessions, and links.
Definition: container.hpp:49
void run()
Run the container in the current thread.
listener listen(const std::string &listen_url, listen_handler &handler)
Listen for new connections on listen_url.
A received message.
Definition: delivery.hpp:40
Unsettled API - A handler for incoming connections.
Definition: listen_handler.hpp:39
A listener for incoming connections.
Definition: listener.hpp:33
int port()
Unsettedled API
An AMQP message.
Definition: message.hpp:48
void to(const std::string &)
Set the destination address.
void reply_to(const std::string &)
Set the address for replies.
void correlation_id(const message_id &)
Set the ID for matching related messages.
void body(const value &x)
Set the body. Equivalent to body() = x.
Handler for Proton messaging events.
Definition: messaging_handler.hpp:69
virtual void on_message(delivery &, message &)
A message is received.
virtual void on_container_start(container &)
The container event loop is starting.
virtual void on_sender_open(sender &)
The remote peer opened the link.
Options for creating a sender.
Definition: sender_options.hpp:60
A channel for sending messages.
Definition: sender.hpp:40
tracker send(const message &m)
Send a message on the sender.
class source source() const
Get the source node.
void open()
Open the sender.
Options for creating a source node for a sender or receiver.
Definition: source_options.hpp:46
bool dynamic() const
True if the remote node is created dynamically.
A top-level container of connections, sessions, and links.
Unsettled API - A handler for incoming connections.
A listener for incoming connections.
An AMQP message.
An AMQP message ID.
Handler for Proton messaging events.
A channel for sending messages.
Options for creating a sender.
Options for creating a source node for a sender or receiver.
A tracker for a sent message.