Qpid Proton C++ API  0.34.0
client.cpp

The client part of a request-response example. Sends requests and prints out responses. Requires an intermediary that supports the AMQP 1.0 dynamic nodes on which the responses are received. The requests are sent through the 'examples' node.

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#include "options.hpp"
#include <iostream>
#include <vector>
#include "fake_cpp11.hpp"
class client : public proton::messaging_handler {
private:
std::string url;
std::vector<std::string> requests;
proton::receiver receiver;
public:
client(const std::string &u, const std::vector<std::string>& r) : url(u), requests(r) {}
sender = c.open_sender(url);
// Create a receiver requesting a dynamically created queue
// for the message source.
receiver_options opts = receiver_options().source(source_options().dynamic(true));
receiver = sender.connection().open_receiver("", opts);
}
void send_request() {
req.body(requests.front());
req.reply_to(receiver.source().address());
sender.send(req);
}
send_request();
}
void on_message(proton::delivery &d, proton::message &response) OVERRIDE {
if (requests.empty()) return; // Spurious extra message!
std::cout << requests.front() << " => " << response.body() << std::endl;
requests.erase(requests.begin());
if (!requests.empty()) {
send_request();
} else {
}
}
};
int main(int argc, char **argv) {
std::string url("127.0.0.1:5672/examples");
example::options opts(argc, argv);
opts.add_value(url, 'a', "address", "connect and send to URL", "URL");
try {
opts.parse();
std::vector<std::string> requests;
requests.push_back("Twas brillig, and the slithy toves");
requests.push_back("Did gire and gymble in the wabe.");
requests.push_back("All mimsy were the borogroves,");
requests.push_back("And the mome raths outgrabe.");
client c(url, requests);
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;
}
proton::receiver::source
class source source() const
Get the source node.
messaging_handler.hpp
Handler for Proton messaging events.
message.hpp
An AMQP message.
tracker.hpp
A tracker for a sent message.
proton::source_options
Options for creating a source node for a sender or receiver.
Definition: source_options.hpp:44
proton::container
A top-level container of connections, sessions, and links.
Definition: container.hpp:50
delivery.hpp
A received message.
proton::messaging_handler::on_container_start
virtual void on_container_start(container &)
The container event loop is starting.
receiver_options.hpp
Options for creating a receiver.
proton::receiver_options
Options for creating a receiver.
Definition: receiver_options.hpp:59
proton::messaging_handler::on_message
virtual void on_message(delivery &, message &)
A message is received.
proton::receiver
A channel for receiving messages.
Definition: receiver.hpp:41
proton::delivery
A received message.
Definition: delivery.hpp:39
proton::connection::close
void close()
Close the connection.
connection.hpp
A connection to a remote AMQP peer.
proton::sender::send
tracker send(const message &m)
Send a message on the sender.
proton::messaging_handler
Handler for Proton messaging events.
Definition: messaging_handler.hpp:69
proton::sender
A channel for sending messages.
Definition: sender.hpp:40
proton::transfer::connection
class connection connection() const
Return the connection for this transfer.
proton::connection::open_receiver
receiver open_receiver(const std::string &addr)
Open a receiver for addr on default_session().
source_options.hpp
Options for creating a source node for a sender or receiver.
proton::messaging_handler::on_receiver_open
virtual void on_receiver_open(receiver &)
The remote peer opened the link.
proton::message::body
void body(const value &x)
Set the body. Equivalent to body() = x.
proton::message::reply_to
void reply_to(const std::string &)
Set the address for replies.
proton::container::run
void run()
Run the container in the current thread.
container.hpp
A top-level container of connections, sessions, and links.
proton::source::address
std::string address() const
The address of the source.
proton::container::open_sender
returned< sender > open_sender(const std::string &addr_url)
Open a connection and sender for addr_url.
proton::message
An AMQP message.
Definition: message.hpp:50