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 <proton/connection.hpp>
#include <proton/container.hpp>
#include <proton/delivery.hpp>
#include <proton/message.hpp>
#include <proton/messaging_handler.hpp>
#include <proton/receiver_options.hpp>
#include <proton/source_options.hpp>
#include <proton/tracker.hpp>
#include <iostream>
#include <vector>
#include "fake_cpp11.hpp"
using proton::receiver_options;
using proton::source_options;
class client : public proton::messaging_handler {
private:
std::string url;
std::vector<std::string> requests;
proton::sender sender;
proton::receiver receiver;
public:
client(const std::string &u, const std::vector<std::string>& r) : url(u), requests(r) {}
void on_container_start(proton::container &c) OVERRIDE {
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() {
proton::message req;
req.body(requests.front());
req.reply_to(receiver.source().address());
sender.send(req);
}
void on_receiver_open(proton::receiver &) OVERRIDE {
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 {
d.connection().close();
}
}
};
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);
proton::container(c).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;
}
proton::receiver::source
class source source() const
Get the source node.
messaging_handler.hpp
message.hpp
tracker.hpp
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
proton::link::connection
class connection connection() const
The connection that owns this link.
delivery.hpp
proton::messaging_handler::on_container_start
virtual void on_container_start(container &)
The container event loop is starting.
receiver_options.hpp
proton::receiver_options
Options for creating a receiver.
Definition: receiver_options.hpp:56
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:40
proton::delivery
A received message.
Definition: delivery.hpp:39
proton::connection::close
void close()
Close the endpoint.
connection.hpp
proton::sender::send
tracker send(const message &m)
Send a message on the sender.
proton::messaging_handler
A handler for Proton messaging events.
Definition: messaging_handler.hpp:62
proton::sender
A channel for sending messages.
Definition: sender.hpp:39
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
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
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