Here's a C++ program that uses the XML exchange. The only x-bindings
argument that is really needed is the xquery, since the subject and the
exchange can be specified as part of standard address syntax. I used a
stringstream to make it easier to write a query and add it to a template
string that creates an address containing that query.
I have a Python program that does the same, using the same address, but
it runs into the bug Gordon reported in
https://issues.apache.org/jira/browse/QPID-2551.
Hope this is helpful!
Jonathan
#include <qpid/messaging/Connection.h>
#include <qpid/messaging/Message.h>
#include <qpid/messaging/Receiver.h>
#include <qpid/messaging/Sender.h>
#include <qpid/messaging/Session.h>
#include <iostream>
#include <sstream>
using std::stringstream;
using namespace qpid::messaging;
int main(int argc, char** argv) {
std::string broker = argc > 1 ? argv[1] : "localhost:5672";
std::string query =
"let $w := ./weather "
"return $w/station = 'Raleigh-Durham International Airport (KRDU)' "
" and $w/temperature_f > 50"
" and $w/temperature_f - $w/dewpoint > 5"
" and $w/wind_speed_mph > 7"
" and $w/wind_speed_mph < 20";
stringstream address;
address << "xml/weather; {"
" link: { "
" x-bindings: [{ arguments: { xquery:\"" << query << "\"} }] "
" } "
"}";
Connection connection(broker);
try {
connection.open();
Session session = connection.createSession();
Receiver receiver = session.createReceiver(address.str());
Message message;
message.setContent(
"<weather>"
"<station>Raleigh-Durham International Airport
(KRDU)</station>"
"<wind_speed_mph>16</wind_speed_mph>"
"<temperature_f>70</temperature_f>"
"<dewpoint>35</dewpoint>"
"</weather>");
Sender sender = session.createSender("xml/weather");
sender.send(message);
Message response = receiver.fetch();
std::cout << response.getContent() << std::endl;
connection.close();
return 0;
} catch(const std::exception& error) {
std::cerr << error.what() << std::endl;
connection.close();
return 1;
}
}
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