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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2013-2021 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
* ndn-cxx library is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received copies of the GNU General Public License and GNU Lesser
* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
* <http://www.gnu.org/licenses/>.
*
* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
*
* @author Alexander Afanasyev <http://lasr.cs.ucla.edu/afanasyev/index.html>
*/
#include <ndn-cxx/face.hpp>
#include <iostream>
// Enclosing code in ndn simplifies coding (can also use `using namespace ndn`)
namespace ndn {
// Additional nested namespaces should be used to prevent/limit name conflicts
namespace examples {
class Consumer
{
public:
void
run()
{
Name interestName("/example/testApp/randomData");
interestName.appendVersion();
Interest interest(interestName);
interest.setCanBePrefix(false);
interest.setMustBeFresh(true);
interest.setInterestLifetime(6_s); // The default is 4 seconds
std::cout << "Sending Interest " << interest << std::endl;
m_face.expressInterest(interest,
std::bind(&Consumer::onData, this, _1, _2),
std::bind(&Consumer::onNack, this, _1, _2),
std::bind(&Consumer::onTimeout, this, _1));
// processEvents will block until the requested data is received or a timeout occurs
m_face.processEvents();
}
private:
void
onData(const Interest&, const Data& data) const
{
std::cout << "Received Data " << data << std::endl;
}
void
onNack(const Interest&, const lp::Nack& nack) const
{
std::cout << "Received Nack with reason " << nack.getReason() << std::endl;
}
void
onTimeout(const Interest& interest) const
{
std::cout << "Timeout for " << interest << std::endl;
}
private:
Face m_face;
};
} // namespace examples
} // namespace ndn
int
main(int argc, char** argv)
{
try {
ndn::examples::Consumer consumer;
consumer.run();
return 0;
}
catch (const std::exception& e) {
std::cerr << "ERROR: " << e.what() << std::endl;
return 1;
}
}