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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2013-2017 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>
*/
// correct way to include ndn-cxx headers
// #include <ndn-cxx/face.hpp>
// #include <ndn-cxx/util/scheduler.hpp>
#include "face.hpp"
#include "util/scheduler.hpp"
#include <boost/asio/io_service.hpp>
#include <iostream>
// Enclosing code in ndn simplifies coding (can also use `using namespace ndn`)
namespace ndn {
// Additional nested namespaces can be used to prevent/limit name conflicts
namespace examples {
class ConsumerWithTimer
{
public:
ConsumerWithTimer()
: m_face(m_ioService) // Create face with io_service object
, m_scheduler(m_ioService)
{
}
void
run()
{
Interest interest(Name("/example/testApp/randomData"));
interest.setInterestLifetime(time::seconds(1));
interest.setMustBeFresh(true);
m_face.expressInterest(interest,
bind(&ConsumerWithTimer::onData, this, _1, _2),
bind(&ConsumerWithTimer::onNack, this, _1, _2),
bind(&ConsumerWithTimer::onTimeout, this, _1));
std::cout << "Sending " << interest << std::endl;
// Schedule a new event
m_scheduler.scheduleEvent(time::seconds(2), [this] { delayedInterest(); });
// m_ioService.run() will block until all events finished or m_ioService.stop() is called
m_ioService.run();
// Alternatively, m_face.processEvents() can also be called.
// processEvents will block until the requested data received or timeout occurs.
// m_face.processEvents();
}
private:
void
onData(const Interest& interest, const Data& data)
{
std::cout << data << std::endl;
}
void
onNack(const Interest& interest, const lp::Nack& nack)
{
std::cout << "received Nack with reason " << nack.getReason()
<< " for interest " << interest << std::endl;
}
void
onTimeout(const Interest& interest)
{
std::cout << "Timeout " << interest << std::endl;
}
void
delayedInterest()
{
std::cout << "One more Interest, delayed by the scheduler" << std::endl;
Interest interest(Name("/example/testApp/randomData"));
interest.setInterestLifetime(time::milliseconds(1000));
interest.setMustBeFresh(true);
m_face.expressInterest(interest,
bind(&ConsumerWithTimer::onData, this, _1, _2),
bind(&ConsumerWithTimer::onNack, this, _1, _2),
bind(&ConsumerWithTimer::onTimeout, this, _1));
std::cout << "Sending " << interest << std::endl;
}
private:
// Explicitly create io_service object, which can be shared between Face and Scheduler
boost::asio::io_service m_ioService;
Face m_face;
Scheduler m_scheduler;
};
} // namespace examples
} // namespace ndn
int
main(int argc, char** argv)
{
ndn::examples::ConsumerWithTimer consumer;
try {
consumer.run();
}
catch (const std::exception& e) {
std::cerr << "ERROR: " << e.what() << std::endl;
}
return 0;
}