133 lines
4.0 KiB
C++
133 lines
4.0 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2013-2021 Regents of the University of California.
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*
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* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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*
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* ndn-cxx library is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received copies of the GNU General Public License and GNU Lesser
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* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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*/
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#include <ndn-cxx/face.hpp>
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#include <ndn-cxx/util/scheduler.hpp>
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#include <boost/asio/io_service.hpp>
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#include <iostream>
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// Enclosing code in ndn simplifies coding (can also use `using namespace ndn`)
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namespace ndn {
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// Additional nested namespaces should be used to prevent/limit name conflicts
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namespace examples {
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class ConsumerWithTimer
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{
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public:
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ConsumerWithTimer()
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: m_face(m_ioService) // Create face with io_service object
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, m_scheduler(m_ioService)
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{
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}
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void
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run()
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{
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Name interestName("/example/testApp/randomData");
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interestName.appendVersion();
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Interest interest(interestName);
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interest.setCanBePrefix(false);
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interest.setMustBeFresh(true);
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interest.setInterestLifetime(2_s);
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std::cout << "Sending Interest " << interest << std::endl;
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m_face.expressInterest(interest,
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std::bind(&ConsumerWithTimer::onData, this, _1, _2),
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std::bind(&ConsumerWithTimer::onNack, this, _1, _2),
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std::bind(&ConsumerWithTimer::onTimeout, this, _1));
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// Schedule a new event
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m_scheduler.schedule(3_s, [this] { delayedInterest(); });
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// m_ioService.run() will block until all events finished or m_ioService.stop() is called
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m_ioService.run();
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// Alternatively, m_face.processEvents() can also be called.
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// processEvents will block until the requested data received or timeout occurs.
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// m_face.processEvents();
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}
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private:
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void
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onData(const Interest&, const Data& data) const
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{
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std::cout << "Received Data " << data << std::endl;
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}
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void
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onNack(const Interest& interest, const lp::Nack& nack) const
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{
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std::cout << "Received Nack with reason " << nack.getReason()
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<< " for " << interest << std::endl;
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}
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void
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onTimeout(const Interest& interest) const
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{
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std::cout << "Timeout for " << interest << std::endl;
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}
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void
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delayedInterest()
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{
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std::cout << "One more Interest, delayed by the scheduler" << std::endl;
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Name interestName("/example/testApp/randomData");
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interestName.appendVersion();
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Interest interest(interestName);
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interest.setCanBePrefix(false);
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interest.setMustBeFresh(true);
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interest.setInterestLifetime(2_s);
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std::cout << "Sending Interest " << interest << std::endl;
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m_face.expressInterest(interest,
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std::bind(&ConsumerWithTimer::onData, this, _1, _2),
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std::bind(&ConsumerWithTimer::onNack, this, _1, _2),
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std::bind(&ConsumerWithTimer::onTimeout, this, _1));
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}
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private:
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// Explicitly create io_service object, which will be shared between Face and Scheduler
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boost::asio::io_service m_ioService;
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Face m_face;
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Scheduler m_scheduler;
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};
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} // namespace examples
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} // namespace ndn
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int
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main(int argc, char** argv)
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{
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try {
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ndn::examples::ConsumerWithTimer consumer;
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consumer.run();
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return 0;
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}
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catch (const std::exception& e) {
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std::cerr << "ERROR: " << e.what() << std::endl;
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return 1;
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}
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}
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