Junxiao Shi
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2016-2023, Regents of the University of California,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University.
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*
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* This file is part of ndn-tools (Named Data Networking Essential Tools).
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* See AUTHORS.md for complete list of ndn-tools authors and contributors.
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*
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* ndn-tools is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* ndn-tools is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* ndn-tools, e.g., in COPYING.md file. If not, see <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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* @author Wentao Shang
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* @author Steve DiBenedetto
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* @author Andrea Tosatto
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* @author Chavoosh Ghasemi
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*/
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#ifndef NDN_TOOLS_CHUNKS_CATCHUNKS_DISCOVER_VERSION_HPP
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#define NDN_TOOLS_CHUNKS_CATCHUNKS_DISCOVER_VERSION_HPP
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#include "options.hpp"
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#include <ndn-cxx/util/signal.hpp>
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namespace ndn::chunks {
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class DataFetcher;
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/**
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* @brief Service for discovering the latest Data version.
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*
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* DiscoverVersion's user is notified once after identifying the latest retrievable version or
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* on failure to find any Data version.
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*/
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class DiscoverVersion
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{
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public:
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DiscoverVersion(Face& face, const Name& prefix, const Options& options);
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/**
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* @brief Signal emitted when the versioned name of Data is found.
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*/
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signal::Signal<DiscoverVersion, Name> onDiscoverySuccess;
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/**
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* @brief Signal emitted when a failure occurs.
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*/
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signal::Signal<DiscoverVersion, std::string> onDiscoveryFailure;
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void
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run();
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private:
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void
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handleData(const Interest& interest, const Data& data);
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private:
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Face& m_face;
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const Name m_prefix;
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const Options& m_options;
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shared_ptr<DataFetcher> m_fetcher;
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};
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} // namespace ndn::chunks
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#endif // NDN_TOOLS_CHUNKS_CATCHUNKS_DISCOVER_VERSION_HPP
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