ShardArchiveHandler.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012, 2013 Ripple Labs Inc.
 
    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.
 
    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
 
#ifndef RIPPLE_RPC_SHARDARCHIVEHANDLER_H_INCLUDED
#define RIPPLE_RPC_SHARDARCHIVEHANDLER_H_INCLUDED
 
#include <ripple/app/main/Application.h>
#include <ripple/basics/BasicConfig.h>
#include <ripple/basics/StringUtilities.h>
#include <ripple/net/DatabaseDownloader.h>
 
#include <boost/asio/basic_waitable_timer.hpp>
#include <boost/filesystem.hpp>
 
namespace ripple {
namespace test { class ShardArchiveHandler_test; }
namespace RPC {
 
class ShardArchiveHandler
    : public Stoppable
    , public std::enable_shared_from_this <ShardArchiveHandler>
{
public:
 
    using pointer = std::shared_ptr<ShardArchiveHandler>;
    friend class test::ShardArchiveHandler_test;
 
    static
    boost::filesystem::path
    getDownloadDirectory(Config const& config);
 
    static
    pointer
    getInstance();
 
    static
    pointer
    getInstance(Application& app, Stoppable& parent);
 
    static
    pointer
    recoverInstance(Application& app, Stoppable& parent);
 
    static
    bool
    hasInstance();
 
    bool
    init();
 
    bool
    initFromDB();
 
    ~ShardArchiveHandler() = default;
 
    bool
    add(std::uint32_t shardIndex, std::pair<parsedURL, std::string>&& url);
 
    bool
    start();
 
    void
    release();
 
private:
 
    ShardArchiveHandler() = delete;
    ShardArchiveHandler(ShardArchiveHandler const&) = delete;
    ShardArchiveHandler& operator= (ShardArchiveHandler&&) = delete;
    ShardArchiveHandler& operator= (ShardArchiveHandler const&) = delete;
 
    ShardArchiveHandler(
        Application& app,
        Stoppable& parent,
        bool recovery = false);
 
    void onStop () override;
 
    bool
    add(std::uint32_t shardIndex, parsedURL&& url,
        std::lock_guard<std::mutex> const&);
 
    // Begins the download and import of the next archive.
    bool
    next(std::lock_guard<std::mutex>& l);
 
    // Callback used by the downloader to notify completion of a download.
    void
    complete(boost::filesystem::path dstPath);
 
    // Extract a downloaded archive and import it into the shard store.
    void
    process(boost::filesystem::path const& dstPath);
 
    // Remove the archive being processed.
    void
    remove(std::lock_guard<std::mutex>&);
 
    void
    doRelease(std::lock_guard<std::mutex> const&);
 
    static std::mutex instance_mutex_;
    static pointer instance_;
 
    std::mutex mutable m_;
    Application& app_;
    beast::Journal const j_;
    std::unique_ptr<DatabaseCon> sqliteDB_;
    std::shared_ptr<DatabaseDownloader> downloader_;
    boost::filesystem::path const downloadDir_;
    boost::asio::basic_waitable_timer<std::chrono::steady_clock> timer_;
    bool process_;
    std::map<std::uint32_t, parsedURL> archives_;
};
 
} // RPC
} // ripple
 
#endif