tiering.hpp

/*
 *    Copyright (C) 2019-2021 Joshua Boudreau <jboudreau@45drives.com>
 *
 *    This file is part of autotier.
 *
 *    autotier is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    autotier 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with autotier.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include "adhoc.hpp"
#include "database.hpp"
#include "mutex.hpp"
#include "sleep.hpp"
 
#include <chrono>
 
class TierEngineTiering
    : public TierEngineDatabase
    , public TierEngineSleep
    , public TierEngineAdhoc
    , public TierEngineMutex {
public:
    TierEngineTiering(const fs::path &config_path, const ConfigOverrides &config_overrides);
    ~TierEngineTiering(void);
    void begin(bool daemon_mode);
    bool tier(void);
    void launch_crawlers(void (TierEngineTiering::*function)(
        fs::directory_entry &itr, Tier *tptr, std::atomic<ffd::Bytes::bytes_type> &usage));
    void crawl(fs::path dir,
               Tier *tptr,
               void (TierEngineTiering::*function)(fs::directory_entry &itr,
                                                   Tier *tptr,
                                                   std::atomic<ffd::Bytes::bytes_type> &usage),
               std::atomic<ffd::Bytes::bytes_type> &usage);
    void
    emplace_file(fs::directory_entry &file, Tier *tptr, std::atomic<ffd::Bytes::bytes_type> &usage);
    void calc_popularity(void);
    void sort(void);
    void simulate_tier(void);
    void move_files(void);
    void update_db(void);
    void stop(void);
    bool currently_tiering(void) const;
    bool strict_period(void) const;
    void exit(int status);
private:
    bool currently_tiering_; 
    std::chrono::steady_clock::time_point last_tier_time_; 
    std::vector<File> files_; 
};