base.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 "concurrentQueue.hpp"
#include "config.hpp"
#include "tier.hpp"
#include "tools.hpp"
 
#include <boost/filesystem.hpp>
#include <condition_variable>
#include <list>
namespace fs = boost::filesystem;
 
class TierEngineBase {
public:
    TierEngineBase(const fs::path &config_path, const ConfigOverrides &config_overrides);
    virtual ~TierEngineBase(void);
    int create_run_path(void) const;
    std::list<Tier> &get_tiers(void);
    Tier *tier_lookup(fs::path p);
    Tier *tier_lookup(std::string id);
    void mount_point(const fs::path &mount_point);
    virtual bool tier(void);
    virtual bool currently_tiering(void) const;
protected:
    bool stop_flag_;
    std::list<Tier> tiers_; 
    Config config_;         
 
    fs::path run_path_;
    fs::path mount_point_; 
    ConcurrentQueue<AdHoc> adhoc_work_; 
 
    std::condition_variable sleep_cv_;
    std::shared_ptr<rocksdb::DB> db_; 
 
    virtual void exit(int status) const;
};