savepoint_manager.hpp

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/*
 * Copyright (c) 2014-2015, Hewlett-Packard Development Company, LP.
 * This program 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 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * HP designates this particular file as subject to the "Classpath" exception
 * as provided by HP in the LICENSE.txt file that accompanied this code.
 */
#ifndef FOEDUS_SAVEPOINT_SAVEPOINT_MANAGER_HPP_
#define FOEDUS_SAVEPOINT_SAVEPOINT_MANAGER_HPP_
#include "foedus/epoch.hpp"
#include "foedus/fwd.hpp"
#include "foedus/initializable.hpp"
#include "foedus/log/log_id.hpp"
#include "foedus/savepoint/fwd.hpp"
#include "foedus/snapshot/snapshot_id.hpp"
namespace foedus {
namespace savepoint {
class SavepointManager CXX11_FINAL : public virtual Initializable {
 public:
  explicit SavepointManager(Engine* engine);
  ~SavepointManager();

  // Disable default constructors
  SavepointManager() CXX11_FUNC_DELETE;
  SavepointManager(const SavepointManager&) CXX11_FUNC_DELETE;
  SavepointManager& operator=(const SavepointManager&) CXX11_FUNC_DELETE;

  ErrorStack  initialize() CXX11_OVERRIDE;
  bool        is_initialized() const CXX11_OVERRIDE;
  ErrorStack  uninitialize() CXX11_OVERRIDE;

  LoggerSavepointInfo       get_logger_savepoint(log::LoggerId logger_id);

  void get_meta_logger_offsets(uint64_t* oldest_offset, uint64_t* durable_offset) const;
  void change_meta_logger_durable_offset(uint64_t durable_offset);

  Epoch get_initial_current_epoch() const;
  Epoch get_initial_durable_epoch() const;
  Epoch get_earliest_epoch() const;
  Epoch get_saved_durable_epoch() const;
  snapshot::SnapshotId get_latest_snapshot_id() const;
  Epoch get_latest_snapshot_epoch() const;

  ErrorStack      take_savepoint(Epoch new_global_durable_epoch);

  ErrorStack      take_savepoint_after_snapshot(
    snapshot::SnapshotId new_snapshot_id,
    Epoch new_snapshot_epoch);

 private:
  SavepointManagerPimpl *pimpl_;
};
}  // namespace savepoint
}  // namespace foedus
#endif  // FOEDUS_SAVEPOINT_SAVEPOINT_MANAGER_HPP_