log_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_LOG_LOG_MANAGER_HPP_
#define FOEDUS_LOG_LOG_MANAGER_HPP_
#include <stdint.h>

#include "foedus/epoch.hpp"
#include "foedus/fwd.hpp"
#include "foedus/initializable.hpp"
#include "foedus/log/fwd.hpp"
#include "foedus/log/log_id.hpp"
#include "foedus/log/logger_ref.hpp"
#include "foedus/savepoint/fwd.hpp"

namespace foedus {
namespace log {
class LogManager CXX11_FINAL : public virtual Initializable {
 public:
  explicit LogManager(Engine* engine);
  ~LogManager();

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

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

  void        copy_logger_states(savepoint::Savepoint *new_savepoint);

  void        wakeup_loggers();

  LoggerRef   get_logger(LoggerId logger_id);

  Epoch       get_durable_global_epoch() const;
  Epoch       get_durable_global_epoch_weak() const;
  void        announce_new_durable_global_epoch(Epoch new_epoch);

  ErrorCode   wait_until_durable(Epoch commit_epoch, int64_t wait_microseconds = -1);

  ErrorStack  refresh_global_durable_epoch();

  MetaLogger*     get_meta_logger();
  MetaLogBuffer*  get_meta_buffer();

 private:
  LogManagerPimpl *pimpl_;
};
}  // namespace log
}  // namespace foedus
#endif  // FOEDUS_LOG_LOG_MANAGER_HPP_