log_gleaner_impl.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_SNAPSHOT_LOG_GLEANER_IMPL_HPP_
#define FOEDUS_SNAPSHOT_LOG_GLEANER_IMPL_HPP_
#include <stdint.h>

#include <atomic>
#include <iosfwd>
#include <map>
#include <string>
#include <vector>

#include "foedus/assert_nd.hpp"
#include "foedus/attachable.hpp"
#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/memory/aligned_memory.hpp"
#include "foedus/snapshot/fwd.hpp"
#include "foedus/snapshot/log_gleaner_ref.hpp"
#include "foedus/snapshot/snapshot_manager_pimpl.hpp"
#include "foedus/storage/fwd.hpp"
#include "foedus/storage/storage_id.hpp"
#include "foedus/thread/fwd.hpp"
#include "foedus/thread/rendezvous_impl.hpp"

namespace foedus {
namespace snapshot {
class LogGleaner final : public LogGleanerRef {
 public:
  LogGleaner(Engine* engine, LogGleanerResource* gleaner_resource, const Snapshot& new_snapshot);

  LogGleaner() = delete;
  LogGleaner(const LogGleaner &other) = delete;
  LogGleaner& operator=(const LogGleaner &other) = delete;

  ErrorStack execute();

  std::string             to_string() const;
  friend std::ostream&    operator<<(std::ostream& o, const LogGleaner& v);

  const std::map<storage::StorageId, storage::SnapshotPagePointer>& get_new_root_page_pointers()
    const {
    return new_root_page_pointers_;
  }

 private:
  LogGleanerResource* const       gleaner_resource_;
  const Snapshot                  new_snapshot_;

  std::map<storage::StorageId, storage::SnapshotPagePointer> new_root_page_pointers_;

  void      clear_all();

  ErrorStack design_partitions();
  void design_partitions_run(storage::StorageId from, storage::StorageId count, ErrorStack* result);

  ErrorStack cancel_reducers_mappers();

  ErrorStack construct_root_pages();
};

}  // namespace snapshot
}  // namespace foedus
#endif  // FOEDUS_SNAPSHOT_LOG_GLEANER_IMPL_HPP_