LiveFileTracker.h

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/* -*- c++ -*-
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable 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; version 3 of the
 * License, or any later version.
 *
 * Hypertable 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef Hypertable_RangeServer_LifeFileTracker_h
#define Hypertable_RangeServer_LifeFileTracker_h

#include <Hypertable/Lib/RangeSpec.h>
#include <Hypertable/Lib/Schema.h>
#include <Hypertable/Lib/TableIdentifier.h>

#include <Common/String.h>

#include <mutex>
#include <unordered_map>

namespace Hypertable {

  typedef std::unordered_map<String, uint32_t> FileRefCountMap;

  class LiveFileTracker {
  public:

    LiveFileTracker(const TableIdentifier *identifier, SchemaPtr &schema_ptr,
                    const RangeSpec *range, const String &ag_name);

    void change_range(const String &start_row, const String &end_row) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_start_row = start_row;
      m_end_row = end_row;
    }

    void update_live(const String &add, std::vector<String> &deletes, uint32_t nextcsid, int64_t total_blocks);

    void add_live_noupdate(const String &fname, int64_t total_blocks) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_live.insert(strip_basename(fname));
      m_total_blocks = total_blocks;
    }

    void add_references(const std::vector<String> &filev);

    void remove_references(const std::vector<String> &filev);


    void update_files_column();

    void get_file_data(String &file_list, int64_t *block_countp, bool include_blocked);

    void get_file_list(String &file_list);

    void set_next_csid(uint32_t nid) { 
      m_last_nextcsid = m_cur_nextcsid = nid;
    }

  private:

    String strip_basename(const String &fname);

    std::mutex m_mutex;
    std::mutex m_update_mutex;
    TableIdentifierManaged m_identifier;
    String           m_file_basename;
    SchemaPtr        m_schema_ptr;
    String           m_start_row;
    String           m_end_row;
    String           m_ag_name;
    FileRefCountMap  m_referenced;
    std::set<String> m_live;
    std::set<String> m_blocked;
    bool             m_need_update;
    bool             m_is_root;
    uint32_t         m_last_nextcsid;
    uint32_t         m_cur_nextcsid;
    int64_t          m_total_blocks;
  };

}

#endif // Hypertable_RangeServer_LifeFileTracker_h