LoadMetricsRange.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.
 *
 * 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_LoadMetricsRange_h
#define Hypertable_RangeServer_LoadMetricsRange_h

#include "LoadFactors.h"

#include <Hypertable/Lib/TableMutator.h>

#include <Common/DynamicBuffer.h>
#include <Common/String.h>

#include <mutex>

namespace Hypertable {

  class LoadMetricsRange {
  public:
    LoadMetricsRange(const String &table_id, const String &start_row, const String &end_row);

    void change_rows(const String &start_row, const String &end_row) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_new_start_row = start_row;
      m_new_end_row = end_row;
      m_new_rows = true;
    }

    void compute_and_store(TableMutator *mutator, time_t now,
                           LoadFactors &load_factors,
                           uint64_t disk_used, uint64_t memory_used,
                           double compression_ratio);

  private:

    void initialize(const String &table_id, const String &start_row, const String &end_row);

    std::mutex m_mutex;
    DynamicBuffer m_buffer;
    const char *m_table_id;
    const char *m_start_row;
    const char *m_end_row;
    String m_new_start_row;
    String m_new_end_row;
    bool m_new_rows;
    time_t m_timestamp;
    LoadFactors m_load_factors;
  };
}


#endif // Hypertable_RangeServer_LoadMetricsRange_h