GroupCommit.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_GroupCommit_h
#define Hypertable_RangeServer_GroupCommit_h

#include "GroupCommitInterface.h"
#include "RangeServer.h"

#include <Common/FlyweightString.h>

#include <map>
#include <mutex>

namespace Hypertable {


  typedef std::pair<uint64_t, TableIdentifier> ClusterTableIdPair;

  struct lt_ctip {
    bool operator()(const ClusterTableIdPair &key1, const ClusterTableIdPair &key2) const {
      if (key1.first != key2.first)
        return false;
      if (key1.second.id == 0 || key2.second.id == 0) {
        if (key1.second.id == 0)
          return true;
        return false;
      }
      int cmpval = strcmp(key1.second.id, key2.second.id);
      if (cmpval != 0)
        return cmpval < 0;
      return key1.second.generation < key2.second.generation;
    }
  };

  class GroupCommit : public GroupCommitInterface {

  public:

    GroupCommit(Apps::RangeServer *range_server);
    virtual void add(EventPtr &event, uint64_t cluster_id, SchemaPtr &schema,
                     const TableIdentifier &table, uint32_t count,
                     StaticBuffer &buffer, uint32_t flags);
    virtual void trigger();

  private:
    std::mutex m_mutex;
    Apps::RangeServer  *m_range_server;
    uint32_t m_commit_interval {};
    int m_counter {};
    FlyweightString m_flyweight_strings;

    std::map<ClusterTableIdPair, UpdateRecTable *, lt_ctip> m_table_map;
  };
}

#endif // Hypertable_RangeServer_GroupCommit_h