IndexUpdater.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; either 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_IndexUpdater_h
#define Hypertable_RangeServer_IndexUpdater_h

#include <Hypertable/Lib/ResultCallback.h>
#include <Hypertable/Lib/Schema.h>
#include <Hypertable/Lib/Table.h>
#include <Hypertable/Lib/TableMutatorAsync.h>

#include <Common/String.h>

#include <map>
#include <memory>
#include <mutex>

namespace Hypertable {


  class IndexUpdater {
    friend class IndexUpdaterFactory;

  public:

    IndexUpdater(SchemaPtr &primary_schema, TablePtr index_table, 
                 TablePtr qualifier_index_table);

    ~IndexUpdater() {
      if (m_index_mutator)
        delete m_index_mutator;
      if (m_qualifier_index_mutator)
        delete m_qualifier_index_mutator;
      delete m_cb;
    }

    void purge(const Key &key, const ByteString &value);

    void add(const Key &key, const ByteString &value);

  private:

    TableMutatorAsync *m_index_mutator;

    TableMutatorAsync *m_qualifier_index_mutator;

    ResultCallback *m_cb;
    bool m_index_map[256];
    bool m_qualifier_index_map[256];
  };

  typedef std::shared_ptr<IndexUpdater> IndexUpdaterPtr;

  class IndexUpdaterFactory {
  public:
    static IndexUpdaterPtr create(const String &table_id, SchemaPtr &schema,
            bool has_index, bool has_qualifier_index);

    static void close();

    static void clear_cache();

  private:
    // Loads a table.
    static TablePtr load_table(const String &table_name);

    typedef std::map<String, TablePtr> TableMap;

    static std::mutex ms_mutex;
    static NameIdMapperPtr ms_namemap;
    static TableMap ms_qualifier_index_cache;
    static TableMap ms_index_cache;
  };


}

#endif // Hypertable_RangeServer_IndexUpdater_h