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       1                 :            : /** @file chert_databasereplicator.h
       2                 :            :  * @brief Support for chert database replication
       3                 :            :  */
       4                 :            : /* Copyright 2008 Lemur Consulting Ltd
       5                 :            :  * Copyright 2010 Richard Boulton
       6                 :            :  * Copyright 2010 Olly Betts
       7                 :            :  *
       8                 :            :  * This program is free software; you can redistribute it and/or
       9                 :            :  * modify it under the terms of the GNU General Public License as
      10                 :            :  * published by the Free Software Foundation; either version 2 of the
      11                 :            :  * License, or (at your option) any later version.
      12                 :            :  *
      13                 :            :  * This program is distributed in the hope that it will be useful,
      14                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16                 :            :  * GNU General Public License for more details.
      17                 :            :  *
      18                 :            :  * You should have received a copy of the GNU General Public License
      19                 :            :  * along with this program; if not, write to the Free Software
      20                 :            :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
      21                 :            :  * USA
      22                 :            :  */
      23                 :            : 
      24                 :            : #ifndef XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H
      25                 :            : #define XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H
      26                 :            : 
      27                 :            : #include "databasereplicator.h"
      28                 :            : 
      29 [ +  - ][ #  # ]:         66 : class ChertDatabaseReplicator : public Xapian::DatabaseReplicator {
      30                 :            :     private:
      31                 :            :         /** Path of database.
      32                 :            :          */
      33                 :            :         std::string db_dir;
      34                 :            : 
      35                 :            :         /** The maximum number of changesets which should be kept in the
      36                 :            :          *  database. */
      37                 :            :         unsigned int max_changesets;
      38                 :            : 
      39                 :            :         /** Process a chunk which holds a base block.
      40                 :            :          */
      41                 :            :         void process_changeset_chunk_base(const std::string & tablename,
      42                 :            :                                           std::string & buf,
      43                 :            :                                           RemoteConnection & conn,
      44                 :            :                                           double end_time,
      45                 :            :                                           int changes_fd) const;
      46                 :            : 
      47                 :            :         /** Process a chunk which holds a list of changed blocks in the
      48                 :            :          *  database.
      49                 :            :          */
      50                 :            :         void process_changeset_chunk_blocks(const std::string & tablename,
      51                 :            :                                             std::string & buf,
      52                 :            :                                             RemoteConnection & conn,
      53                 :            :                                             double end_time,
      54                 :            :                                             int changes_fd) const;
      55                 :            : 
      56                 :            :     public:
      57                 :            :         ChertDatabaseReplicator(const std::string & db_dir_);
      58                 :            : 
      59                 :            :         /** Virtual methods of DatabaseReplicator. */
      60                 :            :         //@{
      61                 :            :         bool check_revision_at_least(const std::string & rev,
      62                 :            :                                      const std::string & target) const;
      63                 :            :         std::string apply_changeset_from_conn(RemoteConnection & conn,
      64                 :            :                                               double end_time,
      65                 :            :                                               bool valid) const;
      66                 :            :         std::string get_uuid() const;
      67                 :            :         //@}
      68                 :            : };
      69                 :            : 
      70                 :            : #endif /* XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H */