text: /** @file chert_databasereplicator.h
   * @brief Support for chert database replication
   */
  /* Copyright 2008 Lemur Consulting Ltd
   * Copyright 2010 Richard Boulton
   * Copyright 2010 Olly Betts
   *
   * This program 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 2 of the
   * License, or (at your option) any later version.
   *
   * This program 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 St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  
  #ifndef XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H
  #define XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H
  
  #include "databasereplicator.h"
  
  class ChertDatabaseReplicator : public Xapian::DatabaseReplicator {
      private:
  	/** Path of database.
  	 */
  	std::string db_dir;
  
  	/** The maximum number of changesets which should be kept in the
  	 *  database. */
  	unsigned int max_changesets;
  
  	/** Process a chunk which holds a base block.
  	 */
  	void process_changeset_chunk_base(const std::string & tablename,
  					  std::string & buf,
  					  RemoteConnection & conn,
  					  double end_time,
  					  int changes_fd) const;
  
  	/** Process a chunk which holds a list of changed blocks in the
  	 *  database.
  	 */
  	void process_changeset_chunk_blocks(const std::string & tablename,
  					    std::string & buf,
  					    RemoteConnection & conn,
  					    double end_time,
  					    int changes_fd) const;
  
      public:
  	ChertDatabaseReplicator(const std::string & db_dir_);
  
  	/** Virtual methods of DatabaseReplicator. */
  	//@{
  	bool check_revision_at_least(const std::string & rev,
  				     const std::string & target) const;
  	std::string apply_changeset_from_conn(RemoteConnection & conn,
  					      double end_time,
  					      bool valid) const;
  	std::string get_uuid() const;
  	//@}
  };
  
  #endif /* XAPIAN_INCLUDED_CHERT_DATABASEREPLICATOR_H */
  