src/backup.cc

   1 ///
   2 /// \file       backup.cc
   3 ///             Special parser class to support creation of Barry Backup files
   4 ///
   5
   6 /*
   7     Copyright (C) 2010, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #include "backup.h"
  23 #include "tarfile.h"
  24 #include "error.h"
  25 #include <sstream>
  26 #include <iomanip>
  27 #include <iostream>
  28
  29 namespace Barry {
  30
  31 Backup::Backup(const std::string &tarpath)
  32 {
  33         try {
  34                 m_tar.reset( new reuse::TarFile(tarpath.c_str(), true,
  35                                 &reuse::gztar_ops_nonthread, true) );
  36         }
  37         catch( reuse::TarFile::TarError &te ) {
  38                 throw Barry::BackupError(te.what());
  39         }
  40 }
  41
  42 Backup::~Backup()
  43 {
  44         try {
  45                 Close();
  46         }
  47         catch( Barry::BackupError & ) {
  48                 // throw it away
  49         }
  50 }
  51
  52 void Backup::Close()
  53 {
  54         if( m_tar.get() ) try {
  55                 m_tar->Close();
  56                 m_tar.reset();
  57         }
  58         catch( reuse::TarFile::TarError &te ) {
  59                 throw Barry::BackupError(te.what());
  60         }
  61 }
  62
  63
  64 //////////////////////////////////////////////////////////////////////////////
  65 // Barry::Parser overrides
  66
  67 void Backup::ParseRecord(const Barry::DBData &data,
  68                           const Barry::IConverter *ic)
  69 {
  70         m_current_dbname = data.GetDBName();
  71
  72         std::ostringstream oss;
  73         oss << std::hex << data.GetUniqueId()
  74                 << " " << (unsigned int)data.GetRecType();
  75         m_tar_id_text = oss.str();
  76
  77         if( m_current_dbname.size() == 0 )
  78                 throw Barry::BackupError("Backup: No database name available");
  79         if( m_tar_id_text.size() == 0 )
  80                 throw Barry::BackupError("Backup: No unique ID available!");
  81
  82         m_record_data.assign(
  83                 (const char*)data.GetData().GetData() + data.GetOffset(),
  84                 data.GetData().GetSize() - data.GetOffset());
  85
  86         // save to tarball
  87         std::string tarname = m_current_dbname + "/" + m_tar_id_text;
  88         m_tar->AppendFile(tarname.c_str(), m_record_data);
  89 }
  90
  91 } // namespace Barry
  92