Drizzled Public API Documentation

transaction_file_reader.h
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00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2010 David Shrewsbury <shrewsbury.dave@gmail.com>
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00026 #pragma once
00027 
00028 #include <string>
00029 #include <google/protobuf/io/zero_copy_stream_impl.h>
00030 #include <drizzled/message/transaction.pb.h>
00031 
00032 class TransactionFileReader
00033 {
00034 public:
00035   TransactionFileReader();
00036   ~TransactionFileReader();
00037 
00047   bool openFile(const std::string &filename, int start_pos = 0);
00048 
00060   bool getNextTransaction(drizzled::message::Transaction &transaction,
00061                           uint32_t *checksum);
00062 
00066   uint32_t checksumLastReadTransaction();
00067 
00071   std::string getErrorString()
00072   {
00073     return error;
00074   }
00075 
00076 private:
00077   int file;
00078   char *buffer;
00079   char *temp_buffer;
00080   uint32_t previous_length;
00081   std::string error;
00082   google::protobuf::io::ZeroCopyInputStream *raw_input;
00083 };
00084