// parameters:
// strBackupFileName 备份文件名。扩展名应为 .dp2bak
// return:
// -1 出错
// 0 处理被中断
// 1 成功
int BackupDatabase(
RmsChannel channel,
string strRecPathFileName,
BreakPointInfo info,
string strBackupFileName,
out BreakPointInfo breakpoint,
out string strError)
{
strError = "";
breakpoint = new BreakPointInfo();
breakpoint.BackupFileName = strBackupFileName;
this._stop.BeginLoop();
try
{
ExportUtil export_util = new ExportUtil();
export_util.SafeMode = true;
export_util.TempDir = this.App.TempDir;
int nRet = export_util.Begin(null,
strBackupFileName,
out strError);
if (nRet == -1)
{
return(-1);
}
try
{
List <string> lines = new List <string>();
using (StreamReader sr = new StreamReader(strRecPathFileName, Encoding.UTF8))
{
long lTotalLength = sr.BaseStream.Length;
// 跳过断点位置前，以前已经处理过的行
if (info != null &&
string.IsNullOrEmpty(info.DbName) == false &&
string.IsNullOrEmpty(info.RecID) == false)
{
while (true)
{
if (this.Stopped == true)
{
strError = "中断";
WriteStateFile(strBackupFileName, "abort"); // 表示文件创建过程被中断。文件内容不完整
return(0);
}
string line = sr.ReadLine();
if (line == null)
{
break;
}
string strDbName = ResPath.GetDbName(line);
string strID = ResPath.GetRecordId(line);
if (info.DbName == strDbName && info.RecID == strID)
{
break;
}
}
}
this.AppendResultText("开始写入大备份文件" + strBackupFileName + "\r\n");
while (true)
{
if (this.Stopped == true)
{
strError = "中断";
WriteStateFile(strBackupFileName, "abort"); // 表示文件创建过程被中断。文件内容不完整
return(0);
}
string line = sr.ReadLine();
if (line != null)
{
lines.Add(line);
}
if (lines.Count >= BATCH_SIZE ||
(line == null && lines.Count > 0))
{
RmsBrowseLoader loader = new RmsBrowseLoader();
loader.Channel = channel;
loader.Format = "id,xml,timestamp,metadata";
loader.RecPaths = lines;
foreach (Record record in loader)
{
if (this.Stopped == true)
{
strError = "中断";
WriteStateFile(strBackupFileName, "abort"); // 表示文件创建过程被中断。文件内容不完整
return(0);
}
// TODO: 检查 RecordBody 是否为 null
nRet = export_util.ExportOneRecord(
channel,
this._stop,
this.App.WsUrl,
record.Path,
record.RecordBody.Xml,
record.RecordBody.Metadata,
record.RecordBody.Timestamp,
out strError);
if (nRet == -1)
{
WriteStateFile(strBackupFileName, "error"); // 表示文件创建过程出错
return(-1);
}
breakpoint.DbName = ResPath.GetDbName(record.Path);
breakpoint.RecID = ResPath.GetRecordId(record.Path);
long lCurrent = sr.BaseStream.Position;
SetProgressText(m_nRecordCount.ToString() + " " + record.Path + " " + GetPercent((double)lCurrent, lTotalLength));
// 每 100 条显示一行
if ((m_nRecordCount % 100) == 0)
{
this.AppendResultText("已输出记录 " + record.Path + " " + (m_nRecordCount + 1).ToString() + "\r\n");
}
m_nRecordCount++;
}
lines.Clear();
}
if (line == null)
{
break;
}
}
Debug.Assert(lines.Count == 0, "");
breakpoint = null;
}
}
finally
{
export_util.End();
}
WriteStateFile(strBackupFileName, "finish"); // 表示文件已经创建完成
return(1);
}
catch (Exception ex)
{
strError = "BackupDatabase() 出现异常: " + ExceptionUtil.GetDebugText(ex);
WriteStateFile(strBackupFileName, "error"); // 表示文件创建过程出错
return(-1);
}
finally
{
this._stop.EndLoop();
}
}
