public WriteSession(string directory, Compression compression)
{
var version = LockUtil.GetNextChronologicalFileId();
_version = CreateNewSegmentInfo(version);
_version.Compression = compression;
Log.InfoFormat("begin writing {0}", _version.Version);
var docFileName = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName() + ".dtbl");
var docAddressFn = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName() + ".da");
var docHashesFileName = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName() + ".pk");
_directory = directory;
_keyIndexFileName = Path.Combine(Directory.GetCurrentDirectory(), Path.GetRandomFileName() + ".kix");
_addressWriter = new BlockInfoWriter(
new FileStream(docAddressFn, FileMode.CreateNew, FileAccess.ReadWrite,
FileShare.None, 4096, FileOptions.DeleteOnClose));
_docWriter = new DocumentWriter(
new FileStream(docFileName, FileMode.CreateNew, FileAccess.ReadWrite,
FileShare.None, 4096, FileOptions.DeleteOnClose), compression);
_docHashesStream = new FileStream(
docHashesFileName, FileMode.CreateNew, FileAccess.ReadWrite,
FileShare.None, 4096, FileOptions.DeleteOnClose);
_keyIndex = new Dictionary <string, short>();
_fieldNames = new List <string>();
}
protected Stream OpenDataFileStream(out FileStream lockFile)
{
Stream dataFile;
if (!LockUtil.TryAquireWriteLock(_directory, out lockFile))
{
var dataFileName = Path.Combine(_directory, _version + ".rdb");
dataFile = new FileStream(
dataFileName,
FileMode.CreateNew,
FileAccess.Write,
FileShare.ReadWrite,
4096
);
}
else
{
var ixFileName = LockUtil.GetFirstIndexFileNameInChronologicalOrder(_directory);
long dataFileVersion = ixFileName == null ?
_version.Version :
long.Parse(Path.GetFileNameWithoutExtension(ixFileName));
var dataFileName = Path.Combine(_directory, dataFileVersion + ".rdb");
dataFile = new FileStream(
dataFileName,
FileMode.Append,
FileAccess.Write,
FileShare.ReadWrite,
4096
);
}
return(dataFile);
}