private void CreateDB(CreateMode create)
{
if (File.Exists(_dbPath) || File.Exists(_dbPkIdxPath))
{
switch (create)
{
case CreateMode.Create:
throw new Exception("Cannot create DB, DB already exists at " + _path);
case CreateMode.OpenOrCreate:
return;
case CreateMode.Overwrite:
File.Delete(_dbPath);
File.Delete(_dbPkIdxPath);
break;
}
}
if (!Directory.Exists(_path))
{
Directory.CreateDirectory(_path);
}
File.Create(_dbPath, 10000, FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.WriteThrough).Close();
_dbfile = new FileStream(_dbPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 10000, false);
File.Create(_dbPkIdxPath, 10000, FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.WriteThrough).Close();
_dbpkidxfile = new FileStream(_dbPkIdxPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 10000, false);
_identity = new PkIndex <K>();
Close();
}
private void InitDB()
{
_dbfile = new FileStream(_dbPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 10000, false);
_dbpkidxfile = new FileStream(_dbPkIdxPath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, 10000, false);
_identity = ProtoBuf.Serializer.DeserializeWithLengthPrefix <PkIndex <K> >(_dbpkidxfile, _prefix);
foreach (long l in _identity)
{
if (l > _newPos)
{
_newPos = l;
}
if (_newPos != 0)
{
int objLen = 0;
_dbfile.Position = _newPos;
ProtoBuf.Serializer.TryReadLengthPrefix(_dbfile, _prefix, out objLen);
_newPos += objLen;
}
}
}