public void Open()
{
if (!Directory.Exists(_folder))
{
Directory.CreateDirectory(_folder);
}
_env = LmdbEnv.CreateDb(_folder, 1 * 1024 * 1024);
using (var tx = _env.Write()) {
var dto = Lmdb.GetBuffer(tx, 0);
if (dto == null)
{
SetNewBuffer(tx, 0);
}
else
{
_buffer = new Buffer(dto, _folder);
_buffer.OpenOrCreate();
}
var meta = Lmdb.GetCellarMeta(tx, 0, Lmdb.NewCellarDto());
_maxKeySize = meta.GetCellarMaxKeySize();
_maxValSize = meta.GetCellarMaxValSize();
tx.Commit();
}
}
// called to flush all in-flight data
public void Checkpoint(string name, long position)
{
_buffer.Flush();
using (var tx = _env.Write()) {
var bufferDto = _buffer.GetState();
//Console.WriteLine("Checkpoint buffer at {0}+{1}", bufferDto.GetBufferStartPos(), bufferDto.GetBufferPos());
Lmdb.SetBuffer(tx, 0, bufferDto);
Lmdb.SetStreamPosition(tx, name, position);
Lmdb.SetCellarMeta(tx, 0, Lmdb.NewCellarDto()
.SetCellarMaxKeySize(_maxKeySize)
.SetCellarMaxValSize(_maxValSize));
tx.Commit();
}
}
