public OpDataPersister(OplogConfig config)
{
_config = config;
Segments = Directory
.GetFiles(Path.Combine(_config.BasePath, "."), string.Format("{0}*.sf", _config.Name))
.Select(x => ColdSegment.Load(x, _config.Name))
.OrderBy(x => x.Position)
.ToList();
if(!Segments.Any())
RollNewSegment();
else
{
var last = Segments.Last();
var blocks = last.FetchForward().ToList();
Console.WriteLine("Last [{0}] {1}", last.Position, blocks.Count());
last.Dispose();
Segments.Remove(last);
var burner = new HotSegmentBurner(_config, last.Position);
CurrentSegment = new HotSegment(_config.Quota, blocks) { Burner = burner, Position = last.Position };
Segments.Add(CurrentSegment);
}
}
public HotSegmentBurner(OplogConfig cfg, long position)
{
Path = System.IO.Path.Combine(cfg.BasePath, string.Format("{0}{1}.sf", cfg.Name, position.ToString("D12")));
_fsSegment = new FileStream(
Path,
FileMode.OpenOrCreate,
FileAccess.ReadWrite,
FileShare.ReadWrite,
4096,
FileOptions.WriteThrough);
if(cfg.Fixed)
_fsSegment.SetLength(cfg.Quota);
}
public virtual void SetUp()
{
var typeName = GetType().Name.Length > 30 ? GetType().Name.Substring(0, 30) : GetType().Name;
Filename = string.Format("{0}-{1}", typeName, Guid.NewGuid());
Cfg4K = new OplogConfig()
{
Name = Filename,
Quota = 4 * Units.KILO,
Fixed = true,
BasePath = "utt"
};
Cfg4Mb = new OplogConfig()
{
Name = Filename,
Quota = 4 * Units.MEGA,
Fixed = true,
BasePath = "utt"
};
}
public Oplog(OplogConfig config)
{
Advanced = new OpDataPersister(config);
}