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 void AppendBeforeReachingMaxCapacityTest()
{
var activeSegment = new HotSegment(45 * Units.MEGA)
{
Burner = new HotSegmentBurner(QuotedAs(45 * Units.MEGA), 0),
};
for (var i = 0; i < 10 * 100; i++)
{
var next = Guid.NewGuid().ToByteArray();
activeSegment.Append(next);
}
Assert.That(activeSegment.Blocks.Count, Is.EqualTo(11)); // blocks
Assert.That((10752 * 4 * Units.KILO) / Units.MEGA, Is.EqualTo(42)); // mb
}
public void AppendStopsAtMaxCapacityTest()
{
var activeSegment = new HotSegment(10 * Units.KILO)
{
Burner = new HotSegmentBurner(QuotedAs(10 * Units.KILO), 0),
}; ;
try
{
for (var i = 0; i < 10 * 100; i++)
{
var next = Guid.NewGuid().ToByteArray();
activeSegment.Append(next);
}
}
catch (HotSegmentFullException)
{
}
Assert.That(activeSegment.Blocks.Count, Is.EqualTo(2));
Assert.That(activeSegment.Blocks.Select(x => x.Payload.Length).Sum() / Units.KILO, Is.EqualTo(8));
}
private void RollNewSegment()
{
if (CurrentSegment != null)
CurrentSegment.Burner.Dispose();
var position = Segments.Count * _config.Quota;
CurrentSegment = new HotSegment(_config.Quota)
{
Burner = new HotSegmentBurner(_config, position),
Position = position
};
Segments.Add(CurrentSegment);
}
