internal void Update(IBuildStuff _builder, ICanBeSharded lastEvent, int index)
{
Index = index;
Timestamp = DateTime.Now;
if (lastEvent != null)
{
LastEventTimestamp = lastEvent.Timestamp;
LastEventValue = lastEvent.Value;
}
}
public async Task AppendValues(ICanBeSharded[] values)
{
foreach (var shard in _sharding.Shard(values))
{
var group = shard.GetValues();
var name = shard.GetName();
var header = ReadHeader(name);
DateTime lastEventTimestamp = header.LastEventTimestamp;
ICanBeSharded lastEvent = null;
using (var stream = Open_Stream_For_Writing(name))
{
var tail = header.Index;
using (var buffer = CreateMemoryStream())
{
using (var writer = new BinaryWriter(buffer, Encoding.Default, true))
foreach (var value in group)
{
_builder.Serialize(value, writer);
if(value.Timestamp > lastEventTimestamp)
{
lastEvent = value;
lastEventTimestamp = value.Timestamp;
}
}
stream.Seek(tail, SeekOrigin.Begin);
buffer.Seek(0, SeekOrigin.Begin);
int writtenBytes = group.Count() * _builder.SingleElementSizeInBytes();
await buffer.CopyToAsync(stream);
stream.Flush();
tail = tail + writtenBytes;
}
header.Update(_builder, lastEvent, tail);
}
await WriteHeader(header, name);
}
}
