public IEnumerable <GlobalSequenceRecord> Read(long lastCommittedGlobalSequenceNumber, long offset)
{
using (var readStream = new FileStream(_seqFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 100 * SizeofSeqRecord, FileOptions.None))
using (var reader = new BinaryReader(readStream, Encoding.ASCII))
{
readStream.Seek(offset * SizeofSeqRecord, SeekOrigin.Begin);
while (readStream.Position + SizeofSeqRecord <= readStream.Length)
{
var record = new GlobalSequenceRecord
{
GlobalSequenceNumber = reader.ReadInt64(),
AggregateRootId = ReadFixedLengthString(reader),
LocalSequenceNumber = reader.ReadInt64(),
};
if (record.GlobalSequenceNumber > lastCommittedGlobalSequenceNumber)
{
break;
}
yield return(record);
}
}
}
public void Write(GlobalSequenceRecord record)
{
_writer.Write(record.GlobalSequenceNumber);
var keyAsBytes = Encoding.UTF8.GetBytes(record.AggregateRootId);
var length = keyAsBytes.Length;
Array.Resize(ref keyAsBytes, 255);
_writer.Write((byte)length);
_writer.Write(keyAsBytes);
_writer.Write(record.LocalSequenceNumber);
_writer.Flush();
}
public IEnumerable<GlobalSequenceRecord> Read(long lastCommittedGlobalSequenceNumber, long offset)
{
using (var readStream = new FileStream(_seqFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 100 * SizeofSeqRecord, FileOptions.None))
using (var reader = new BinaryReader(readStream, Encoding.ASCII))
{
readStream.Seek(offset * SizeofSeqRecord, SeekOrigin.Begin);
while (readStream.Position + SizeofSeqRecord <= readStream.Length)
{
var record = new GlobalSequenceRecord
{
GlobalSequenceNumber = reader.ReadInt64(),
AggregateRootId = ReadFixedLengthString(reader),
LocalSequenceNumber = reader.ReadInt64(),
};
if (record.GlobalSequenceNumber > lastCommittedGlobalSequenceNumber)
break;
yield return record;
}
}
}
