public RecordWriteResult TryAppend(LogRecord record)
{
if (_isReadonly)
{
throw new InvalidOperationException("Cannot write to a read-only block.");
}
var workItem = _writerWorkItem;
var buffer = workItem.Buffer;
var bufferWriter = workItem.BufferWriter;
var stream = workItem.Stream;
buffer.SetLength(4);
buffer.Position = 4;
record.WriteTo(bufferWriter);
var length = (int)buffer.Length - 4;
bufferWriter.Write(length); // length suffix
buffer.Position = 0;
bufferWriter.Write(length); // length prefix
if (stream.Position + length + 8 > ChunkHeader.Size + _chunkHeader.ChunkSize)
{
return(RecordWriteResult.Failed(GetLogicalPosition(workItem)));
}
var oldPosition = WriteRawData(buffer);
_actualDataSize = GetLogicalPosition(workItem);
return(RecordWriteResult.Successful(oldPosition, _actualDataSize));
}
public RecordWriteResult TryAppend(LogRecord record)
{
if (_isReadonly)
{
throw new InvalidOperationException("Cannot write to a read-only block.");
}
var workItem = _writerWorkItem;
var buffer = workItem.Buffer;
var bufferWriter = workItem.BufferWriter;
var stream = workItem.Stream;
buffer.SetLength(4);
buffer.Position = 4;
record.WriteTo(bufferWriter);
buffer.Position = 0;
var toWriteLength = (int)buffer.Length;
bufferWriter.Write(toWriteLength - 4);
if (!VerifyStreamLength(stream, toWriteLength))
{
return(RecordWriteResult.Failed(GetLogicalPosition(workItem)));
}
var oldPosition = WriteRawData(buffer);
_actualDataSize = GetLogicalPosition(workItem);
return(RecordWriteResult.Successful(oldPosition, _actualDataSize));
}
public RecordWriteResult TryAppend(LogRecord record)
{
if (_isReadOnly)
{
throw new InvalidOperationException("Cannot write to a read-only block.");
}
var workItem = _writerWorkItem;
var buffer = workItem.Buffer;
var bufferWriter = workItem.BufferWriter;
var stream = workItem.Stream;
buffer.SetLength(4);
buffer.Position = 4;
record.WriteTo(bufferWriter);
var length = (int)buffer.Length - 4;
bufferWriter.Write(length); // length suffix
buffer.Position = 0;
bufferWriter.Write(length); // length prefix
if (stream.Position + length + 2 * sizeof(int) > ChunkHeader.Size + _chunkHeader.ChunkSize)
{
return(RecordWriteResult.Failed(GetDataPosition(workItem)));
}
var oldPosition = WriteRawData(workItem, buffer);
_physicalDataSize = (int)GetDataPosition(workItem); // should fit 32 bits
_logicalDataSize = ChunkHeader.GetLocalLogPosition(record.LogPosition + length + 2 * sizeof(int));
// for non-scavenged chunk _physicalDataSize should be the same as _logicalDataSize
// for scavenged chunk _logicalDataSize should be at least the same as _physicalDataSize
if ((!ChunkHeader.IsScavenged && _logicalDataSize != _physicalDataSize) ||
(ChunkHeader.IsScavenged && _logicalDataSize < _physicalDataSize))
{
throw new Exception(string.Format("Data sizes violation. Chunk: {0}, IsScavenged: {1}, LogicalDataSize: {2}, PhysicalDataSize: {3}.",
FileName, ChunkHeader.IsScavenged, _logicalDataSize, _physicalDataSize));
}
return(RecordWriteResult.Successful(oldPosition, _physicalDataSize));
}