public void PushBlock(FileBlock block)
{
lock (_blockQueue)
{
BlocksQueue.Enqueue(block);
Monitor.PulseAll(_blockQueue);
}
}
private void WriteBlock(string file, FileBlock block)
{
using (var outStream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Write))
using (var binaryWriter = new BinaryWriter(outStream))
{
outStream.Position = block.WriteOffset;
outStream.Write(block.Data, 0, block.Data.Length);
}
}
private void WriteBlock(string file, FileBlock block)
{
using (var outStream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Write))
using (var binaryWriter = new BinaryWriter(outStream))
{
outStream.Position = _witeHeaderOffset;
binaryWriter.Write(block.Data.Length);
binaryWriter.Write((int)block.ReadOffset);
_witeHeaderOffset += sizeof(int) * 2;
outStream.Position = _writeDataOffset;
binaryWriter.Write(block.Data);
_writeDataOffset += block.Data.Length;
binaryWriter.Flush();
}
}
private void ReadBlock(string filename, FileBlock block)
{
try
{
using (var fileStream = new FileStream(filename, FileMode.Open, FileAccess.Read))
using (var stream = new MemoryStream())
using (var gzip = new GZipStream(fileStream, CompressionMode.Decompress))
{
fileStream.Position = block.ReadOffset;
gzip.CopyTo(stream);
block.Data = stream.ToArray();
}
}
catch (Exception e)
{
block.HasError = true;
_logger.Error(e, string.Format("An error occurred while preparing block (offset = {0}, size = {1}) of decompressed file", block.ReadOffset, block.Size));
}
}
private void ReadBlock(string path, FileBlock block)
{
try
{
using (var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read))
using (var stream = new MemoryStream())
{
using (var gzip = new GZipStream(stream, CompressionMode.Compress))
{
fileStream.Position = block.ReadOffset;
var buffer = new byte[block.Size];
fileStream.Read(buffer, 0, block.Size);
gzip.Write(buffer, 0, block.Size);
}
block.Data = stream.ToArray();
}
}
catch (Exception e)
{
block.HasError = true;
_logger.Error(e, string.Format("An error occurred while preparing block (offset = {0}, size = {1}) of compressed file", block.ReadOffset, block.Size));
}
}
