/// <summary>
/// Compression of a block method that is used as callback for <see cref="CollectionProcessorThreadPool{T}"/>
/// </summary>
/// <param name="block">Processing block</param>
protected override void ProcessBlock(ByteBlock block)
{
if (block == null || IsAborted)
{
return;
}
using (var memoryStream = new MemoryStream())
{
using (var gZipStream = new GZipStream(memoryStream, CompressionMode.Compress))
{
gZipStream.Write(block.Buffer, 0, block.Buffer.Length);
}
var compressedBlock = memoryStream.ToArray().AddByteBlockLengthHeader();
OutputBlocks.Add(block.BlockNumber, compressedBlock);
}
}
/// <summary>
/// Decompression of a block method that is used as callback for <see cref="CollectionProcessorThreadPool{T}"/>
/// </summary>
/// <param name="block">Processing block</param>
protected override void ProcessBlock(ByteBlock block)
{
if (block == null || IsAborted)
{
return;
}
using (var memoryStream = new MemoryStream(block.Buffer))
{
var decompressedBlock = block.IsLast ? new byte[OriginalLastBlockLength] : new byte[OriginalBlockSize];
using (var gZipStream = new GZipStream(memoryStream, CompressionMode.Decompress))
{
gZipStream.Read(decompressedBlock, 0, decompressedBlock.Length);
}
OutputBlocks.Add(block.BlockNumber, decompressedBlock);
}
}
/// <summary>
/// Writes to a destination file
/// </summary>
/// <param name="destinationFileInfo">Destination file</param>
protected override void WriteToDestination(FileInfo destinationFileInfo)
{
using (var fileStream = new FileStream(destinationFileInfo.FullName, FileMode.Create))
{
var nextBlockNumber = 0;
while (!IsAborted)
{
var result = OutputBlocks.TryTakeAndRemove(nextBlockNumber, out var block, true);
if (!result)
{
break;
}
nextBlockNumber++;
fileStream.Write(block, 0, block.Length);
}
}
}
public override int GetHashCode()
{
unchecked
{
return(((Header != null ? Header.GetHashCode() : 0) * 397) ^ (OutputBlocks != null ? OutputBlocks.GetHashCode() : 0));
}
}
