void StartNewValueFile()
{
lock (_startNewValueFileLocker)
{
QuickFinishCompaction();
var fileInfo = new FilePureValues(AllocNewFileGeneration());
if (_cacheValueWriter != null)
{
lock (_cacheValueWriter)
{
_cacheValueFile !.HardFlush();
SetNewValueFile();
}
}
else
{
SetNewValueFile();
}
fileInfo.WriteHeader(_cacheValueWriter !);
_fileInfos.TryAdd(_cacheValueFileId, fileInfo);
_compactionCts = new CancellationTokenSource();
_compactionTask = Task.Factory.StartNew(CompactionCore, _compactionCts.Token,
TaskCreationOptions.LongRunning, TaskScheduler.Default);
}
}
void LoadContent()
{
AbstractBufferedReader reader;
foreach (var collectionFile in _fileCollection.Enumerate())
{
reader = collectionFile.GetExclusiveReader();
if (!reader.CheckMagic(MagicStartOfFile))
{
continue; // Don't touch files alien files
}
var fileType = (DiskChunkFileType)reader.ReadUInt8();
IFileInfo fileInfo;
switch (fileType)
{
case DiskChunkFileType.HashIndex:
fileInfo = new FileHashIndex(reader);
break;
case DiskChunkFileType.PureValues:
fileInfo = new FilePureValues(reader);
break;
default:
fileInfo = UnknownFile.Instance;
break;
}
if (_fileGeneration < fileInfo.Generation)
{
_fileGeneration = fileInfo.Generation;
}
_fileInfos.TryAdd(collectionFile.Index, fileInfo);
}
var hashFilePair =
_fileInfos.Where(f => f.Value.FileType == DiskChunkFileType.HashIndex).OrderByDescending(
f => f.Value.Generation).FirstOrDefault();
if (hashFilePair.Value == null)
{
return;
}
reader = _fileCollection.GetFile(hashFilePair.Key).GetExclusiveReader();
FileHashIndex.SkipHeader(reader);
if (((FileHashIndex)hashFilePair.Value).KeySize != _keySize)
{
return;
}
var keyBuf = ByteBuffer.NewSync(new byte[_keySize]);
while (true)
{
var cacheValue = new CacheValue();
cacheValue.FileOfs = reader.ReadVUInt32();
if (cacheValue.FileOfs == 0)
{
break;
}
cacheValue.FileId = reader.ReadVUInt32();
cacheValue.AccessRate = reader.ReadVUInt32();
cacheValue.ContentLength = reader.ReadVUInt32();
reader.ReadBlock(keyBuf);
_cache.TryAdd(new ByteStructs.Key20(keyBuf), cacheValue);
}
}
