void StartNewPureValueFile()
{
_pureValueFile = _fileCollection.AddFile("hpv");
_pureValueFileWriter = _pureValueFile.GetAppenderWriter();
var fileInfo = new FilePureValuesWithId(_subDBId, _fileCollection.NextGeneration(), _fileCollection.Guid);
fileInfo.WriteHeader(_pureValueFileWriter);
_pureValueFile.Flush();
_fileCollection.SetInfo(_pureValueFile.Index, fileInfo);
}
StorageValue StoreContent(ByteBuffer content)
{
var result = new StorageValue();
result.Compressed = false;
result.ContentLength = (uint)content.Length;
if (_pureValueFile == null)
{
StartNewPureValueFile();
}
result.FileId = _pureValueFile.Index;
result.FileOfs = (uint)_pureValueFileWriter.GetCurrentPosition();
_pureValueFileWriter.WriteBlock(content);
_pureValueFile.Flush();
if (_pureValueFileWriter.GetCurrentPosition() >= _maxFileSize)
{
_pureValueFile.HardFlushTruncateSwitchToReadOnlyMode();
StartNewPureValueFile();
}
return(result);
}
public void Put(ByteBuffer key, ByteBuffer content)
{
if (key.Length != _keySize)
{
throw new ArgumentException("Key has wrong Length not equal to KeySize");
}
if (content.Length == 0)
{
throw new ArgumentException("Empty Content cannot be stored");
}
var k = new ByteStructs.Key20(key);
CacheValue cacheValue;
if (_cache.TryGetValue(k, out cacheValue))
{
return;
}
cacheValue.AccessRate = 1;
again:
var writer = _cacheValueWriter;
while (writer == null || writer.GetCurrentPosition() + content.Length > _sizeLimitOfOneValueFile)
{
StartNewValueFile();
writer = _cacheValueWriter;
}
lock (writer)
{
if (writer != _cacheValueWriter)
{
goto again;
}
cacheValue.FileId = _cacheValueFileId;
cacheValue.FileOfs = (uint)_cacheValueWriter.GetCurrentPosition();
_cacheValueWriter.WriteBlock(content);
_cacheValueFile.Flush();
}
cacheValue.ContentLength = (uint)content.Length;
_cache.TryAdd(k, cacheValue);
}