public int StartDefragmentation()
{
int defragmentationTime = 0;
if (_fileToBeDefragmented == 0)
{
if (_metadataPersister.DefragmentationNeeded())
{
defragmentationTime = _metadataPersister.StartDefragmentation();
}
}
else
{
string dbId = GetFullDbId(_fileToBeDefragmented);
FileMetadata <long, byte[]> fileMetadata = _fileMetadataDictionary[dbId];
if (fileMetadata == null)
{
throw new Exception("unable to find database file.");
}
if (fileMetadata.Provider.DefragmentationNeeded())
{
defragmentationTime = fileMetadata.Provider.StartDefragmentation();
}
}
_fileToBeDefragmented++;
if (_fileToBeDefragmented > _fileMetadataDictionary.Count)
{
_fileToBeDefragmented = 0;
}
return(defragmentationTime);
}
