private void NewHead()
{
_log.DebugFormat("switching to new active file at size {0}", _head.Size);
_files[_head.FileId] = FirkinFile.OpenArchiveFromActive(_head);
var fileId = (ushort)(_head.FileId + 1);
_head = FirkinFile.CreateActive(GetDataFilename(fileId), fileId);
_files[_head.FileId] = _head;
}
public void Truncate()
{
// Note: Have to acquire merge then index syncroots otherwise we're liable to run into a deadlock
lock (_mergeSyncRoot) {
lock (_indexSyncRoot) {
foreach (var file in _files.Values)
{
var filename = file.Filename;
file.Dispose();
File.Delete(filename);
}
_files.Clear();
_index.Clear();
_head = FirkinFile.CreateActive(GetDataFilename(1), 1);
_files[_head.FileId] = _head;
}
}
}
public static IFirkinArchiveFile OpenArchiveFromActive(IFirkinActiveFile file)
{
file.Dispose();
return new FirkinFile(file.Filename, file.FileId, false, 0);
}
public static IFirkinArchiveFile OpenArchiveFromActive(IFirkinActiveFile file)
{
file.Dispose();
return(new FirkinFile(file.Filename, file.FileId, false, 0));
}
private void Initialize()
{
if (!Directory.Exists(_storeDirectory))
{
Directory.CreateDirectory(_storeDirectory);
}
// get all data files
var files = from filename in Directory.GetFiles(_storeDirectory, STORAGE_FILE_PREFIX + "*" + DATA_FILE_EXTENSION)
let fileId = ParseFileId(filename)
orderby fileId
select new { FileId = fileId, Filename = filename };
uint maxSerial = 0;
IFirkinArchiveFile last = null;
foreach (var fileInfo in files)
{
maxSerial = 0;
var file = FirkinFile.OpenArchive(fileInfo.Filename, fileInfo.FileId);
_files.Add(file.FileId, file);
// iterate over key info
var hintFilename = GetHintFilename(fileInfo.FileId);
var count = 0;
var delete = 0;
if (File.Exists(hintFilename))
{
var hintFile = new FirkinHintFile(hintFilename);
foreach (var hint in hintFile)
{
var keyInfo = new KeyInfo(fileInfo.FileId, hint);
var key = _serializer.Deserialize(hint.Key);
_index[key] = keyInfo;
count++;
}
hintFile.Dispose();
_log.DebugFormat("read {0} record markers from hint file {1}", count, fileInfo.FileId);
}
else
{
foreach (var pair in file)
{
var key = _serializer.Deserialize(pair.Key);
maxSerial = pair.Value.Serial;
if (pair.Value.ValueSize == 0)
{
_index.Remove(key);
delete++;
}
else
{
_index[key] = pair.Value;
count++;
}
}
_log.DebugFormat("read {0} record and {1} delete markers from data file {2}", count, delete, fileInfo.FileId);
}
last = file;
}
if (last != null && last.Size < _maxFileSize)
{
_head = FirkinFile.OpenActiveFromArchive(last, maxSerial);
}
else
{
ushort fileId = 1;
if (last != null)
{
fileId += last.FileId;
}
_head = FirkinFile.CreateActive(GetDataFilename(fileId), fileId);
}
_files[_head.FileId] = _head;
}