internal void RevertWritingTransaction(IRootNode currentArtRoot)
{
lock (_writeLock)
{
currentArtRoot.Dispose();
_writingTransaction = null;
TryDequeWaiterForWritingTransaction();
}
}
void NewWrittingTransactionUnsafe(TaskCompletionSource <IKeyValueDBTransaction> tcs)
{
FreeWaitingToDispose();
var newTransactionRoot = LastCommited;
_lastCommited = newTransactionRoot.Snapshot();
_writingTransaction = new ArtInMemoryKeyValueDBTransaction(this, newTransactionRoot, true, false);
tcs.TrySetResult(_writingTransaction);
}
internal void CommitWrittingTransaction(IRootNode artRoot)
{
lock (_writeLock)
{
_writingTransaction = null;
if (_lastCommited.Dereference())
{
_lastCommited.Dispose();
}
_lastCommited = artRoot;
TryDequeWaiterForWrittingTransaction();
}
}
internal void RevertWrittingTransaction(IRootNode currentArtRoot)
{
lock (_writeLock)
{
currentArtRoot.RevertTo(_lastCommited);
if (_lastCommited.Dereference())
{
_lastCommited.Dispose();
}
_lastCommited = currentArtRoot;
_writingTransaction = null;
TryDequeWaiterForWrittingTransaction();
}
}
ArtInMemoryKeyValueDBTransaction NewWritingTransactionUnsafe()
{
FreeWaitingToDispose();
var newTransactionRoot = _lastCommited.CreateWritableTransaction();
try
{
var tr = new ArtInMemoryKeyValueDBTransaction(this, newTransactionRoot, true, false);
_writingTransaction = tr;
return(tr);
}
catch
{
newTransactionRoot.Dispose();
throw;
}
}
internal IRootNode MakeWritableTransaction(ArtInMemoryKeyValueDBTransaction keyValueDBTransaction,
IRootNode artRoot)
{
lock (_writeLock)
{
if (_writingTransaction != null)
{
throw new BTDBTransactionRetryException("Another writing transaction already running");
}
if (_lastCommited != artRoot)
{
throw new BTDBTransactionRetryException("Another writing transaction already finished");
}
_writingTransaction = keyValueDBTransaction;
var result = _lastCommited.CreateWritableTransaction();
DereferenceRoot(artRoot);
return(result);
}
}
