/// <summary>
/// Write pages into disk and confirm transaction in wal-index. Returns true if any dirty page was updated
/// </summary>
public bool Commit()
{
if (_disposed)
{
return(false);
}
LOG($"commit transaction ({_transPages.TransactionSize} pages)", "TRANSACTION");
if (_mode == LockMode.Write || _transPages.HeaderChanged)
{
// persist all dirty page as commit mode (mark last page as IsConfirm)
var count = this.PersistDirtyPages(true);
// update wal-index (if any page was added into log disk)
if (count > 0)
{
_walIndex.ConfirmTransaction(_transactionID, _transPages.DirtyPages.Values);
}
}
// dispose all snapshosts
foreach (var snapshot in _snapshots.Values)
{
snapshot.Dispose();
}
this.Done();
return(true);
}
/// <summary>
/// Write pages into disk and confirm transaction in wal-index. Returns true if any dirty page was updated
/// After commit, all snapshot are closed
/// </summary>
public async Task Commit()
{
ENSURE(_state == TransactionState.Active, $"transaction must be active to commit (current state: {_state})");
LOG($"commit transaction ({_transPages.TransactionSize} pages)", "TRANSACTION");
if (_mode == LockMode.Write || _transPages.HeaderChanged)
{
// persist all dirty page as commit mode (mark last page as IsConfirm)
var count = await this.PersistDirtyPages(true);
// update wal-index (if any page was added into log disk)
if (count > 0)
{
_walIndex.ConfirmTransaction(_transactionID, _transPages.DirtyPages.Values);
}
}
// dispose all snapshosts
foreach (var snapshot in _snapshots.Values)
{
snapshot.Dispose();
}
_state = TransactionState.Committed;
}