Task IPageCache.CommitTransaction(ITransaction transaction)
{
using (var transactionHead = CleanupTransaction(transaction))
{
if (transactionHead == null || transactionHead.Updates == null || transactionHead.Updates.Count == 0)
{
return(null);
}
var versionHead = _versions.Add(transaction.CommitVersionNumber);
IPage newPage = null;
foreach (var update in transactionHead.Updates.OrderBy(u => u.PageNumber).ThenBy(u => u.SequenceNumber))
{
if (newPage == null || update.PageNumber != newPage.PageNumber)
{
var pageHead = _pages.GetPageHead(update.PageNumber, CacheHints.ForUpdate);
var newestVersion = pageHead.GetVersion(null);
newPage = _pagePool.Get(update.PageNumber);
newestVersion.Data.CopyTo(newPage.Data, 0);
versionHead.AddPage(new PageVersion(versionHead.VersionNumber, newPage));
}
update.Data.CopyTo(newPage.Data, update.Offset);
}
versionHead.AddToPages(_pages);
return(_fileSet.WriteAndCommit(transaction, transactionHead.Updates));
}
}
