/// <summary>
/// write transaction's raw page data into journal
/// </summary>
public void Write(LowLevelTransaction tx, CompressedPagesResult pages, LazyTransactionBuffer lazyTransactionScratch, int uncompressedPageCount)
{
var ptt = new Dictionary <long, PagePosition>(NumericEqualityComparer.Instance);
var pageWritePos = _writePage;
_unusedPagesHashSetPool.Clear();
UpdatePageTranslationTable(tx, _unusedPagesHashSetPool, ptt);
lock (_locker)
{
_writePage += pages.NumberOfPages;
Debug.Assert(!_unusedPages.Any(_unusedPagesHashSetPool.Contains));
_unusedPages.AddRange(_unusedPagesHashSetPool);
}
_unusedPagesHashSetPool.Clear();
var position = pageWritePos * tx.Environment.Options.PageSize;
if (tx.IsLazyTransaction == false && (lazyTransactionScratch == null || lazyTransactionScratch.HasDataInBuffer() == false))
{
try
{
_journalWriter.WritePages(position, pages.Base, pages.NumberOfPages);
}
catch (Exception e)
{
_env.CatastrophicFailure = ExceptionDispatchInfo.Capture(e);
throw;
}
}
else
{
if (lazyTransactionScratch == null)
{
throw new InvalidOperationException("lazyTransactionScratch cannot be null if the transaction is lazy (or a previous one was)");
}
lazyTransactionScratch.EnsureSize(_journalWriter.NumberOfAllocatedPages);
lazyTransactionScratch.AddToBuffer(position, pages, uncompressedPageCount);
// non lazy tx will add itself to the buffer and then flush scratch to journal
if (tx.IsLazyTransaction == false ||
lazyTransactionScratch.NumberOfPages > tx.Environment.ScratchBufferPool.GetAvailablePagesCount() / 2)
{
try
{
lazyTransactionScratch.WriteBufferToFile(this, tx);
}
catch (Exception e)
{
_env.CatastrophicFailure = ExceptionDispatchInfo.Capture(e);
throw;
}
}
else
{
lazyTransactionScratch.EnsureHasExistingReadTransaction(tx);
}
}
lock (_locker)
{
_pageTranslationTable.SetItems(tx, ptt);
}
}
