public Transaction(StorageEnvironment env, long id, TransactionFlags flags, IFreeSpaceHandling freeSpaceHandling)
{
_dataPager = env.Options.DataPager;
_env = env;
_journal = env.Journal;
_id = id;
_freeSpaceHandling = freeSpaceHandling;
Flags = flags;
var scratchPagerState = env.ScratchBufferPool.PagerState;
scratchPagerState.AddRef();
_pagerStates.Add(scratchPagerState);
if (flags.HasFlag(TransactionFlags.ReadWrite) == false)
{
// for read transactions, we need to keep the pager state frozen
// for write transactions, we can use the current one (which == null)
_scratchPagerState = scratchPagerState;
_state = env.State.Clone(this);
_journal.GetSnapshots().ForEach(AddJournalSnapshot);
return;
}
_state = env.State.Clone(this);
InitTransactionHeader();
MarkTreesForWriteTransaction();
}
public StorageEnvironment(StorageEnvironmentOptions options)
{
try
{
_options = options;
_dataPager = options.DataPager;
_freeSpaceHandling = new FreeSpaceHandling();
_headerAccessor = new HeaderAccessor(this);
var isNew = _headerAccessor.Initialize();
_scratchBufferPool = new ScratchBufferPool(this);
_journal = new WriteAheadJournal(this);
if (isNew)
CreateNewDatabase();
else // existing db, let us load it
LoadExistingDatabase();
State.FreeSpaceRoot.Name = Constants.FreeSpaceTreeName;
State.Root.Name = Constants.RootTreeName;
Writer = new TransactionMergingWriter(this, _cancellationTokenSource.Token);
if (_options.ManualFlushing == false)
_flushingTask = FlushWritesToDataFileAsync();
}
catch (Exception)
{
Dispose();
throw;
}
}
public JournalApplicator(WriteAheadJournal waj)
{
_waj = waj;
}
public JournalApplicator(WriteAheadJournal waj)
{
_waj = waj;
}
public JournalApplicator(WriteAheadJournal waj, ReaderWriterLockSlim flushingSemaphore)
{
_waj = waj;
_flushingSemaphore = flushingSemaphore;
}
public JournalApplicator(WriteAheadJournal waj, ReaderWriterLockSlim flushingSemaphore = null)
{
_waj = waj;
_flushingSemaphore = flushingSemaphore ?? new ReaderWriterLockSlim();
}
public JournalShipper(WriteAheadJournal waj, ReaderWriterLockSlim shippingSemaphore = null)
{
_waj = waj;
_shippingSemaphore = shippingSemaphore ?? new ReaderWriterLockSlim();
}
public JournalApplicator(WriteAheadJournal waj, ReaderWriterLockSlim flushingSemaphore)
{
_waj = waj;
_flushingSemaphore = flushingSemaphore;
}
