public static void TransactionCommit()
{
var itself = _constants.Itself;
var tempDatabaseFilename = Path.GetTempFileName();
var tempTransactionLogFilename = Path.GetTempFileName();
// Commit
using (var memoryAdapter = new UInt64LinksTransactionsLayer(new UInt64UnitedMemoryLinks(tempDatabaseFilename), tempTransactionLogFilename))
using (var links = new UInt64Links(memoryAdapter))
{
using (var transaction = memoryAdapter.BeginTransaction())
{
var l1 = links.CreateAndUpdate(itself, itself);
var l2 = links.CreateAndUpdate(itself, itself);
Global.Trash = links.Update(l2, l2, l1, l2);
links.Delete(l1);
transaction.Commit();
}
Global.Trash = links.Count();
}
Global.Trash = FileHelpers.ReadAll <UInt64LinksTransactionsLayer.Transition>(tempTransactionLogFilename);
}
public static void Bug1Test()
{
var tempDatabaseFilename = Path.GetTempFileName();
var tempTransactionLogFilename = Path.GetTempFileName();
var itself = _constants.Itself;
// User Code Error (Autoreverted), some data saved
try
{
ulong l1;
ulong l2;
using (var memory = new UInt64UnitedMemoryLinks(tempDatabaseFilename))
using (var memoryAdapter = new UInt64LinksTransactionsLayer(memory, tempTransactionLogFilename))
using (var links = new UInt64Links(memoryAdapter))
{
l1 = links.CreateAndUpdate(itself, itself);
l2 = links.CreateAndUpdate(itself, itself);
l2 = links.Update(l2, l2, l1, l2);
links.CreateAndUpdate(l2, itself);
links.CreateAndUpdate(l2, itself);
}
Global.Trash = FileHelpers.ReadAll <UInt64LinksTransactionsLayer.Transition>(tempTransactionLogFilename);
using (var memory = new UInt64UnitedMemoryLinks(tempDatabaseFilename))
using (var memoryAdapter = new UInt64LinksTransactionsLayer(memory, tempTransactionLogFilename))
using (var links = new UInt64Links(memoryAdapter))
{
using (var transaction = memoryAdapter.BeginTransaction())
{
l2 = links.Update(l2, l1);
links.Delete(l2);
ExceptionThrower();
transaction.Commit();
}
Global.Trash = links.Count();
}
}
catch
{
Global.Trash = FileHelpers.ReadAll <UInt64LinksTransactionsLayer.Transition>(tempTransactionLogFilename);
}
File.Delete(tempDatabaseFilename);
File.Delete(tempTransactionLogFilename);
}
public static void TransactionDamage()
{
var itself = _constants.Itself;
var tempDatabaseFilename = Path.GetTempFileName();
var tempTransactionLogFilename = Path.GetTempFileName();
// Commit
using (var memoryAdapter = new UInt64LinksTransactionsLayer(new UInt64UnitedMemoryLinks(tempDatabaseFilename), tempTransactionLogFilename))
using (var links = new UInt64Links(memoryAdapter))
{
using (var transaction = memoryAdapter.BeginTransaction())
{
var l1 = links.CreateAndUpdate(itself, itself);
var l2 = links.CreateAndUpdate(itself, itself);
Global.Trash = links.Update(l2, l2, l1, l2);
links.Delete(l1);
transaction.Commit();
}
Global.Trash = links.Count();
}
Global.Trash = FileHelpers.ReadAll <UInt64LinksTransactionsLayer.Transition>(tempTransactionLogFilename);
// Damage database
FileHelpers.WriteFirst(tempTransactionLogFilename, new UInt64LinksTransactionsLayer.Transition(new UniqueTimestampFactory(), 555));
// Try load damaged database
try
{
// TODO: Fix
using (var memoryAdapter = new UInt64LinksTransactionsLayer(new UInt64UnitedMemoryLinks(tempDatabaseFilename), tempTransactionLogFilename))
using (var links = new UInt64Links(memoryAdapter))
{
Global.Trash = links.Count();
}
}
catch (NotSupportedException ex)
{
Assert.True(ex.Message == "Database is damaged, autorecovery is not supported yet.");
}
Global.Trash = FileHelpers.ReadAll <UInt64LinksTransactionsLayer.Transition>(tempTransactionLogFilename);
File.Delete(tempDatabaseFilename);
File.Delete(tempTransactionLogFilename);
}
public static void SavedSequencesOptimizationTest()
{
LinksConstants <ulong> constants = new LinksConstants <ulong>((1, long.MaxValue), (long.MaxValue + 1UL, ulong.MaxValue));
using (var memory = new HeapResizableDirectMemory())
using (var disposableLinks = new UInt64UnitedMemoryLinks(memory, UInt64UnitedMemoryLinks.DefaultLinksSizeStep, constants, IndexTreeType.Default))
{
var links = new UInt64Links(disposableLinks);
var root = links.CreatePoint();
//var numberToAddressConverter = new RawNumberToAddressConverter<ulong>();
var addressToNumberConverter = new AddressToRawNumberConverter <ulong>();
var unicodeSymbolMarker = links.GetOrCreate(root, addressToNumberConverter.Convert(1));
var unicodeSequenceMarker = links.GetOrCreate(root, addressToNumberConverter.Convert(2));
var totalSequenceSymbolFrequencyCounter = new TotalSequenceSymbolFrequencyCounter <ulong>(links);
var linkFrequenciesCache = new LinkFrequenciesCache <ulong>(links, totalSequenceSymbolFrequencyCounter);
var index = new CachedFrequencyIncrementingSequenceIndex <ulong>(linkFrequenciesCache);
var linkToItsFrequencyNumberConverter = new FrequenciesCacheBasedLinkToItsFrequencyNumberConverter <ulong>(linkFrequenciesCache);
var sequenceToItsLocalElementLevelsConverter = new SequenceToItsLocalElementLevelsConverter <ulong>(links, linkToItsFrequencyNumberConverter);
var optimalVariantConverter = new OptimalVariantConverter <ulong>(links, sequenceToItsLocalElementLevelsConverter);
var walker = new RightSequenceWalker <ulong>(links, new DefaultStack <ulong>(), (link) => constants.IsExternalReference(link) || links.IsPartialPoint(link));
var unicodeSequencesOptions = new SequencesOptions <ulong>()
{
UseSequenceMarker = true,
SequenceMarkerLink = unicodeSequenceMarker,
UseIndex = true,
Index = index,
LinksToSequenceConverter = optimalVariantConverter,
Walker = walker,
UseGarbageCollection = true
};
var unicodeSequences = new Sequences.Sequences(new SynchronizedLinks <ulong>(links), unicodeSequencesOptions);
// Create some sequences
var strings = _loremIpsumExample.Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
var arrays = strings.Select(x => x.Select(y => addressToNumberConverter.Convert(y)).ToArray()).ToArray();
for (int i = 0; i < arrays.Length; i++)
{
unicodeSequences.Create(arrays[i].ShiftRight());
}
var linksCountAfterCreation = links.Count();
// get list of sequences links
// for each sequence link
// create new sequence version
// if new sequence is not the same as sequence link
// delete sequence link
// collect garbadge
unicodeSequences.CompactAll();
var linksCountAfterCompactification = links.Count();
Assert.True(linksCountAfterCompactification < linksCountAfterCreation);
}
}