//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private void evict(long pageRef, org.neo4j.io.pagecache.tracing.EvictionEvent evictionEvent) throws java.io.IOException
private void Evict(long pageRef, EvictionEvent evictionEvent)
{
long filePageId = GetFilePageId(pageRef);
evictionEvent.FilePageId = filePageId;
evictionEvent.CachePageId = pageRef;
int swapperId = GetSwapperId(pageRef);
if (swapperId != 0)
{
// If the swapper id is non-zero, then the page was not only loaded, but also bound, and possibly modified.
SwapperSet.SwapperMapping swapperMapping = _swappers.getAllocation(swapperId);
if (swapperMapping != null)
{
// The allocation can be null if the file has been unmapped, but there are still pages
// lingering in the cache that were bound to file page in that file.
PageSwapper swapper = swapperMapping.Swapper;
evictionEvent.Swapper = swapper;
if (IsModified(pageRef))
{
FlushModifiedPage(pageRef, evictionEvent, filePageId, swapper);
}
swapper.Evicted(filePageId);
}
}
ClearBinding(pageRef);
}
public PinEventAnonymousInnerClass(RecordingPageCursorTracer outerInstance, long filePageId, PageSwapper swapper)
{
this.outerInstance = outerInstance;
this._filePageId = filePageId;
this._swapper = swapper;
hit = true;
}
private void AllocateAndAddTenThousand(MutableIntSet allocated, PageSwapper swapper)
{
for (int i = 0; i < 10_000; i++)
{
AllocateAndAdd(allocated, swapper);
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: void fault(long pageRef, org.neo4j.io.pagecache.PageSwapper swapper, int swapperId, long filePageId, org.neo4j.io.pagecache.tracing.PageFaultEvent event) throws java.io.IOException
internal virtual void Fault(long pageRef, PageSwapper swapper, int swapperId, long filePageId, PageFaultEvent @event)
{
if (swapper == null)
{
throw SwapperCannotBeNull();
}
int currentSwapper = GetSwapperId(pageRef);
long currentFilePageId = GetFilePageId(pageRef);
if (filePageId == PageCursor.UNBOUND_PAGE_ID || !IsExclusivelyLocked(pageRef) || currentSwapper != 0 || currentFilePageId != PageCursor.UNBOUND_PAGE_ID)
{
throw CannotFaultException(pageRef, swapper, swapperId, filePageId, currentSwapper, currentFilePageId);
}
// Note: It is important that we assign the filePageId before we swap
// the page in. If the swapping fails, the page will be considered
// loaded for the purpose of eviction, and will eventually return to
// the freelist. However, because we don't assign the swapper until the
// swapping-in has succeeded, the page will not be considered bound to
// the file page, so any subsequent thread that finds the page in their
// translation table will re-do the page fault.
SetFilePageId(pageRef, filePageId); // Page now considered isLoaded()
long bytesRead = swapper.Read(filePageId, GetAddress(pageRef), _cachePageSize);
@event.AddBytesRead(bytesRead);
@event.CachePageId = ToId(pageRef);
SetSwapperId(pageRef, swapperId); // Page now considered isBoundTo( swapper, filePageId )
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test void mustDisableStripingIfToldTo() throws java.io.IOException
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void MustDisableStripingIfToldTo()
{
// given
int bytesPerPage = 32;
PageSwapperFactory factory = CreateSwapperFactory();
FileSystemAbstraction fs = mock(typeof(FileSystemAbstraction));
StoreChannel channel = mock(typeof(StoreChannel));
when(channel.TryLock()).thenReturn(mock(typeof(FileLock)));
when(fs.Create(any(typeof(File)))).thenReturn(channel);
when(fs.Open(any(typeof(File)), any())).thenReturn(channel);
// when
factory.Open(fs, Configuration.EMPTY);
PageSwapper swapper = CreateSwapper(factory, _file, bytesPerPage, NoCallback, true, true);
try
{
// then
verify(fs, times(1)).open(eq(_file), any(typeof(OpenMode)));
}
finally
{
swapper.Close();
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) @DisabledOnOs(org.junit.jupiter.api.condition.OS.WINDOWS) void fileMustRemainLockedEvenIfChannelIsClosedByStrayInterrupt(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void FileMustRemainLockedEvenIfChannelIsClosedByStrayInterrupt(int noChannelStriping)
{
PageSwapperFactory factory = CreateSwapperFactory();
factory.Open(_fileSystem, Configuration.EMPTY);
File file = TestDir.file("file");
_fileSystem.create(file).close();
PageSwapper pageSwapper = CreateSwapper(factory, file, 4, NoCallback, false, Bool(noChannelStriping));
try
{
StoreChannel channel = _fileSystem.open(file, OpenMode.READ_WRITE);
Thread.CurrentThread.Interrupt();
pageSwapper.Force();
assertThrows(typeof(OverlappingFileLockException), channel.tryLock);
}
finally
{
pageSwapper.Close();
}
}
/// <summary>
/// Allocate a new swapper id for the given <seealso cref="PageSwapper"/>.
/// </summary>
internal int Allocate(PageSwapper swapper)
{
lock (this)
{
SwapperMapping[] swapperMappings = this._swapperMappings;
// First look for an available freed slot.
lock ( _free )
{
if (!_free.Empty)
{
int id = _free.intIterator().next();
_free.remove(id);
swapperMappings[id] = new SwapperMapping(id, swapper);
this._swapperMappings = swapperMappings; // Volatile store synchronizes-with loads in getters.
return(id);
}
}
// No free slot was found above, so we extend the array to make room for a new slot.
int id = swapperMappings.Length;
if (id + 1 > _maxSwapperId)
{
throw new System.InvalidOperationException("All swapper ids are allocated: " + _maxSwapperId);
}
swapperMappings = Arrays.copyOf(swapperMappings, id + 1);
swapperMappings[id] = new SwapperMapping(id, swapper);
this._swapperMappings = swapperMappings; // Volatile store synchronizes-with loads in getters.
return(id);
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void mustHandleMischiefInPositionedVectoredRead(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void MustHandleMischiefInPositionedVectoredRead(int noChannelStriping)
{
int bytesTotal = 512;
int bytesPerPage = 32;
int pageCount = bytesTotal / bytesPerPage;
sbyte[] data = new sbyte[bytesTotal];
ThreadLocalRandom.current().NextBytes(data);
PageSwapperFactory factory = CreateSwapperFactory();
factory.Open(Fs, Configuration.EMPTY);
File file = File;
PageSwapper swapper = CreateSwapper(factory, file, bytesTotal, NoCallback, true, Bool(noChannelStriping));
try
{
long page = CreatePage(data);
swapper.Write(0, page);
}
finally
{
swapper.Close();
}
RandomAdversary adversary = new RandomAdversary(0.5, 0.0, 0.0);
factory.Open(new AdversarialFileSystemAbstraction(adversary, Fs), Configuration.EMPTY);
swapper = CreateSwapper(factory, file, bytesPerPage, NoCallback, false, Bool(noChannelStriping));
long[] pages = new long[pageCount];
for (int i = 0; i < pageCount; i++)
{
pages[i] = CreatePage(bytesPerPage);
}
sbyte[] temp = new sbyte[bytesPerPage];
try
{
for (int i = 0; i < 10_000; i++)
{
foreach (long page in pages)
{
Clear(page);
}
assertThat(swapper.Read(0, pages, bytesPerPage, 0, pages.Length), @is(( long )bytesTotal));
for (int j = 0; j < pageCount; j++)
{
Array.Copy(data, j * bytesPerPage, temp, 0, bytesPerPage);
assertThat(Array(pages[j]), @is(temp));
}
}
}
finally
{
swapper.Close();
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private long pageFault(long filePageId, org.neo4j.io.pagecache.PageSwapper swapper, long chunkOffset, int[] chunk, LatchMap.Latch latch) throws java.io.IOException
private long PageFault(long filePageId, PageSwapper swapper, long chunkOffset, int[] chunk, LatchMap.Latch latch)
{
// We are page faulting. This is a critical time, because we currently have the given latch in the chunk array
// slot that we are faulting into. We MUST make sure to release that latch, and remove it from the chunk, no
// matter what happens. Otherwise other threads will get stuck waiting forever for our page fault to finish.
// If we manage to get a free page to fault into, then we will also be taking a write lock on that page, to
// protect it against concurrent eviction as we assigning a binding to the page. If anything goes wrong, then
// we must make sure to release that write lock as well.
PageFaultEvent faultEvent = PinEvent.beginPageFault();
long pageRef;
try
{
// The grabFreePage method might throw.
pageRef = PagedFile.grabFreeAndExclusivelyLockedPage(faultEvent);
// We got a free page, and we know that we have race-free access to it. Well, it's not entirely race
// free, because other paged files might have it in their translation tables (or rather, their reads of
// their translation tables might race with eviction) and try to pin it.
// However, they will all fail because when they try to pin, because the page will be exclusively locked
// and possibly bound to our page.
}
catch (Exception throwable)
{
// Make sure to unstuck the page fault latch.
AbortPageFault(throwable, chunk, chunkOffset, latch, faultEvent);
throw throwable;
}
try
{
// Check if we're racing with unmapping. We have the page lock
// here, so the unmapping would have already happened. We do this
// check before page.fault(), because that would otherwise reopen
// the file channel.
AssertPagedFileStillMappedAndGetIdOfLastPage();
PagedFile.initBuffer(pageRef);
PagedFile.fault(pageRef, swapper, PagedFile.swapperId, filePageId, faultEvent);
}
catch (Exception throwable)
{
// Make sure to unlock the page, so the eviction thread can pick up our trash.
PagedFile.unlockExclusive(pageRef);
// Make sure to unstuck the page fault latch.
AbortPageFault(throwable, chunk, chunkOffset, latch, faultEvent);
throw throwable;
}
// Put the page in the translation table before we undo the exclusive lock, as we could otherwise race with
// eviction, and the onEvict callback expects to find a MuninnPage object in the table.
UnsafeUtil.putIntVolatile(chunk, chunkOffset, PagedFile.toId(pageRef));
// Once we page has been published to the translation table, we can convert our exclusive lock to whatever we
// need for the page cursor.
ConvertPageFaultLock(pageRef);
latch.Release();
faultEvent.Done();
return(pageRef);
}
private void AllocateFreeAndAssertNotReused(PageSwapper swapper, MutableIntSet ids, int i)
{
int id = _set.allocate(swapper);
_set.free(id);
if (!ids.add(id))
{
fail("Expected ids.add( id ) to return true for id " + id + " in iteration " + i + " but it instead returned false");
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void mustHandleMischiefInPositionedVectoredWrite(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void MustHandleMischiefInPositionedVectoredWrite(int noChannelStriping)
{
int bytesTotal = 512;
int bytesPerPage = 32;
int pageCount = bytesTotal / bytesPerPage;
sbyte[] data = new sbyte[bytesTotal];
ThreadLocalRandom.current().NextBytes(data);
long zeroPage = CreatePage(bytesPerPage);
Clear(zeroPage);
File file = File;
PageSwapperFactory factory = CreateSwapperFactory();
RandomAdversary adversary = new RandomAdversary(0.5, 0.0, 0.0);
factory.Open(new AdversarialFileSystemAbstraction(adversary, Fs), Configuration.EMPTY);
PageSwapper swapper = CreateSwapper(factory, file, bytesPerPage, NoCallback, true, Bool(noChannelStriping));
long[] writePages = new long[pageCount];
long[] readPages = new long[pageCount];
long[] zeroPages = new long[pageCount];
for (int i = 0; i < pageCount; i++)
{
writePages[i] = CreatePage(bytesPerPage);
PutBytes(writePages[i], data, 0, i * bytesPerPage, bytesPerPage);
readPages[i] = CreatePage(bytesPerPage);
zeroPages[i] = zeroPage;
}
try
{
for (int i = 0; i < 10_000; i++)
{
adversary.ProbabilityFactor = 0;
swapper.Write(0, zeroPages, 0, pageCount);
adversary.ProbabilityFactor = 1;
swapper.Write(0, writePages, 0, pageCount);
foreach (long readPage in readPages)
{
Clear(readPage);
}
adversary.ProbabilityFactor = 0;
assertThat(swapper.Read(0, readPages, bytesPerPage, 0, pageCount), @is(( long )bytesTotal));
for (int j = 0; j < pageCount; j++)
{
assertThat(Array(readPages[j]), @is(Array(writePages[j])));
}
}
}
finally
{
swapper.Close();
}
}
internal void Initialise(MuninnPagedFile pagedFile, long pageId, int pfFlags)
{
this.Swapper = pagedFile.Swapper;
this.SwapperId = pagedFile.SwapperId;
this._filePageSize = pagedFile.FilePageSize;
this.PagedFile = pagedFile;
this.PageId = pageId;
this.PfFlags = pfFlags;
this.EagerFlush = IsFlagRaised(pfFlags, PF_EAGER_FLUSH);
this.NoFault = IsFlagRaised(pfFlags, PF_NO_FAULT);
this.NoGrow = NoFault | IsFlagRaised(pfFlags, Org.Neo4j.Io.pagecache.PagedFile_Fields.PfNoGrow);
}
public void Vote(bool value)
{
PageSwapper.SetPage(PageSwapper.Page + 1, true);
PlayerPrefs.SetInt("currentDatingPage", PageSwapper.Page);
if (value && Random.Range(0f, 1f) > .5f)
{
Profile p = Data.SearchProfile(photo.sprite);
if (p != null && !Data.chats.Contains(p))
{
Data.chats.Add(p);
}
}
}
public override MajorFlushEvent BeginFileFlush(PageSwapper swapper)
{
Latch.Signal();
try
{
Latch.await();
}
catch (InterruptedException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
}
return(MajorFlushEvent.NULL);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void mustZeroFillPageBeyondEndOfFile(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void MustZeroFillPageBeyondEndOfFile(int noChannelStriping)
{
sbyte[] bytes = new sbyte[] { 1, 2, 3, 4, 5, 6 };
StoreChannel channel = Fs.create(File);
channel.WriteAll(Wrap(bytes));
channel.close();
PageSwapperFactory factory = CreateSwapperFactory();
PageSwapper swapper = CreateSwapper(factory, File, 4, null, false, Bool(noChannelStriping));
long target = CreatePage(4);
swapper.Read(1, target, SizeOfAsInt(target));
assertThat(Array(target), byteArray(new sbyte[] { 5, 6, 0, 0 }));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void swappingInMustFillPageWithData(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void SwappingInMustFillPageWithData(int noChannelStriping)
{
sbyte[] bytes = new sbyte[] { 1, 2, 3, 4 };
StoreChannel channel = Fs.create(File);
channel.WriteAll(Wrap(bytes));
channel.close();
PageSwapperFactory factory = CreateSwapperFactory();
PageSwapper swapper = CreateSwapper(factory, File, 4, null, false, Bool(noChannelStriping));
long target = CreatePage(4);
swapper.Read(0, target, SizeOfAsInt(target));
assertThat(Array(target), byteArray(bytes));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void mustHandleMischiefInPositionedRead(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void MustHandleMischiefInPositionedRead(int noChannelStriping)
{
int bytesTotal = 512;
sbyte[] data = new sbyte[bytesTotal];
ThreadLocalRandom.current().NextBytes(data);
PageSwapperFactory factory = CreateSwapperFactory();
factory.Open(Fs, Configuration.EMPTY);
File file = File;
PageSwapper swapper = CreateSwapper(factory, file, bytesTotal, NoCallback, true, Bool(noChannelStriping));
try
{
long page = CreatePage(data);
swapper.Write(0, page);
}
finally
{
swapper.Close();
}
RandomAdversary adversary = new RandomAdversary(0.5, 0.0, 0.0);
factory.Open(new AdversarialFileSystemAbstraction(adversary, Fs), Configuration.EMPTY);
swapper = CreateSwapper(factory, file, bytesTotal, NoCallback, false, Bool(noChannelStriping));
long page = CreatePage(bytesTotal);
try
{
for (int i = 0; i < 10_000; i++)
{
Clear(page);
assertThat(swapper.Read(0, page, SizeOfAsInt(page)), @is(( long )bytesTotal));
assertThat(Array(page), @is(data));
}
}
finally
{
swapper.Close();
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void swappingOutMustWritePageToFile(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void SwappingOutMustWritePageToFile(int noChannelStriping)
{
Fs.create(File).close();
sbyte[] expected = new sbyte[] { 1, 2, 3, 4 };
long page = CreatePage(expected);
PageSwapperFactory factory = CreateSwapperFactory();
PageSwapper swapper = CreateSwapper(factory, File, 4, null, false, Bool(noChannelStriping));
swapper.Write(0, page);
Stream stream = Fs.openAsInputStream(File);
sbyte[] actual = new sbyte[expected.Length];
assertThat(stream.Read(actual, 0, actual.Length), @is(actual.Length));
assertThat(actual, byteArray(expected));
}
public static void OpenChat(Profile profile)
{
if (SceneManager.GetActiveScene().name != "Chat")
{
SceneManager.LoadScene("Chat");
}
Text name = GameObject.Find("Canvas/Grid/Page1/TopBar/Name").GetComponent <Text>();
Image image = GameObject.Find("Canvas/Grid/Page1/TopBar/PhotoMask/Photo").GetComponent <Image>();
name.text = profile.name;
image.sprite = profile.profilePic;
MessageHandler messageHandler = GameObject.Find("Canvas/Grid/Page1/InputBar/InputField").GetComponent <MessageHandler>();
Debug.Log("message");
messageHandler.SetMessages(profile);
PageSwapper.SetPage(1);
}
/// <summary>
/// The OverlappingFileLockException is thrown when tryLock is called on the same file *in the same JVM*.
/// </summary>
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) @DisabledOnOs(org.junit.jupiter.api.condition.OS.WINDOWS) void creatingSwapperForFileMustTakeLockOnFile(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void CreatingSwapperForFileMustTakeLockOnFile(int noChannelStriping)
{
PageSwapperFactory factory = CreateSwapperFactory();
factory.Open(_fileSystem, Configuration.EMPTY);
File file = TestDir.file("file");
_fileSystem.create(file).close();
PageSwapper pageSwapper = CreateSwapper(factory, file, 4, NoCallback, false, Bool(noChannelStriping));
try
{
StoreChannel channel = _fileSystem.open(file, OpenMode.READ_WRITE);
assertThrows(typeof(OverlappingFileLockException), channel.tryLock);
}
finally
{
pageSwapper.Close();
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @ParameterizedTest @ValueSource(ints = {0, 1}) void swappingOutMustNotOverwriteDataBeyondPage(int noChannelStriping) throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void SwappingOutMustNotOverwriteDataBeyondPage(int noChannelStriping)
{
sbyte[] initialData = new sbyte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
sbyte[] finalData = new sbyte[] { 1, 2, 3, 4, 8, 7, 6, 5, 9, 10 };
StoreChannel channel = Fs.create(File);
channel.WriteAll(Wrap(initialData));
channel.close();
sbyte[] change = new sbyte[] { 8, 7, 6, 5 };
long page = CreatePage(change);
PageSwapperFactory factory = CreateSwapperFactory();
PageSwapper swapper = CreateSwapper(factory, File, 4, null, false, Bool(noChannelStriping));
swapper.Write(1, page);
Stream stream = Fs.openAsInputStream(File);
sbyte[] actual = new sbyte[( int )Fs.getFileSize(File)];
assertThat(stream.Read(actual, 0, actual.Length), @is(actual.Length));
assertThat(actual, byteArray(finalData));
}
void Start()
{
PageSwapper.SetPage(PlayerPrefs.GetInt("currentDatingPage"));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @BeforeEach public void setUp()
public virtual void SetUp()
{
_tracer = new DefaultPageCacheTracer();
_swapper = new DummyPageSwapper("filename", ( int )ByteUnit.kibiBytes(8));
}
public override MajorFlushEvent BeginFileFlush(PageSwapper swapper)
{
return(@delegate.BeginFileFlush(swapper));
}
public override FlushEvent BeginFlush(long filePageId, long cachePageId, PageSwapper swapper)
{
return(Tracer.add(new FlushHEvent(Tracer, filePageId, cachePageId, swapper)));
}
internal PinHEvent(LinearHistoryTracer tracer, bool exclusiveLock, long filePageId, PageSwapper swapper) : base(tracer)
{
this.ExclusiveLock = exclusiveLock;
this.FilePageId = filePageId;
this.HitConflict = true;
this.File = swapper.File();
}
internal FlushHEvent(LinearHistoryTracer tracer, long filePageId, long cachePageId, PageSwapper swapper) : base(tracer)
{
this.FilePageId = filePageId;
this.CachePageId = cachePageId;
this.PageCount = 1;
this.File = swapper.File();
}
public override MajorFlushEvent BeginFileFlush(PageSwapper swapper)
{
return(_tracer.add(new MajorFlushHEvent(_tracer, swapper.File())));
}
internal SwapperMapping(int id, PageSwapper swapper)
{
this.Id = id;
this.Swapper = swapper;
}
public override MajorFlushEvent BeginFileFlush(PageSwapper swapper)
{
return(MajorFlushEvent.NULL);
}
