//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 countPageFaultsAndBytesRead()
internal virtual void CountPageFaultsAndBytesRead()
{
PinEvent pinEvent = _pageCursorTracer.beginPin(true, 0, _swapper);
{
PageFaultEvent pageFaultEvent = pinEvent.BeginPageFault();
{
pageFaultEvent.AddBytesRead(42);
}
pageFaultEvent.Done();
pageFaultEvent = pinEvent.BeginPageFault();
{
pageFaultEvent.AddBytesRead(42);
}
pageFaultEvent.Done();
}
pinEvent.Done();
assertEquals(1, _pageCursorTracer.pins());
assertEquals(1, _pageCursorTracer.unpins());
assertEquals(2, _pageCursorTracer.faults());
assertEquals(84, _pageCursorTracer.bytesRead());
}
private void GenerateEventSet()
{
PinEvent pinEvent = _pageCursorTracer.beginPin(false, 0, _swapper);
{
PageFaultEvent pageFaultEvent = pinEvent.BeginPageFault();
pageFaultEvent.AddBytesRead(150);
{
EvictionEvent evictionEvent = pageFaultEvent.BeginEviction();
{
FlushEventOpportunity flushEventOpportunity = evictionEvent.FlushEventOpportunity();
FlushEvent flushEvent = flushEventOpportunity.BeginFlush(0, 0, _swapper);
flushEvent.AddBytesWritten(10);
flushEvent.Done();
}
evictionEvent.ThrewException(new IOException("eviction exception"));
evictionEvent.Close();
}
pageFaultEvent.Done();
}
pinEvent.Done();
}
