public VersionHeadCollection(
IStartupLog startupLog,
IErrorLog errorLog,
IDatabase database)
{
_versions = new Dictionary <ulong, VersionHead>();
_startupLog = startupLog;
_errorLog = errorLog;
_database = database;
_cleanupThread = new Thread(() =>
{
_startupLog.WriteLine("Version clean up thread starting");
while (!_disposing)
{
try
{
Thread.Sleep(50);
List <VersionHead> versions;
lock (_versions) versions = _versions.Values.OrderBy(v => v.VersionNumber).ToList();
foreach (var version in versions)
{
if (version.IsReferenced || version.VersionNumber == _database.CurrentVersion)
{
break;
}
lock (_versions) _versions.Remove(version.VersionNumber);
version.Dispose();
}
}
catch (ThreadAbortException)
{
return;
}
catch (Exception ex)
{
_errorLog.WriteLine("Exception in page collection cleanup thread. " + ex.Message, ex);
}
}
_startupLog.WriteLine("Version clean up thread exiting");
})
{
IsBackground = true,
Name = "Version collection cleanup",
Priority = ThreadPriority.AboveNormal
};
_cleanupThread.Start();
}
public PageHeadCollection(
IFileSet fileSet,
IStartupLog startupLog,
IErrorLog errorLog,
IPagePool pagePool)
{
_pages = new Dictionary <ulong, PageHead>();
_fileSet = fileSet;
_startupLog = startupLog;
_errorLog = errorLog;
_pagePool = pagePool;
_cleanupThread = new Thread(() =>
{
_startupLog.WriteLine("Stale page clean up thread starting");
while (!_disposing)
{
try
{
Thread.Sleep(50);
// TODO: Delete pages that have not been touched for a while and
// have no cached versions
}
catch (ThreadAbortException)
{
return;
}
catch (Exception ex)
{
_errorLog.WriteLine("Exception in page collection cleanup thread. " + ex.Message, ex);
}
}
_startupLog.WriteLine("Stale page clean up thread exiting");
})
{
IsBackground = true,
Name = "Page collection cleanup",
Priority = ThreadPriority.AboveNormal
};
_cleanupThread.Start();
}
public TransactionHeadCollection(
IStartupLog startupLog,
IErrorLog errorLog,
IPagePool pagePool)
{
_transactions = new Dictionary <ulong, TransactionHead>();
_startupLog = startupLog;
_errorLog = errorLog;
_pagePool = pagePool;
_cleanupThread = new Thread(() =>
{
_startupLog.WriteLine("Transaction clean up thread starting");
while (!_disposing)
{
try
{
Thread.Sleep(50);
// TODO: Kill long running and deadlocked transactions
}
catch (ThreadAbortException)
{
return;
}
catch (Exception ex)
{
_errorLog.WriteLine("Exception in page cache stale page cleanup thread. " + ex.Message, ex);
}
}
_startupLog.WriteLine("Transaction clean up thread exiting");
})
{
IsBackground = true,
Name = "Transaction collection cleanup",
Priority = ThreadPriority.AboveNormal
};
_cleanupThread.Start();
}