loggingservices/eventlogger/LogServ/src/LOGCOMP.CPP
changeset 0 08ec8eefde2f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/loggingservices/eventlogger/LogServ/src/LOGCOMP.CPP	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,81 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include "LOGCOMP.H"
+#include "logservpanic.h"
+#include "LogServDatabaseTransactionInterface.h"
+
+// Constants
+const TInt KLogMaxWastedSpacePercentage = 25;
+const TInt KLogMaxWastedSpace = 128 * 1024;
+const TInt KLogMinWastedSpace = 32 * 1024;
+
+
+CLogCompact::CLogCompact(MLogServDatabaseTransactionInterface& aDatabase, TInt aPriority)
+: CLogActive(aPriority), iDatabase(aDatabase)
+	{
+	}
+
+void CLogCompact::Start(TRequestStatus& aStatus)
+	{
+	__ASSERT_DEBUG(!IsActive(), Panic(ELogAlreadyActive5));
+	
+	TInt error = iOperation.UpdateStats(iDatabase.DTIDatabase(), iStep());
+	iCompact = EFalse;
+
+	Queue(aStatus);
+	TRequestStatus* st = &iStatus;
+	User::RequestComplete(st, error);
+	SetActive();
+	}
+
+void CLogCompact::DoRunL()
+	{
+	if (iStep() > 0)
+		{
+		iOperation.Next(iStep, iStatus);
+		SetActive();
+		}
+	else if (!iCompact && CompactRequired())
+		{
+		iOperation.Close();
+
+		iCompact = ETrue;
+		User::LeaveIfError(iOperation.Compact(iDatabase.DTIDatabase(), iStep()));
+
+		if (iStep() > 0)
+			{
+			TRequestStatus* st = &iStatus;
+			User::RequestComplete(st, KErrNone);
+
+			SetActive();
+			}
+		}
+	}
+
+TBool CLogCompact::CompactRequired() const
+	{
+	RDbDatabase::TSize size = iDatabase.DTIDatabase().Size();
+	if (size.iUsage < 0)
+		return EFalse;
+
+	const TInt wastedSpace = (size.iSize * (100 - size.iUsage)) / 100;
+	return (wastedSpace > KLogMinWastedSpace && (100 - size.iUsage) > KLogMaxWastedSpacePercentage) || wastedSpace > KLogMaxWastedSpace;
+	}
+
+void CLogCompact::DoComplete(TInt&)
+	{
+	iOperation.Close();
+	}