// 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();

	}