/*

* Copyright (c) 2006-2006 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:  Handles periodical database cleanup routines

*

*/

#include <ecom.h>

#include "psdatabase.h"

#include "psdatabasecleanup.h"

#include "psdebug.h"

const TInt KPSCleanupInterval = 480000000; // Interval for periodical compaction attempts

const TInt KPSRequestCleanupCheckDelay = 20000000; // Delay when compaction attempt is done after a request to check.

const TInt KPSCleanupAmountOfDirtAllowed = 300*1024; // Amount of dirty data allowed in database (bytes).

const TInt KPSCleanupCompactThresholdPercentage = 50; // Threshold percentage in database data efficiency when db compact process is triggered.

// ======== LOCAL FUNCTIONS ========

namespace

    {

    // ---------------------------------------------------------------------------

    // ?description_if_needed

    // ---------------------------------------------------------------------------

    //

    void CleanupImplArray( TAny* aSelf )

        {

        RImplInfoPtrArray& self = *static_cast<RImplInfoPtrArray*>( aSelf );

        self.ResetAndDestroy();

        self.Close();

        }

    }

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

CPSDatabaseCleanup::CPSDatabaseCleanup( RPSDatabase& aDatabase )

    : CTimer( CActive::EPriorityStandard ), iDatabase( aDatabase )

    {

    CActiveScheduler::Add( this );

    }

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

void CPSDatabaseCleanup::ConstructL()

    {

    CTimer::ConstructL();

    RunL();

    }

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

CPSDatabaseCleanup* CPSDatabaseCleanup::NewL( RPSDatabase& aDatabase )

    {

    CPSDatabaseCleanup* self = new ( ELeave ) CPSDatabaseCleanup( aDatabase );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

CPSDatabaseCleanup::~CPSDatabaseCleanup()

    {

    Cancel();

    }

// ---------------------------------------------------------------------------

// From class ?base_class.

// ?implementation_description

// ---------------------------------------------------------------------------

//

void CPSDatabaseCleanup::RunL()

    {

    After( KPSCleanupInterval );

    User::LeaveIfError( iDatabase.UpdateStats() ); // Update the statistics

    RDbDatabase::TSize size = iDatabase.Size();

    PSDEBUG( "PSDatabaseCleanup::RunL()" );

    PSDEBUG3( "\tCompacting the database: iSize = %d, iUsage = %d", size.iSize, size.iUsage );

    // Perform database compaction only if efficient data in database in percents is below defined percentage or the amount of dirty

    // data in database file is at least a defined constant value of bytes.

    TInt dirt = size.iSize * (100 - size.iUsage) / 100;

    if (dirt > KPSCleanupAmountOfDirtAllowed || size.iUsage < KPSCleanupCompactThresholdPercentage)

    	{

        User::LeaveIfError( iDatabase.Compact() );

        PSDEBUG3( "\tDatabase compacted succesfully: iSize = %d, iUsage = %d", iDatabase.Size().iSize, iDatabase.Size().iUsage );

    	}

    // Perform orphan cleanup.

    DeleteOrphanedPresetsL();

    }

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

void CPSDatabaseCleanup::DeleteOrphanedPresetsL()

    {

    RArray<TInt> dataHandlers;

    CleanupClosePushL( dataHandlers );

    RImplInfoPtrArray implementations;

    CleanupStack::PushL( TCleanupItem( CleanupImplArray, &implementations ) );

    REComSession::ListImplementationsL( KPSPresetInterface, implementations );

    for ( TInt i = 0; i < implementations.Count(); i++ )

        {

        dataHandlers.AppendL( implementations[i]->ImplementationUid().iUid );

        }

    CleanupStack::PopAndDestroy(); // implementations

    REComSession::FinalClose();

    iDatabase.DeleteOrphanedPresetsL( dataHandlers );

    CleanupStack::PopAndDestroy( &dataHandlers );

    }

// ---------------------------------------------------------------------------

// ?description_if_needed

// ---------------------------------------------------------------------------

//

void CPSDatabaseCleanup::RequestCleanupCheck()

	{

	Cancel();

	After(KPSRequestCleanupCheckDelay);

	}

// ======== GLOBAL FUNCTIONS ========