/*

* Copyright (c) 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:  Listens for changes in a Central Repository key.

*

*/

#ifndef AOCENREPOBSERVER_H

#define AOCENREPOBSERVER_H

// FORWARD DECLARATIONS

class CRepository;

class MAOConnectionObserver;

// Stop requesting new notifications after this many consecutive errors

const TInt KCenRepErrorRetryCount = 80;

/**

* MAOCenRepObserver

*

* Client application must implement the AOCenRepObserver interface in

* order to receive a notification when Central Repository key 

* KCRUidCmManager/ KCurrentCellularDataUsage changes.

*

* @lib PDPCONTEXTMANAGER2.LIB

*/

class MAOCenRepObserver

    {

public:

    /**

    * This method is called every time when Central Repository key 

    * KCRUidCmManager/ KCurrentCellularDataUsage changes.

    *

    * @param aValue The new value for KCurrentCellularDataUsage.

    */

    virtual void CurrentCellularDataUsageChangedL( const TInt aValue ) = 0;

    };

/**

* CAOCenRepObserver

*

* @lib DPCONTEXTMANAGER2.LIB

*/

NONSHARABLE_CLASS( CAOCenRepObserver ) : public CActive

    {

public:

    static CAOCenRepObserver* NewL( MAOCenRepObserver& aObserver );

    static CAOCenRepObserver* NewLC( MAOCenRepObserver& aObserver );

    virtual ~CAOCenRepObserver();

private:

    CAOCenRepObserver( MAOCenRepObserver& aObserver );

    void ConstructL();

    void RequestNotifications();

private: // Methods from base class

    void DoCancel();

    void RunL();

private:

    MAOCenRepObserver& iObserver;

    CRepository*       iRepository;

    TInt               iErrorCounter;

    };

#endif // AOCENREPOBSERVER_H

// End-of-file