/*

* Copyright (c) 2008-2009 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:  active object, that monitors link disconnection

*

*/

#ifndef C_DISCONNECTIONOBSERVER_H

#define C_DISCONNECTIONOBSERVER_H

#include <e32base.h>

// FORWARD DECLARATIONS

class CIkeConnectionInterface;

/**

 *  Disconnection observer callback interface.

 *  Callback interface which is used by CDisconnectionObserver object to notify

 *  about link disconnection.

 * 

 *  @lib internal (kmdserver.exe)

  */

class MDisconnectionObserverCallback

    {

public:        

    /**

     * Notifies about disconnection.

     * @param aStatus Completion status

     */

    virtual void DisconnectIndication( TInt aStatus ) = 0;

    };

/**

 *  Disconnection observer.

 *  Active object provides functionality for notifying link disconnection.

 *

 *  @lib internal (kmdserver.exe)

  */

class CDisconnectionObserver : public CActive

    {

public:

    /**

     * Two-phased constructor.

     * @param aIkeConnectionInterface IKE connection interface

     * @param aCallback Callback interface

     */

    static CDisconnectionObserver* NewL( CIkeConnectionInterface& aIkeConnectionInterface,

                                         MDisconnectionObserverCallback& aCallback );

    /**

     * Destructor.

     */

    ~CDisconnectionObserver();

    /**

     * Starts observing Link disconnection. Link disconnection is notified via

     * MDisconnectionObserverCallback interface.

     */

    void StartObserving();

private:

    CDisconnectionObserver( CIkeConnectionInterface& aIkeConnectionInterface,

                            MDisconnectionObserverCallback& aCallback );

// from base class CActive

    /**

     * From CActive

     * Handles completion of asynchronous notification request.

     */    

    void RunL();

    /**

     * From CActive

     * Handles cancellation of asynchronous notification request.

     */    

    void DoCancel();

private: // data

    /**

     * IKE connection interface.

     * Not own.

     */

    CIkeConnectionInterface&        iIkeConnectionInterface;

    /**

     * Callback interface.

     * Not own.

     */

    MDisconnectionObserverCallback& iCallback;

    };

#endif // C_DISCONNECTIONOBSERVER_H