/*

* Copyright (c) 2005 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: 

*             This class watches for changes to the ECOM registry

*             and forces a recheck of Meeting request availablity

*       

*

*/

#ifndef __CALENECOMWATCHER_H__

#define __CALENECOMWATCHER_H__

//  INCLUDES

#include <e32base.h>

#include <ecom/ecom.h>

class CCalenInterimUtils2Impl;

class MCalenEComChangeObserver;

/**

* CCalenEComWatcher watches for changes to the ECOM registry and forces a recheck

* of meetng request availablity

*/

NONSHARABLE_CLASS(CCalenEComWatcher) : public CActive

    {

    public: 

        /**

        * Constructor.

        * @param aUtils CCalenInterimUtils2Impl reference

        * @return a pointer to the new CCalenEComWatcher instance

        */

        IMPORT_C static CCalenEComWatcher* NewL( MCalenEComChangeObserver& aObserver );

        /**

        * Destructor

        */

        ~CCalenEComWatcher();

        /**

        * From CActive

        * Called when outstanding asynchronous request completes

        * This will be called when iNotificationTimer either completes

        * or is cancelled

        */

        void RunL();

        /**

        * From CActive

        * Called by the active scheduler if RunL leaves

        * Ensures we are ready to receive the next database event

        */

        TInt RunError();

        /**

        * From CActive

        * Implements cancellation of outstanding asynchronous requests

        * Cancels iNotificationTimer if started

        */

        void DoCancel();

    private:

        /**

        * C++ default constructor.

        * @param aUtils CCalenInterimUtils2Impl reference

        */

        CCalenEComWatcher( MCalenEComChangeObserver& aObserver );

        /**

        * By default Symbian 2nd phase constructor is private.

        * Performs any construction which may leave

        */

        void ConstructL();

    private:

        REComSession iSession;

        MCalenEComChangeObserver& iEComObserver;

    };

#endif // __CALENECOMWATCHER_H__

// End of File