/*

* 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:  This is garbage colletion class which sends*

*/

#ifndef _MDSGARBAGECOLLECTOR_H_

#define _MDSGARBAGECOLLECTOR_H_

#include <e32std.h>

#include <e32base.h>

class MMdSGarbageCollectorObserver

	{

	public:

		/*

		 * @return if the garbage collection need to be started again

		 */

		virtual TBool StartGarbageCollectionL() = 0;

	};

class CMdSGarbageCollector : public CActive

{

public:

	virtual ~CMdSGarbageCollector();

	/**

	 * Two phase constructor.

	 * @param aObserver an observer which will be notified when the garbage collector starts.

	 * @return an instance of CMdSGarbageCollector

	 */

	static CMdSGarbageCollector* NewL(MMdSGarbageCollectorObserver& aObserver);

	/**

	 * Two phase constructor.

	 * @param aObserver an observer which will be notified when the garbage collector starts.

 	 * @return an instance of CMdSGarbageCollector

	 */

	static CMdSGarbageCollector* NewLC(MMdSGarbageCollectorObserver& aObserver);

	/**

	 * Starts garbage connection with a delay. The same value will also be used as interval between

	 * following garbage collections if the observer returns ETrue when StartGarbageCollectionL()

	 * is called.

	 * 

	 * @param aDelay delay before garbage collection starts

	 */

	void Start( TInt aDelay );

	/**

	 * Pauses garbage collection.

	 */

	void Pause();

	/**

	 * Resumes garbage collection.

	 */

	void Resume();

private:

	CMdSGarbageCollector(MMdSGarbageCollectorObserver& aObserver);

	void ConstructL();

	virtual void RunL();

	virtual void DoCancel();

	virtual TInt RunError( TInt aError );

private:

	RTimer iTimer;

	TTimeIntervalMicroSeconds32 iDelay;

	TTimeIntervalMicroSeconds32 iNewDelay;

	MMdSGarbageCollectorObserver& iObserver;

};

#endif