/*

* Copyright (c) 2003-2006 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:   Combined task arrival observer and task handler manager

*

*/

// @file taskarrivalobserver.h

#ifndef __TASK_ARRIVAL_OBSERVER_H__

#define __TASK_ARRIVAL_OBSERVER_H__

#include "sit.h"

#include "taskhandler.h"

const TInt KUnfoundIndex = -1;

class CAsyncCleaner;

/**

 * Combined task handler arrival observer and task handler manager.

 */

NONSHARABLE_CLASS(CTaskArrivalObserver) : public CAsyncOneShot, public MEventObserver, public MTaskHandlerManager

    {

public:

    static CTaskArrivalObserver* NewL();

    ~CTaskArrivalObserver();

private: // From CAsyncOneShot

    void RunL();

public:

    void Start();

    void Cancel();

    void DeleteTaskHandler(CTaskHandler* aTaskHandler);

    void DeleteAsyncCleaner(CAsyncCleaner* aAsyncCleaner);

private: // From MEventObserver

    void EventOccured(TInt aStatus, TEventType aType, TDesC8* aData);

private: // From MTaskHandlerManager

    void TaskHandlerComplete(CTaskHandler* handler);

    void TaskHandlerFatalError(CTaskHandler* handler, TInt aError);

private: // Construction

    CTaskArrivalObserver();

    void ConstructL();

private: // Implementation

    void LaunchTaskHandlerL(const TTaskArrivedEventData& aEventSpec);

    CTaskHandler* CreateTaskHandlerL(const TTaskArrivedEventData& aEventSpec);

    TInt FindTaskHandler(CTaskHandler* aTaskHandler);

    TInt FindAsyncCleaner(CAsyncCleaner* aAsyncCleaner);

    void AsyncDeleteTaskHandler(CTaskHandler* aTaskHandler);

private:

    REventMediator iEventMediator;

    CArrayPtrFlat<CTaskHandler>* iTaskHandlerList;

    CArrayPtrFlat<CAsyncCleaner>* iAsyncCleanerList;

    CTaskHandler* iTaskHandlerToDelete;

    };

NONSHARABLE_CLASS(CAsyncCleaner) : public CAsyncOneShot

    {

public:

    CAsyncCleaner(CTaskArrivalObserver* aTaskArrivalObserver,

                  CTaskHandler* aTaskHandlerToDelete);

    void Start();

private: // From CAsyncOneShot

    void RunL();

private:

    CTaskArrivalObserver* iTaskArrivalObserver;

    CTaskHandler* iTaskHandlerToDelete;

    };

#endif // __TASK_ARRIVAL_OBSERVER_H__