harvesterplugins/media/mediautils/inc/mdeobjectqueuemanager.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 19 Apr 2010 14:40:05 +0300
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/*
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  MDE object queuemanager for indexing scheduling
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 *
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*/
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#ifndef MDEOBJECTQUEUEMANAGER_H_
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#define MDEOBJECTQUEUEMANAGER_H_
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#include <e32def.h>
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#include <mdccommon.h>
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#include "mediaobjecthandler.h"
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class CMdeObjectQueueManager : public CActive
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    {
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public:
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    /*
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     * Construction
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     * @param MMediaObjectHandler* callback to media object handler dont own
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     * @return instance of object queue manager
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     */
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    static CMdeObjectQueueManager* NewL(MMediaObjectHandler* ); //For callback
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    /*
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     * Construction
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     * @param MMediaObjectHandler* callback to media object handler dont own
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     * @return instance of object queue manager
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     */
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    static CMdeObjectQueueManager* NewLC(MMediaObjectHandler* );
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    /*
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     * Destructor
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     */
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    virtual ~CMdeObjectQueueManager();
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public:
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    /*
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     * AddMedItemtoQueueL
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     * @param TItemId aObjId item id to be added to queue
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     * @param TCPixActionType aActionType CPIX action on item
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     */
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    void AddMdeItemToQueueL( TItemId aObjId, TCPixActionType aActionType);
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    //From CActive
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    void RunL();
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    void DoCancel();
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    TInt RunError();
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private:
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    /*
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     * OverWriteOrAddToQueueL add or update item to queue
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     * @param TItemId aObjId itemd id
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     * @param TCPixActionType aActionType action cpix
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     */
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    void OverWriteOrAddToQueueL( TItemId aObjId, TCPixActionType aActionType);
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    /*
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     * First phase Constructor
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     * @parm MMediaObjectHandler* media object handler callback
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     */
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    CMdeObjectQueueManager(MMediaObjectHandler* );
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    /*
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     * Second phase constructor
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     */
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    void ConstructL();
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private:
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    enum TState 
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    { 
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        EStateNone = 0, 
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        EStateWaiting 
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    };
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    struct TMdeActionRecord 
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    {
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    TItemId iObjectId;
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    TCPixActionType iAction;
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    TInt    iRetryCount;
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    TMdeActionRecord()
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        {
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        iRetryCount = 0;
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        }
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    };
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private:
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    // Queue of documents to be indexed
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    RArray<TMdeActionRecord> iJobQueue; 
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    // State machine's state
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    TState iState;
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    // Timer which is used to delay indexing messages
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    RTimer iTimer; //Timer for self activation of AO
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    MMediaObjectHandler* iMdeObjectHandler; //media object handler
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    };
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#endif /* MDEOBJECTQUEUEMANAGER_H_ */