videocollection/mpxmyvideoscollection/src/vcxmyvideosactivetask.cpp
author hgs
Fri, 16 Apr 2010 18:13:14 +0300
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permissions -rw-r--r--
201015
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/*
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* Copyright (c) 2007 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 the License "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:   Active object to split up long running db tasks*
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*/
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// INCLUDE FILES
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#include <e32base.h>
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#include <mpxlog.h>
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#include "vcxmyvideosactivetask.h"
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// ============================ MEMBER FUNCTIONS =============================
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// ---------------------------------------------------------------------------
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// Constructor
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// ---------------------------------------------------------------------------
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//
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CVcxMyVideosActiveTask::CVcxMyVideosActiveTask( MVcxMyVideosActiveTaskObserver& aObserver ) :
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    CActive( CActive::EPriorityStandard ),
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    iObserver( aObserver )
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    {
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// 2nd-phase constructor
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::ConstructL()
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    {
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    }
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// ---------------------------------------------------------------------------
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// Two-Phase Constructor
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// ---------------------------------------------------------------------------
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//
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CVcxMyVideosActiveTask* CVcxMyVideosActiveTask::NewL( MVcxMyVideosActiveTaskObserver& aObserver )
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    {
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    CVcxMyVideosActiveTask* self = new(ELeave) CVcxMyVideosActiveTask( aObserver);
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CVcxMyVideosActiveTask::~CVcxMyVideosActiveTask()
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    {
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    Cancel();
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    delete iCurCommand;
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    }
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// ---------------------------------------------------------------------------
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// Start the operation
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::StartL( TMPXCommandId aTask, const CMPXCommand& aCommand )
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    {
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    delete iCurCommand;
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    iCurCommand = NULL;
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    iCurCommand = CMPXMedia::NewL( aCommand );
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    iCurTask = aTask;
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    iCurStep = 0;
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    // Start the AO
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    iStatus = KRequestPending;
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    MPX_DEBUG1("CVcxMyVideosActiveTask::StartL SetActive");
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    SetActive();
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    TRequestStatus* status = &iStatus;
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    User::RequestComplete( status, KErrNone );
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    }
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// ---------------------------------------------------------------------------
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// Get the current step
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// ---------------------------------------------------------------------------
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//
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TInt CVcxMyVideosActiveTask::GetStep()
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    {
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    return iCurStep;
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    }
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// ---------------------------------------------------------------------------
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// Get the current task
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// ---------------------------------------------------------------------------
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//
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TMPXCommandId CVcxMyVideosActiveTask::GetTask()
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    {
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    return iCurTask;
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    }
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// ---------------------------------------------------------------------------
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// Get the current media
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// ---------------------------------------------------------------------------
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//
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CMPXMedia& CVcxMyVideosActiveTask::GetCommand()
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    {
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    return *iCurCommand;
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    }
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// ---------------------------------------------------------------------------
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// Get the current media
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// ---------------------------------------------------------------------------
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//
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CMPXMedia* CVcxMyVideosActiveTask::Command()
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    {
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    return iCurCommand;
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    }
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// ---------------------------------------------------------------------------
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// From CActive
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::RunL()
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    {
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    MPX_DEBUG1("CVcxMyVideosActiveTask::RunL() start");
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    switch ( iObserver.HandleStepL() )
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        {
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        case MVcxMyVideosActiveTaskObserver::EDone:
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            Done();
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            break;
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        case MVcxMyVideosActiveTaskObserver::EMoreToCome:
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            ContinueStepping();
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            break;
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        //observer is responsible for calling Done, Cancel or ContinueStepping
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        case MVcxMyVideosActiveTaskObserver::EStopStepping:
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            MPX_DEBUG1("CVcxMyVideosActiveTask::RunL stopped stepping");
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            iStopped = ETrue;
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            break;
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        }
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    MPX_DEBUG1("CVcxMyVideosActiveTask::RunL() exit");
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    }
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// ---------------------------------------------------------------------------
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// CVcxMyVideosActiveTask::Done
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::Done()
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    {
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    MPX_DEBUG1("CVcxMyVideosActiveTask::Done() start");
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    iObserver.HandleOperationCompleted( KErrNone );
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    delete iCurCommand;
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    iCurCommand = NULL;
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    iStopped = EFalse;
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    MPX_DEBUG1("CVcxMyVideosActiveTask::Done() exit");
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    }
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// ---------------------------------------------------------------------------
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// CVcxMyVideosActiveTask::ContinueStepping
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::ContinueStepping()
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    {
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    ++iCurStep;
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    iStatus = KRequestPending;
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    MPX_DEBUG1("CVcxMyVideosActiveTask::ContinueStepping SetActive");
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    SetActive();
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    iStopped = EFalse;
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    TRequestStatus* status = &iStatus;
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    User::RequestComplete( status, KErrNone );
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    }
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void CVcxMyVideosActiveTask::Cancel()
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    {
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    if ( iStopped && !IsActive() )
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        {
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        MPX_DEBUG1("CVcxMyVideosActiveTask:: was paused, calling DoCancel()");
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        DoCancel();
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        }
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    else
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        {
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        MPX_DEBUG1("CVcxMyVideosActiveTask:: wasn't paused, calling CActive::Cancel() normally");
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        CActive::Cancel();
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        }
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    }
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// ---------------------------------------------------------------------------
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// From CActive
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// ---------------------------------------------------------------------------
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//
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void CVcxMyVideosActiveTask::DoCancel()
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    {
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    MPX_DEBUG1("CVcxMyVideosActiveTask::DoCancel() start");
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    // Callback and cleanup
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    iObserver.HandleOperationCompleted( KErrCancel );
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    delete iCurCommand;
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    iCurCommand = NULL;
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    iStopped = EFalse;
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    MPX_DEBUG1("CVcxMyVideosActiveTask::DoCancel() exit");
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    }
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// ---------------------------------------------------------------------------
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// From CActive
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// ---------------------------------------------------------------------------
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//
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TInt CVcxMyVideosActiveTask::RunError( TInt aError )
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    {
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    MPX_DEBUG1("CVcxMyVideosActiveTask::RunError() start");
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    // Callback and cleanup
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    iObserver.HandleOperationCompleted( aError );
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    delete iCurCommand;
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    iCurCommand = NULL;
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    iStopped = EFalse;
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    MPX_DEBUG1("CVcxMyVideosActiveTask::RunError() exit");
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    return KErrNone;
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    }
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// END OF FILE