/*

* Copyright (c) 2006-2007 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:  Base class for thumbnail server tasks

 *

*/

#include <e32base.h>

#include <fbs.h>

#include "thumbnailtask.h"

#include "thumbnailtaskprocessor.h"

#include "thumbnailprovider.h"

#include "thumbnaillog.h"

#include "thumbnailpanic.h"

#include "thumbnailserversession.h"  // ConvertSqlErrToE32Err()

#include "thumbnailmanagerconstants.h"

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// CThumbnailTask::CThumbnailTask()

// C++ default constructor can NOT contain any code, that might leave.

// ---------------------------------------------------------------------------

//

CThumbnailTask::CThumbnailTask( CThumbnailTaskProcessor& aProcessor, TInt

    aPriority ): CActive( EPriorityStandard ), iProcessor( aProcessor ),

    iPriority( aPriority ), iState( EIdle )

    {

    TN_DEBUG2( "CThumbnailTask(0x%08x)::CThumbnailTask()", this);

    CActiveScheduler::Add( this );

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::~CThumbnailTask()

// Destructor.

// ---------------------------------------------------------------------------

//

CThumbnailTask::~CThumbnailTask()

    {

    Cancel();

    CancelMessage();

    iClientThread.Close();

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::Priority()

// Returns priority of task.

// ---------------------------------------------------------------------------

//

TInt CThumbnailTask::Priority()const

    {

    return iPriority;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::State()

// Returns state of task.

// ---------------------------------------------------------------------------

//

CThumbnailTask::TTaskState CThumbnailTask::State()const

    {

    return iState;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::StartL()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::StartL()

    {

    TN_DEBUG3( "CThumbnailTask(0x%08x)::StartL() iState == %d ", this, iState );

    __ASSERT_DEBUG(( iState != ERunning ), ThumbnailPanic( EThumbnailAlreadyRunning ));

    iState = ERunning;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::DoCancel()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::DoCancel()

    {

    // No implementation required

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::Complete()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::Complete( TInt aReason )

    {

    TN_DEBUG4( "CThumbnailTask(0x%08x)::Complete(aReason=%d) iState was %d",

        this, aReason, iState );

    if ( iState != EComplete )

        {

        iState = EComplete;

        if ( ClientThreadAlive() )

            {

            if( iMessage.Identity() == KDaemonUid ) 

                {

                iProcessor.SetDaemonAsProcess(ETrue);

                }

            else

                {

                iProcessor.SetDaemonAsProcess(EFalse);

                }

            iMessage.Complete( CThumbnailServerSession::ConvertSqlErrToE32Err( aReason ));

            }

        ResetMessageData();

        iProcessor.TaskComplete( this );

        }

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::Continue()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::Continue()

    {

    if ( iState != EComplete )

        { 

        iState = EIdle;

        }

    iProcessor.TaskComplete( this );

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::StartError()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::StartError( TInt aError )

    {

    // This is called if StartL() left. Complete this task with an error and

    // continue processing.

    TN_DEBUG3( "CThumbnailTask(0x%08x)::StartError(aError=%d)", this, aError );

    Complete( aError );

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::ChangeTaskPriority()

// Changes priority of the task.

// ---------------------------------------------------------------------------

//

void CThumbnailTask::ChangeTaskPriority( TInt aNewPriority )

    {

    iPriority = aNewPriority;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::SetMessageData()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::SetMessageData( const TThumbnailServerRequestId&

    aRequestId, const RMessage2& aMessage, const RThread& aClientThread )

    {

    iMessage = aMessage;

    iRequestId = aRequestId;

    if ( iMessage.Handle())

        {

        // copy client thread handle

        iClientThread.Duplicate(aClientThread);

        }

    else

        {

        TN_DEBUG2( "CThumbnailTask(0x%08x)::ClientThreadAlive() - message null", this);

        }

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::SetMessageData()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::SetMessageData( const TThumbnailServerRequestId&

    aRequestId )

    {

    iMessage = RMessage2();

    iRequestId = aRequestId;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::ResetMessageData()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::ResetMessageData()

    {

    iMessage = RMessage2();

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::ResetMessageData()

// Returns id of specific task.

// ---------------------------------------------------------------------------

//

TThumbnailServerRequestId CThumbnailTask::RequestId()const

    {

    return iRequestId;

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::CancelMessage()

// ---------------------------------------------------------------------------

//

void CThumbnailTask::CancelMessage()

    {

    if ( ClientThreadAlive() )

        {

        iMessage.Complete( KErrCancel );

        }

    ResetMessageData();

    }

// ---------------------------------------------------------------------------

// CThumbnailTask::ClientThreadAlive()

// Checks if client thread is still alive and RMessage2 handle valid.

// ---------------------------------------------------------------------------

//

TBool CThumbnailTask::ClientThreadAlive(const TBool aGetThread)

    {

    TN_DEBUG1( "CThumbnailTask::ClientThreadAlive()");

    if ( iMessage.Handle())

        {

        if (aGetThread)

            {

            // get client thread

            TInt err = iMessage.Client( iClientThread );

            if (err != KErrNone)

                {

                TN_DEBUG2( "CThumbnailTask(0x%08x)::ClientThreadAlive() - client thread not found", this);

                ResetMessageData();

                return EFalse;

                }

            }

        // check if client thread alive

        TExitType exitType = iClientThread.ExitType();

        if( exitType != EExitPending )

            {

            TN_DEBUG2( "CThumbnailTask(0x%08x)::ClientThreadAlive() - client thread died", this);

            ResetMessageData();

            return EFalse;

            }

        else

            {

            // all OK

            return ETrue;

            }

        }

    else

        {

        return EFalse;

        }

    }

// End of file