/*

* Copyright (c) 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:  

*

*/

#include "catalogsconnectionobserver.h"

#include "catalogsconstants.h"

#include "catalogsengineobserver.h"

#include "catalogsdebug.h"

CCatalogsConnectionObserver* CCatalogsConnectionObserver::NewL( MCatalogsEngineObserver& aObserver )

    {

    DLTRACEIN((""));

    CCatalogsConnectionObserver* self = new (ELeave) CCatalogsConnectionObserver( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

CCatalogsConnectionObserver::~CCatalogsConnectionObserver()

    {

    DLTRACEIN((""));

    Cancel();

    iConnectionEventProperty.Close();

    }

CCatalogsConnectionObserver::CCatalogsConnectionObserver( MCatalogsEngineObserver& aObserver )

    : CActive( EPriorityNormal ), iObserver( aObserver )

    {

    CActiveScheduler::Add( this );

    }

void CCatalogsConnectionObserver::ConstructL()

    {

    DLTRACEIN((""));    

    // Important: this client side process and the server side process 

    // must agree what the key is. The current agreement is that the key is

    // client process SID.

    TUint key = RProcess().SecureId().iId;    

    User::LeaveIfError( iConnectionEventProperty.Attach( KCatalogsEnginePropertyCategory, key ) );

    iConnectionEventProperty.Subscribe( iStatus );

    SetActive();

    }

void CCatalogsConnectionObserver::RunL()

    {

    DLTRACEIN(( "iStatus=%d", iStatus.Int() )); 

    // On error handling: if in any situation request completes with error,

    // we stop further processsing. This is non-critical system, and it doesn't

    // really make sense to build complex error recovery here.

    //

    // Note that when RProperty is deleted on the server side, all subscriptions are completed

    // with KErrNotFound.

    if ( iStatus.Int() != KErrNone )

        {

        return;

        }

    // first subscribe, then get value, otherwise we might miss an update.

    iConnectionEventProperty.Subscribe( iStatus );

    SetActive();

    TBool connectionActive;

    TInt err = iConnectionEventProperty.Get( connectionActive );

    DLINFO(("err = %d", err));        

    if ( err == KErrNone )

        {

        iObserver.CatalogsConnectionEvent( connectionActive );

        }

    else

        {

        // Error occured, something is seriously wrong.

        // Nothing really to do than shut down this subsystem by canceling

        // request.

        DLWARNING(("Error occurred while reading connection event property!"));

        Cancel();

        }

    }

void CCatalogsConnectionObserver::DoCancel()

    {

    DLTRACEIN((""));

    iConnectionEventProperty.Cancel();

    }