--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/engine/src/catalogsconnectionobserver.cpp	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,103 @@
+/*
+* 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();
+    }