diff -r 000000000000 -r 5e5d6b214f4f instantmessagesalert/src/cimalertpropertyobserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/instantmessagesalert/src/cimalertpropertyobserver.cpp	Tue Feb 02 10:12:18 2010 +0200
@@ -0,0 +1,140 @@
+/*
+* Copyright (c) 2009 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:  Publish & Subscribe property change observer implementation
+*
+*/ 
+
+// INCLUDE FILES
+#include "cimalertpropertyobserver.h"
+#include "mimalertpropertynotificationobserver.h"
+
+#include <bautils.h>
+#include <barsc.h>
+#include <e32property.h>
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::CIMAlertPropertyObserver
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CIMAlertPropertyObserver::CIMAlertPropertyObserver( 
+        MIMAlertPropertyNotificationObserver& aObserver )
+    : CActive( CActive::EPriorityLow ),
+      iObserver( aObserver )
+    {
+    CActiveScheduler::Add( this );
+    }
+
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CIMAlertPropertyObserver* CIMAlertPropertyObserver::NewL( 
+        MIMAlertPropertyNotificationObserver& aObserver )
+    {
+    CIMAlertPropertyObserver* self = new( ELeave ) CIMAlertPropertyObserver( aObserver );
+    return self;
+    }
+
+
+// Destructor
+CIMAlertPropertyObserver::~CIMAlertPropertyObserver()
+    {
+    if( IsActive() )
+        {
+        Cancel();
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::ObservePropertyChangeL
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CIMAlertPropertyObserver::ObservePropertyChangeL( TUid aCategory, TUint aKey )
+    {
+	if( IsActive() )
+		{
+		return;
+		}
+    User::LeaveIfError( iProperty.Attach( aCategory, aKey ) );
+	iKey = aKey;
+	iCategory = aCategory;
+    iProperty.Subscribe( iStatus );
+    SetActive();
+    }
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::CancelObserve
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CIMAlertPropertyObserver::CancelObserve()
+    {
+    if( IsActive() )
+        {
+        Cancel();
+        }
+	}
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::RunL
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CIMAlertPropertyObserver::RunL()
+    {
+	iProperty.Subscribe( iStatus );
+	SetActive();
+    iObserver.HandlePropertyNotificationEventL( iCategory, iKey );      
+    }
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::DoCancel
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CIMAlertPropertyObserver::DoCancel()
+    {
+    iProperty.Cancel();
+    }
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::Category
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TUid CIMAlertPropertyObserver::Category()
+	{
+	return iCategory;
+	}
+
+// -----------------------------------------------------------------------------
+// CIMAlertPropertyObserver::Key
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+TUint CIMAlertPropertyObserver::Key()
+	{
+	return iKey;
+	}
+
+//  End of File