diff -r 000000000000 -r c6b0df440bee dbgagents/trkagent/engine/TrkUsbConnectionListener.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dbgagents/trkagent/engine/TrkUsbConnectionListener.h	Tue Mar 02 10:33:16 2010 +0530
@@ -0,0 +1,42 @@
+/*
+* 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: 
+*
+*/
+
+
+#ifndef TRKUSBCONNECTIONLISTENER_H_
+#define TRKUSBCONNECTIONLISTENER_H_
+
+/**
+*  Abstract callback interface for port listeners to call into the debug manager for certain situations.
+*/
+class MTrkUsbConnectionListener
+{
+    public:
+
+        /**
+        * Called by the port listeners when a connection is available
+        */
+        virtual void ConnectionAvailable() = 0;
+
+        /**
+        * This is called when a connection is closed, this can happen for different reasons.
+        * One of the reasons could be that the user has unplugged 
+        * the USB cable when using the USB connection
+        */
+        virtual void ConnectionUnAvailable() = 0; 
+            
+};
+#endif /* TRKUSBCONNECTIONLISTENER_H_ */