--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericservices/activebackupclient/inc/abachandler.h	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,110 @@
+/**
+* Copyright (c) 2004-2009 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:
+* Declaration of CActiveBackupCallbackHandler
+* 
+*
+*/
+
+
+
+/**
+ @file
+*/
+#ifndef __ACTIVEBACKUPCALLBACKHANDLER_H__
+#define __ACTIVEBACKUPCALLBACKHANDLER_H__
+
+#include <e32base.h>
+#include <connect/abclient.h>
+#include <connect/abclientserver.h>
+
+namespace conn
+	{ 
+	class MActiveBackupDataClient;
+	class RABClientSession;
+	
+	class CActiveBackupCallbackHandler : public CActive
+		/**
+		CActiveBackupCallbackHandler is used to handle the asynchronous calls back from the
+		active backup server. IPC only allows client initiated message transfer and hence the 
+		Active Backup Callback Handler must prime the server with an initial message and use 
+		the async response to "send" a message to the client side.
+		
+		@internal component
+		*/
+		{
+	public:
+
+		/** 
+		Empty virtual destructor to avoid memory leaks
+		*/
+		virtual ~CActiveBackupCallbackHandler();
+		
+		static CActiveBackupCallbackHandler* NewL(MActiveBackupDataClient* aABDC, 
+			RABClientSession& aClientSession);
+		
+		/**
+		RunL will synchronously call the callback implementation passed in to this object
+		*/
+		void RunL();
+		
+		/**
+		*/
+		void DoCancel();
+		
+		/**
+		RunError implementation should send the leave code to the ABServer for propagation back 
+		to the SBEngine client. This enables any leaves from the callbacks to be returned to the 
+		PC for display/handling by the user
+		
+		@return any unhandled error code
+		*/
+		TInt RunError(TInt aError);
+		
+		void ConstructL();
+		
+		void StartListeningForServerMessagesL();
+	
+	private:
+		CActiveBackupCallbackHandler(MActiveBackupDataClient* aABDC, RABClientSession& aClientSession);
+		void PrimeServerForCallbackL();
+		void PrimeServerForCallbackWithResponseL(TInt aResponse);
+		void PrimeServerForCallbackWithResponseL(TDesC8& aResponse);
+		TPtr8 CreateFixedBufferL();
+			
+	private:
+		/** Callback mixin implementation provided by the active backup client */
+		MActiveBackupDataClient* iActiveBackupDataClient;
+		
+		/** The client session to call methods on */
+		RABClientSession& iClientSession;
+
+		/** This modifiable package buf is set by the Server to define which callback should 
+		be called on the client */
+		TPckgBuf<TABCallbackCommands> iCallbackCommand;
+		
+		/** Modifiable package buf containing the first of a maximum of two arguments for the callback */
+		TPckgBuf<TInt> iCallbackArg1;
+
+		/** Modifiable package buf containing the second of a maximum of two arguments for the callback */
+		TPckgBuf<TInt> iCallbackArg2;
+		
+		/** Buffer for holding transferred data from server */
+		HBufC8* iTransferBuffer;
+		};
+
+	} // end namespace
+
+#endif // __ACTIVEBACKUPCALLBACKHANDLER_H__
+