diff -r 000000000000 -r e6b17d312c8b imservices/instantmessagingcache/imcacheclient/inc/mimcacheclient.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imservices/instantmessagingcache/imcacheclient/inc/mimcacheclient.h	Thu Dec 17 08:54:49 2009 +0200
@@ -0,0 +1,75 @@
+/*
+* Copyright (c) 2008 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:  message change observer
+*
+*/
+
+
+
+#ifndef __MIMCACHECLIENT_H
+#define __MIMCACHECLIENT_H
+
+#include <e32std.h>
+#include <imcachedefs.h>
+
+/**
+ * An interface through which client gets information
+ * about available  data updates.
+ *
+ * @since
+ */
+class MIMCacheClient
+    {
+    public:
+    
+    	
+		/**
+    	* Registeres the cache update observer to server
+    	* @param aStatus status message to regisetr
+		* @param aRight, operations
+    	*/
+        virtual void RegisterObserverToServerL( TRequestStatus& aStatus, EIMCacheOperations aRight ) = 0;
+        
+        /**
+    	* unRegisteres the cache update  observer to server
+    	* @param aStatus status message to regisetr
+		* @param aRight, operations
+    	*/
+        virtual void UnRegisterObserverToServerL( TRequestStatus& aStatus, EIMCacheOperations aRight ) = 0 ;
+              
+        /**
+        * Gets called when data update is available.
+        * Client can then decide wether to use the old one
+        * @param aRight, operations
+        * @param abuuferptr 
+        */
+        virtual TPtr8 GetBufferedDataL(EIMCacheOperations aOperationType ) = 0 ;
+        
+        /**
+         * cancels any outstanding requests pending from the server
+         * @param aStatus status message to regisetr
+         * @param aRight,right is operations
+         */
+        virtual void CancelRequestL( TRequestStatus& aStatus, EIMCacheOperations aRight) = 0;
+         
+protected:
+    	/**
+    	* Destructor
+    	*/
+    	virtual ~MIMCacheClient() {};
+    };
+
+#endif //__MIMCACHECLIENT_H
+
+