--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/engine/inc/catalogscommunicable.h	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,84 @@
+/*
+* 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:  
+*
+*/
+
+
+#ifndef C_CATALOGS_COMMUNICABLE_H
+#define C_CATALOGS_COMMUNICABLE_H
+
+#include <e32base.h>
+
+class MCatalogsBaseMessage;
+class MCatalogsSession;
+
+/**
+ *  A class that should be inherited by an object
+ *  receiving messages
+ *
+ *  A server side object that is assigned to receive messages
+ *  should derive from this class. ReceiveMessageL method should
+ *  be implemented to define message handling.
+ *  
+ *
+ *  @lib ?library
+ *  @since S60 ?S60_version *** for example, S60 v3.0
+ */
+class CCatalogsCommunicable : public CObject
+    {
+
+public:
+
+    /**
+     * A function that is called when a message is passed
+     * to an instantiation of an implementing class. The implementation
+     * should define message handling.
+     * NOTICE: This function should return as soon as possible
+     *         so execution of ClientServer can continue freely and new 
+     *         messages are forwarded to receivers using this function.
+     * NOTICE: This function receives ownership of the message and it
+     *         should be released using completion-functions or release-
+     *         function. (Also in error situations)
+     *
+     * @since S60 ?S60_version
+     * @param aMessage message sent
+     * @param aFunctionNumber Number for receiver to use as desired. Usually
+     *                        used to pass the message to correct function in
+     *                        the receiver.
+     */
+    virtual void ReceiveMessage( 
+        MCatalogsBaseMessage* aMessage,
+        TInt aFunctionNumber ) = 0;
+
+    /**
+     * When session has died and a object of this class is still
+     * registered as a message receiver to that session, then this
+     * function is used to inform the object that the session
+     * should not be used anymore.
+     * This means that MCatalogsBaseMessage-typed messages should
+     * not be completed anymore. (Use Release instead.)
+     *
+     * @since S60 ?S60_version
+     * @param aSession Reference to the session that has died.
+     *                 This parameter is given only to identify
+     *                 which session has died. Do not use it.
+     */
+    virtual void CounterPartLost(
+        const MCatalogsSession& aSession ) = 0;
+
+    };
+
+#endif // C_CATALOGS_COMMUNICABLE_H
+