--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wvuing/wvlogger/Src/MCALoggerWriteObserver.h	Thu Dec 17 08:41:52 2009 +0200
@@ -0,0 +1,86 @@
+/*
+* Copyright (c) 2003 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:  Channel for writer to inform about state changes to observer
+*
+*/
+
+
+#ifndef __MCALOGGERWRITEOBSERVER_H__
+#define __MCALOGGERWRITEOBSERVER_H__
+
+//INCLUDES
+
+#include "PrivateDefinitions.h"
+
+//	FORWARD CLASS DECLERATIONS
+
+class MCALoggerMessageHeader;
+class MCALoggerWriteInterface;
+
+// CLASS DECLARATION
+
+/**
+ *  Channel for writer to inform about state changes to observer
+ *
+ *  @lib CALogger.dll
+ *  @since 2.1
+ */
+class MCALoggerWriteObserver
+    {
+    public: //Type definitions
+
+
+    public: // Interface
+
+        /**
+         *	Add file to write buffer. Ownership of iFile transfered to observer
+         *	@since 2.1
+         *	@param iFile File information
+         */
+        virtual void AddFileL( TFileRelation aFile ) = 0;
+
+        /**
+         *	Remove file from write buffer.
+         *	@since 2.1
+         *	@param aWriter File to be removed is recognized with file writer pointer.
+         */
+        virtual void RemoveFileL( MCALoggerWriteInterface& aWriter ) = 0;
+
+        /**
+         *	Creates new filename for writer. Ownership is transfered to caller.
+         *	@since 2.1
+         *	@return Pointer to new filename.
+         */
+        virtual HBufC* CreateNewFilenameL() = 0;
+
+        /**
+         *	Checks memory situation. Check if there is enough memory to write
+         *	file.
+         *	@since 2.1
+         *	@param aMemoryRequired Memory required in bytes.
+         *	@return ETrue if there is enough memory and EFalse if not.
+         */
+        virtual TBool CheckMemoryL( TInt aMemoryRequired ) = 0;
+
+    protected:
+
+        /**
+         * Destructor.
+         */
+        virtual ~MCALoggerWriteObserver() {};
+    };
+
+#endif      // __MCALOGGERWRITEOBSERVER_H__
+
+// End of File