--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/server/inc/mdsdiskspacenotifier.h	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,160 @@
+/*
+* Copyright (c) 2007-2009 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:  This is disk space notifier for Metadata server.*
+*/
+
+#ifndef __MDSDISKSPACENOTIFIER_H__
+#define __MDSDISKSPACENOTIFIER_H__
+
+// INCLUDE FILES
+#include <e32base.h>
+#include <f32file.h>
+
+/**
+* MMdSDiskSpaceNotifierObserver
+* Observer interface for a disk space notifier.
+*/
+class MMdSDiskSpaceNotifierObserver
+	{
+	public :
+		enum TDiskSpaceDirection
+			{
+			/** Disk space is larger than threshold level */
+			EMore,
+
+			/** Disk space is smaller than threshold level */
+			ELess
+			};
+
+		/**
+		 * Called to notify the observer that disk space has crossed the specified threshold value.
+		 *
+		 * @param aCrossDirection threshold cross direction
+		 */
+		virtual void HandleDiskSpaceNotificationL(TDiskSpaceDirection aDiskSpaceDirection) = 0;
+
+		/**
+		 * Called to if disk space notifier has an error situation.
+		 *
+		 * @param aError error code
+		 */
+		virtual void HandleDiskSpaceError(TInt aError) = 0;
+	};
+
+/**
+* CMSDiskSpaceNotifierAO.
+* A disk space notifier class
+*/
+class CMdSDiskSpaceNotifierAO : public CActive
+    {
+    public:
+    	enum TDiskSpaceNotifierState
+    		{
+    		ENormal,
+    		EIterate
+    		};
+
+    public : // Constructors and destructors
+	    /**
+	     * Constructs a disk space notifier implementation.
+	     *
+	     * @param aThreshold minimum free disk space threshold level in bytes
+	     * @param aFilename filename which defines monitored drive's number
+	     * @return  metadata server implementation
+	     */
+        static CMdSDiskSpaceNotifierAO* NewL(
+        	MMdSDiskSpaceNotifierObserver& aObserver, 
+        	TInt64 aThreshold, const TDesC& aFilename);
+
+	    /**
+	     * Constructs a disk space notifier implementation and leaves it
+	     * in the cleanup stack.
+	     *
+	     * @param aThreshold minimum free disk space threshold level in bytes
+	     * @param aFilename filename which defines monitored drive's number
+	     * @return  metadata server implementation
+	     */
+        static CMdSDiskSpaceNotifierAO* NewLC(        
+        	MMdSDiskSpaceNotifierObserver& aObserver, 
+        	TInt64 aThreshold, const TDesC& aFilename);
+
+	    /**
+	    * Destructor.
+	    */
+        virtual ~CMdSDiskSpaceNotifierAO();
+
+        TBool DiskFull() const;
+
+    protected: // Functions from base classes
+        /**
+         * From CActive
+         * Callback function.
+         * Invoked to handle responses from the server.
+         */
+        void RunL();
+
+        /**
+         * From CActive
+         * Handles errors that occur during notifying the observer.
+         */
+        TInt RunError(TInt aError);
+
+        /**
+         * From CActive
+         * Cancels any outstanding operation.
+         */
+        void DoCancel();
+
+    private: // Constructors and destructors
+
+        /**
+         * constructor
+         */
+        CMdSDiskSpaceNotifierAO(
+        	MMdSDiskSpaceNotifierObserver& aObserver,
+        	TInt64 aThreshold, TDriveNumber aDrive);
+
+        /**
+         * 2nd phase constructor
+	     * @param aThreshold minimum free disk space threshold level in bytes
+	     * @param aDrive monitored drive's number
+         */
+        void ConstructL();
+
+    private: // New methods
+
+		void StartNotifier();
+
+		static TDriveNumber GetDriveNumberL( const TDesC& aFilename );
+
+    private: // Data
+
+        MMdSDiskSpaceNotifierObserver& iObserver;
+        
+        RFs iFileServerSession;
+        
+        const TInt64 iThreshold;
+        
+        const TDriveNumber iDrive;
+        
+        TDiskSpaceNotifierState iState;
+        
+        TInt iIterationCount;
+        
+        TBool iDiskFull;
+    };
+
+#endif // __CMDSSERVER_H__
+
+// End of File