--- /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