--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmmanager/cmmgr/cmmserver/inc/cmmtransactionhandler.h	Mon May 03 12:53:07 2010 +0300
@@ -0,0 +1,96 @@
+/*
+* Copyright (c) 2009-2010 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:
+* Implementation of transaction handler.
+*
+*/
+
+
+#ifndef CMMTRANSACTIONHANDLER_H_
+#define CMMTRANSACTIONHANDLER_H_
+
+#include <e32base.h>
+#include <metadatabase.h>
+
+
+/**
+ * Transaction handler.
+ */
+NONSHARABLE_CLASS( CCmmTransactionHandler ) : public CBase
+    {
+public:
+    /**
+     * NewL.
+     * Takes ownership of aDb.
+     */
+    static CCmmTransactionHandler* NewL( CommsDat::CMDBSession& aDb );
+
+    /**
+     * Destructor.
+     * Intentionally not virtual.
+     */
+    ~CCmmTransactionHandler();
+
+private:
+    /**
+     * Constructor.
+     */
+    CCmmTransactionHandler( CommsDat::CMDBSession& aDb );
+
+    /**
+     * Second phase constructor. Leaves on failure.
+     */
+    void ConstructL();
+
+public:
+    /**
+     * Return the CommsDat session.
+     */
+    CommsDat::CMDBSession& Session() const;
+
+    /**
+     * Opens a CommsDat transaction if it is not already open. Reference
+     * counter is inreased by one.
+     */
+    void OpenTransactionLC();
+
+    /**
+     * Decreases the reference counter by one. If it reaches zero, commits the
+     * open CommsDat transaction. If an error code is given as argument, the
+     * CommsDat transaction is rolled back instead.
+     */
+    void CommitTransactionL( TInt aError = KErrNone );
+
+    /**
+     * Performs RollbackTransactionL().
+     */
+    void Close();
+
+    /**
+     * Return the current reference count. Transaction is currently open if the
+     * count above 0.
+     */
+    TUint32 GetReferenceCount();
+
+private:
+    // CommsDat session pointer.
+    CommsDat::CMDBSession& iDb; // Owned.
+
+    // Reference counter.
+    TUint32 iRefCount;
+    };
+
+#endif // CMMTRANSACTIONHANDLER_H_
+
+// End of file