diff -r 84d9eb65b26f -r 518b245aa84c messagingapp/msgappfw/server/src/ccsbackuphandler.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingapp/msgappfw/server/src/ccsbackuphandler.cpp	Fri Jun 25 15:47:40 2010 +0530
@@ -0,0 +1,123 @@
+// Copyright (c) 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:
+//
+#include "ccsbackuphandler.h"
+#include <e32base.h>
+#include <e32property.h>
+#include <connect/sbdefs.h>
+#include "ccsserver.h"
+#include "ccsdebug.h"
+
+_LIT(KDbFileNamePath,"c:\\private\\10281e17\\[2002A542]conversations.db");
+
+
+// ========================== Member Functions ===============================
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::NewL 
+// ----------------------------------------------------------------------------
+CCsBackUpHandler* CCsBackUpHandler::NewL(CCsServer& aServer)
+{
+    PRINT ( _L("Enter CCsBackUpHandler::NewL") );
+    CCsBackUpHandler* self = new (ELeave) CCsBackUpHandler(aServer);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    PRINT ( _L("Exit CCsBackUpHandler::NewL") );
+    return (self);
+    
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::CCsBackUpHandler 
+// ----------------------------------------------------------------------------
+CCsBackUpHandler::CCsBackUpHandler(CCsServer& aServer): iServer(aServer)
+{
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::~CCsBackUpHandler 
+// destructor
+// ----------------------------------------------------------------------------
+CCsBackUpHandler::~CCsBackUpHandler()
+{
+    // Unregister ourselves with backup server
+    if (iBackup) 
+    {
+        iBackup->DeregisterFile(iFileName);
+        delete iBackup;
+    }
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::ConstructL 
+// The 2-phase constructor
+// ----------------------------------------------------------------------------
+void CCsBackUpHandler::ConstructL()
+{
+    PRINT ( _L("Enter CCsBackUpHandler::ConstructL") );
+    iFileName = KDbFileNamePath;
+    // Create backup session
+    iBackup = CBaBackupSessionWrapper::NewL();
+    // Register with the backup server
+    iBackup->RegisterFileL(iFileName, *this);
+    PRINT ( _L("Exit  CCsBackUpHandler::ConstructL 2") );
+    PRINT1 ( _L("KDbFileNamePath: %S"), &iFileName);
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::ChangeFileLockL 
+// Call back from the backup engine observer when a backup/restore is taking place
+// ----------------------------------------------------------------------------
+void CCsBackUpHandler::ChangeFileLockL(const TDesC& aFileAffected, TFileLockFlags aFlags)
+{
+    PRINT1 ( _L("ChangeFileLockL: %d"), aFlags);
+    PRINT1 ( _L("ChangeFileLockL affected file : %S"), &aFileAffected);
+    switch (aFlags) {
+    case ETakeLock:
+    {
+        OpenConversationsDbL();
+        break;
+    }
+    case EReleaseLockNoAccess:    
+    case EReleaseLockReadOnly:
+    {
+        CloseConversationsDbL();
+        break;
+    }
+    default:
+    {
+        __ASSERT_DEBUG(EFalse,User::Invariant());
+        break;
+    }
+    }
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::CloseConversationsDbL 
+// Unloads the plugins, so that the DB handle is closed
+// ----------------------------------------------------------------------------
+void CCsBackUpHandler::CloseConversationsDbL()
+{
+    iServer.DeletePlugins();
+}
+
+// ----------------------------------------------------------------------------
+// CCsBackUpHandler::OpenConversationsDbL 
+// Loads the plugins, so that the DB handle is again opened
+// ----------------------------------------------------------------------------
+void CCsBackUpHandler::OpenConversationsDbL()
+{
+    iServer.LoadPlugins();
+}