harvester/server/src/restorewatcher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 26 Jan 2010 12:13:20 +0200
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/*
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This implements CRestoreWatcher class.
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*
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*/
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// SYSTEM INCLUDE
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#include <centralrepository.h>
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#include <sbdefs.h>
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#include <driveinfo.h>
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#include <pathinfo.h>
0
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// USER INCLUDE
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#include "restorewatcher.h"
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#include "harvesterlog.h"
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#include "propertywatcher.h"
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#include "clientkeywatcherkeys.h"
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// STATIC MEMBERS
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TInt CRestoreWatcher::iRegisteredClients = 0;
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TBool CRestoreWatcher::iRestoreDone = EFalse;
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::NewL
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// Two-phased constructor.
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// -----------------------------------------------------------------------------
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//
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CRestoreWatcher* CRestoreWatcher::NewL()
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	{
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	WRITELOG("CRestoreWatcher* CRestoreWatcher::NewL()");
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	CRestoreWatcher* self = new (ELeave) CRestoreWatcher();
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	CleanupStack::PushL( self );
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	self->ConstructL();
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	CleanupStack::Pop( self );
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	return self;
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::CRestoreWatcher
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// Standard C++ constructor.
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// -----------------------------------------------------------------------------
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//
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CRestoreWatcher::CRestoreWatcher() : iPropertyWatcher( NULL ), iClients( 0 )
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	{
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	// No implementation required.
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::~CRestoreWatcher
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// Standard C++ destructor.
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// -----------------------------------------------------------------------------
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//
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CRestoreWatcher::~CRestoreWatcher()
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	{
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	if( iPropertyWatcher )
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		{
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		iPropertyWatcher->StopListeningKeyChanges( 
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				KUidSystemCategory,
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				conn::KUidBackupRestoreKey, this );
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		iPropertyWatcher->StopListeningKeyChanges( 
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				KPSRestoreWatcherCategory,
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				KPSRestoreWatcherClientsKey, this );
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		iPropertyWatcher->Delete(); // Release connection to TLS object.
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		}
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::ConstructL
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// Symbian 2nd phase constructor.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::ConstructL()
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	{
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	WRITELOG("CRestoreWatcher::ConstructL()");
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	CreateFileNameL();
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	CheckRestoreL();
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    WRITELOG1("CRestoreWatcher::ConstructL() - iRestoreDone: %d", iRestoreDone );
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	WRITELOG("CRestoreWatcher::ConstructL() - creating restore watcher PS key");
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	RProperty clientsProperty;
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    const TInt error = clientsProperty.Define(
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    		KPSRestoreWatcherCategory, 
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			KPSRestoreWatcherClientsKey,
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			RProperty::EInt );
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    clientsProperty.Close();
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	if( error != KErrAlreadyExists ) // KErrAlreadyExists not error.
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		{
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		User::LeaveIfError( error );
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		}
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	iPropertyWatcher = CPropertyWatcher::GetInstanceL();
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	// Want to listen when backup/restore starts.
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	// Calls NotifyKeyL when key's state has changed. 
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	iPropertyWatcher->ListenKeyChangesL( 
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			KUidSystemCategory,
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			conn::KUidBackupRestoreKey, this );
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	// Listen message clients.
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	iPropertyWatcher->ListenKeyChangesL( 
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			KPSRestoreWatcherCategory,
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			KPSRestoreWatcherClientsKey, this );
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	WRITELOG("CRestoreWatcher::ConstructL() ends");
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::CreateFileNameL
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// Filename flag can be changed to use cen rep!
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::CreateFileNameL() 
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	{
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	TInt drive ( 0 );
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	User::LeaveIfError( 
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			DriveInfo::GetDefaultDrive( DriveInfo::EDefaultSystem, drive ) );
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    RFs fsSession;
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    User::LeaveIfError( fsSession.Connect() );
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    TChar driveLetter;
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    fsSession.DriveToChar( drive, driveLetter );
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    iFileName.Append( driveLetter );
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    iFileName.Append( KRestoreFile );  // result-> C:\\private\\200009F5\\restoredone
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    fsSession.Close();
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::NotifyKeyL
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// CPropertyWatcher's callback.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::NotifyKeyL( 
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		const TInt aKeyValue,
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		const TUid aPropertyCategory,
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		const TUint aKey )
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	{
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	WRITELOG("CRestoreWatcher::NotifyKeyL() - begin");
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	if( aPropertyCategory == KUidSystemCategory &&
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			aKey == conn::KUidBackupRestoreKey )
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		{
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		HandleBackupRestoreKeyActionL( aKeyValue );
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		}
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	if( aPropertyCategory == KPSRestoreWatcherCategory &&
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			aKey == KPSRestoreWatcherClientsKey )
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		{
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		HandleClientsKeyActionL( aKeyValue );
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		}
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	WRITELOG("CRestoreWatcher::NotifyKeyL() - end");
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::HandleBackupKeyActionL
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// When user starts restore sets flag on.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::HandleBackupRestoreKeyActionL( const TUint aKeyValue )
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	{	
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	WRITELOG("CRestoreWatcher::HandleBackupKeyActionL() - begin");
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	TInt backupStateValue = aKeyValue;
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	backupStateValue &= conn::KBURPartTypeMask;
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   191
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	if ( backupStateValue == conn::EBURRestoreFull ||
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	     backupStateValue == conn::EBURRestorePartial )
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		{
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		WRITELOG("CRestoreWatcher::RunL() - setting restore to TRUE");
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		SetRestoreFlagL( ETrue );
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		}
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   198
	
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	WRITELOG("CRestoreWatcher::HandleBackupKeyActionL() - end");
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::HandleClientsKeyActionL
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// Handle message clients registering to watcher.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::HandleClientsKeyActionL( const TUint aKeyValue )
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	{	
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	WRITELOG("CRestoreWatcher::HandleBackupKeyActionL() - begin");
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	// aKeyValue contains clients count.
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	if ( aKeyValue < iClients )
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		{
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		WRITELOG("CRestoreWatcher::HandleClientsKeyActionL - unregistering");
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		UnregisterL();
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		}
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	else if ( aKeyValue > iClients )
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		{
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		WRITELOG("CRestoreWatcher::HandleClientsKeyActionL - registering");
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		Register();
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		}
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   222
	
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	iClients = aKeyValue;
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	WRITELOG("CRestoreWatcher::HandleBackupKeyActionL() - end");	
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::Register
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// Registers client to watcher.
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// -----------------------------------------------------------------------------
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//
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TBool CRestoreWatcher::Register()
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	{	
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	WRITELOG("CRestoreWatcher::Register()");
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	if ( iRestoreDone )
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		{
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		WRITELOG("CRestoreWatcher::Register() - partial restore was done.");
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		iRegisteredClients++;
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		WRITELOG1("CRestoreWatcher::Register() - registered clients: %d", iRegisteredClients);
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		}
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	return iRestoreDone;
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::UnregisterL
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// Unregister client to watcher.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::UnregisterL()
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	{
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	WRITELOG("CRestoreWatcher::UnregisterL()");
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	if ( iRegisteredClients <= 0 )
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		{
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		WRITELOG("CRestoreWatcher::UnregisterL() - 0 clients");
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		return;
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		}
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	iRegisteredClients--;
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	WRITELOG1("CRestoreWatcher::UnregisterL() - registered clients: %d", iRegisteredClients);
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	if ( iRegisteredClients == 0 )
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		{
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		WRITELOG("CRestoreWatcher::UnregisterL() - setting CentRep value to 0");
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		SetRestoreFlagL( EFalse );
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		}
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::SetRestoreFlagL
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// Sets restore flag on.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::SetRestoreFlagL( TBool aRestoreDone )
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	{	
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	RFs fs;
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	User::LeaveIfError( fs.Connect() );
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	iRestoreDone = aRestoreDone;
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	if( aRestoreDone )
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		{	
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		RFile64 file;
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		file.Replace( fs, iFileName, EFileWrite );
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		file.Close();
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		}
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	else
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		{
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		fs.Delete( iFileName );
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		}
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	fs.Close();
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	}
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// -----------------------------------------------------------------------------
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// CRestoreWatcher::CheckRestoreL
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// Check if restore has done when booting up harvester server.
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// -----------------------------------------------------------------------------
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//
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void CRestoreWatcher::CheckRestoreL()
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	{
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	RFs fs;
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	RFile64 file;
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	User::LeaveIfError( fs.Connect() );
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	TInt fileError( KErrNotFound );
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	fileError = file.Open( fs, iFileName, EFileRead );
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	file.Close();
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	fs.Close();
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	WRITELOG1("CRestoreWatcher::StartMonitoring - fileError: %d", fileError);
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    if ( fileError == KErrNone )
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    	{
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    	iRestoreDone = ETrue;
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    	}
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    else
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    	{
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    	iRestoreDone = EFalse;
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    	}
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	}
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// End of file.