// Copyright (c) 2002-2009 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:

 //

 #ifndef __LOGSERVCACHECONFIG_H__

 #define __LOGSERVCACHECONFIG_H__

 #include <logcli.h>

 // Classes referenced

 class MLogServDatabaseTransactionInterface;

 /**

 Caches a copy of the LogEng configuration data (a TLogConfig instance).

 Provides public methods for retrieving/updating the configuration data.

 if the configuration data is updated in a transaction, the changes will be committed/rolled back

 when the transaction is committed/rolled back.  

 Note: the LogEng configuration is kept in a database table with name "Config".

 @see TLogConfig

 @see MLogServDatabaseTransactionInterface

 @internalComponent

 */

 class CLogServCacheConfig : public CBase

 	{

 public:

 	static CLogServCacheConfig* NewL(MLogServDatabaseTransactionInterface& aDatabase);

 	~CLogServCacheConfig();

 	const TLogConfig& Config() const;

 	void UpdateL(const TLogConfig& aConfig);

 #ifdef _DEBUG    

 	inline TBool InTransaction() const;

 #endif   

 	void Commit();

 	inline void Rollback();

 private:

 	CLogServCacheConfig(MLogServDatabaseTransactionInterface& aDatabase);

 	void ConstructL();

 	void ReadL();

 private:

 	MLogServDatabaseTransactionInterface& iDatabase;

 	TLogConfig  iConfig;//The last good configuration value. Essentially, the current configuration

 	TLogConfig  iRequestedConfiguration;//The requested configuration

 	TBool       iInTransaction;//Indicates whether the configuration cache is currently within an update transaction

 	};

 #ifdef _DEBUG    

 /**

 Indicates whether a configuration transaction has begun

 */

 inline TBool CLogServCacheConfig::InTransaction() const

     {

     return iInTransaction;

     }

 #endif//_DEBUG

 /**

 Roll back a configuration transaction

 */

 inline void CLogServCacheConfig::Rollback()

     {

     // Nothing really to do here other than discard the transaction status

     // (ready to start over again).

     iInTransaction = EFalse;

     }

 #endif