sl@0: // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef __LOGSERVCACHECONFIG_H__
sl@0: #define __LOGSERVCACHECONFIG_H__
sl@0: 
sl@0: #include <logcli.h>
sl@0: 
sl@0: // Classes referenced
sl@0: class MLogServDatabaseTransactionInterface;
sl@0: 
sl@0: /**
sl@0: Caches a copy of the LogEng configuration data (a TLogConfig instance).
sl@0: Provides public methods for retrieving/updating the configuration data.
sl@0: if the configuration data is updated in a transaction, the changes will be committed/rolled back
sl@0: when the transaction is committed/rolled back.  
sl@0: 
sl@0: Note: the LogEng configuration is kept in a database table with name "Config".
sl@0: 
sl@0: @see TLogConfig
sl@0: @see MLogServDatabaseTransactionInterface
sl@0: @internalComponent
sl@0: */
sl@0: class CLogServCacheConfig : public CBase
sl@0: 	{
sl@0: public:
sl@0: 	static CLogServCacheConfig* NewL(MLogServDatabaseTransactionInterface& aDatabase);
sl@0: 	~CLogServCacheConfig();
sl@0: 	const TLogConfig& Config() const;
sl@0: 	void UpdateL(const TLogConfig& aConfig);
sl@0: #ifdef _DEBUG    
sl@0: 	inline TBool InTransaction() const;
sl@0: #endif   
sl@0: 	void Commit();
sl@0: 	inline void Rollback();
sl@0: 
sl@0: private:
sl@0: 	CLogServCacheConfig(MLogServDatabaseTransactionInterface& aDatabase);
sl@0: 	void ConstructL();
sl@0: 	void ReadL();
sl@0: 
sl@0: private:
sl@0: 	MLogServDatabaseTransactionInterface& iDatabase;
sl@0: 	TLogConfig  iConfig;//The last good configuration value. Essentially, the current configuration
sl@0: 	TLogConfig  iRequestedConfiguration;//The requested configuration
sl@0: 	TBool       iInTransaction;//Indicates whether the configuration cache is currently within an update transaction
sl@0: 	
sl@0: 	};
sl@0: 
sl@0: #ifdef _DEBUG    
sl@0: /**
sl@0: Indicates whether a configuration transaction has begun
sl@0: */
sl@0: inline TBool CLogServCacheConfig::InTransaction() const
sl@0:     {
sl@0:     return iInTransaction;
sl@0:     }
sl@0: #endif//_DEBUG
sl@0: 
sl@0: /**
sl@0: Roll back a configuration transaction
sl@0: */
sl@0: inline void CLogServCacheConfig::Rollback()
sl@0:     {
sl@0:     // Nothing really to do here other than discard the transaction status
sl@0:     // (ready to start over again).
sl@0:     iInTransaction = EFalse;
sl@0:     }
sl@0: 
sl@0: #endif