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// Copyright (c) 2002-2009 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:
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//
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#ifndef __LOGSERVDATABASECHANGETRACKER_H__
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#define __LOGSERVDATABASECHANGETRACKER_H__
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#include <d32dbms.h>
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#include "LogServBackupObserver.h"
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#include "LogServDatabaseChangeInterface.h"
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#include "LogServDatabaseChangeDefinition.h"
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// Classes referenced
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class CLogChangeDefinition;
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class MLogServBackupInterface;
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class MLogServDatabaseTransactionInterface;
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/////////////////////////////////////////////////////////////////////////////////////////
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// -----> CLogServDatabaseChangeTracker (header)
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/////////////////////////////////////////////////////////////////////////////////////////
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/**
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@internalComponent
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*/
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class CLogServDatabaseChangeTracker : public CActive, public MLogServBackupObserver, public MLogServDatabaseChangeInterface
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{
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/////////////////////////////////////////////////////////////////////////////////////////
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public:
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/////////////////////////////////////////////////////////////////////////////////////////
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static CLogServDatabaseChangeTracker* NewL(MLogServDatabaseTransactionInterface& aDatabase, MLogServBackupInterface& aBackupInterface, TInt aPriority);
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~CLogServDatabaseChangeTracker();
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // INTERNAL CONSTRUCT
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/////////////////////////////////////////////////////////////////////////////////////////
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CLogServDatabaseChangeTracker(MLogServDatabaseTransactionInterface& aDatabase, MLogServBackupInterface& aBackupInterface, TInt aPriority);
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void ConstructL();
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // FROM MLogServDatabaseChangeInterface
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/////////////////////////////////////////////////////////////////////////////////////////
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void DCISubmitChangedEventContextL(TLogDatabaseChangeType aType, TLogId aEventId);
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void DCISubmitGlobalChangeContextL(TUid aChangeType, TInt aContextParam1, TInt aContextParam2, TInt aContextParam3);
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//
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void DCIRequestChangeNotificationsL(MLogServDatabaseChangeObserver& aObserver);
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void DCIRequestChangeNotificationsCancel(MLogServDatabaseChangeObserver& aObserver);
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // FROM MLogServBackupObserver
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/////////////////////////////////////////////////////////////////////////////////////////
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void BOHandleEventL(TLogServBackupEvent aEvent);
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // FROM CActive
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/////////////////////////////////////////////////////////////////////////////////////////
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void RunL();
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void DoCancel();
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TInt RunError(TInt aError);
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // INTERNAL METHODS
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/////////////////////////////////////////////////////////////////////////////////////////
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void Request();
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void NotifyObserversL();
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void NotifyGlobalChangeEventsL();
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static TBool IdleNotifyGlobalChangeEvents(TAny* aSelf);
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/////////////////////////////////////////////////////////////////////////////////////////
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private: // MEMBER DATA
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/////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Watches the database for change events
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*/
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MLogServDatabaseTransactionInterface& iDatabase;
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/**
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* Watches the database for change events
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*/
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MLogServBackupInterface& iBackupInterface;
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/**
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* Watches the database for change events
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*/
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RDbNotifier iNotifier;
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/**
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* Observers
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*/
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RPointerArray<MLogServDatabaseChangeObserver> iObservers;
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/**
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* Track changes
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*/
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CLogChangeDefinition* iChanges;
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/**
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* Used to ensure any global changes are pushed to clients
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* only after all other active object operations are complete.
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*/
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CIdle* iIdler;
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/**
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* A queue of global change events
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*/
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RArray<TLogServDatabaseChangeDefinition> iGlobalChanges;
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};
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#endif
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