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// Copyright (c) 2008-2010 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 SQLCOMPACTTIMER_H
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#define SQLCOMPACTTIMER_H
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#include <e32base.h>
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//Forward declarations
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class CSqlCompactTestActive;
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class CSqlCompactEntry;
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#ifdef _DEBUG
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#define SQLCOMPACTTIMER_INVARIANT() Invariant()
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#else
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#define SQLCOMPACTTIMER_INVARIANT() void(0)
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#endif
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/**
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A CTimer derived class that performs the background compaction.
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The CSqlCompactTimer class maintains a queue of CSqlCompactEntry objects waiting to be compacted
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(the databases).
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The class offers methods for adding/removing CSqlCompactEntry objects to/from the queue and a Restart()
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method that can be used to delay the next compaction step, improving this way the SQL server responsiveness to
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client requests.
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The CSqlCompactEntry objects needing compaction will be added at the front of the queue.
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Every time when timer's RunL() method gets executed, the last element from the queue will be picked-up and one
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compaction step will be performed. When the CSqlCompactEntry object completes the compaction, it will remove
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itself from the queue.
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@see CSqlCompactEntry
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlCompactTimer) : protected CTimer
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{
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friend class CSqlCompactTestActive;
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public:
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static CSqlCompactTimer* NewL(TInt aIntervalMs);
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virtual ~CSqlCompactTimer();
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void Restart();
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void Queue(CSqlCompactEntry& aEntry);
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void DeQueue(CSqlCompactEntry& aEntry);
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void Invariant() const;
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private:
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CSqlCompactTimer(TInt aIntervalMs);
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void ConstructL();
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virtual void RunL();
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private:
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TInt iIntervalMicroSec;
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TSglQue<CSqlCompactEntry> iQueue;
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};
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#endif//SQLCOMPACTTIMER_H
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