author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Mar 2010 10:00:55 +0200 | |
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parent 0 | 08ec8eefde2f |
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child 17 | 55f2396f6d25 |
permissions | -rw-r--r-- |
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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: |
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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 CSqlCompactTimer objects waiting to be compacted |
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(the databases). |
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The class offers methods for adding/removing CSqlCompactTimer 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 CSqlCompactTimer objects needed compaction will be added at the fromt 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 |