1 /*

     2 * Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  ?Description

    15 *

    16 */

    17 

    18 

    19 #include "ircachecleanup.h"

    20 #include "ircachemgmt.h"

    21 #include "irdebug.h"

    22 

    23 //Constant decided on the rate of data collection in cache 

    24 /*in a high speed connection*/

    25 /* const TUint KConstantForCleanupFrequency = KCacheLimitSize*90; */

    26 //maximum time interval = 2147483648/KCacheLimitSize   

    27 

    28 const TUint KIntervalPerByte =2048 ;

    29 //

    30 const TInt KMinCleanupInterval = 2*60*1000000;//2 mins

    31 const TInt KMaxCleanupInterval = 2147483647;//~36 mins for 1MB data

    32 

    33 // ---------------------------------------------------------------------------

    34 //Two-phased constructor.

    35 // ---------------------------------------------------------------------------

    36 //

    37 CIRCacheCleanup* CIRCacheCleanup::NewL(CIRCacheMgmt& aCacheDb)

    38     {

    39     IRLOG_DEBUG( "CIRCacheCleanup::NewL - Entering" );

    40     CIRCacheCleanup* self = new(ELeave)CIRCacheCleanup(aCacheDb);

    41     CleanupStack::PushL(self);

    42     self->ConstructL();

    43     CleanupStack::Pop(self);

    44     IRLOG_DEBUG( "CIRCacheCleanup::NewL - Exiting" );

    45     return self;

    46     }

    47 

    48 // ---------------------------------------------------------------------------

    49 // Destructor.

    50 // ---------------------------------------------------------------------------

    51 //

    52 CIRCacheCleanup::~CIRCacheCleanup()

    53     {

    54     IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Entering" );

    55     Cancel();

    56     IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Exiting" );

    57     }

    58 

    59 // ---------------------------------------------------------------------------

    60 //Default Constructor

    61 // ---------------------------------------------------------------------------

    62 //

    63 CIRCacheCleanup::CIRCacheCleanup(CIRCacheMgmt& aCacheDb):

    64     CTimer( CActive::EPriorityLow ), iDatabase( aCacheDb )

    65     {

    66     IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Entering" );

    67     CActiveScheduler::Add( this );

    68     IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Exiting" );

    69     }

    70 

    71 // ---------------------------------------------------------------------------

    72 //Second-phase constructor.

    73 // ---------------------------------------------------------------------------

    74 //

    75 void CIRCacheCleanup::ConstructL()

    76     {

    77     IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Entering" );

    78     CTimer::ConstructL();   

    79     CheckStatusL();

    80     IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Exiting" );

    81     }

    82 

    83 // ---------------------------------------------------------------------------

    84 //Cleanup CacheDb if necessary

    85 // ---------------------------------------------------------------------------

    86 //

    87 void CIRCacheCleanup::CleanupCacheDbL()

    88     {

    89     IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Entering" );

    90     iDatabase.CheckSizeL();

    91     IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Exiting" );

    92     }

    93     

    94 // ---------------------------------------------------------------------------

    95 //CheckStatus of CacheDb and do cleanup if necessary

    96 // ---------------------------------------------------------------------------

    97 //

    98 void CIRCacheCleanup::CheckStatusL()

    99     {

   100     IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Entering" );

   101     TTimeIntervalMicroSeconds32  interval(GetCleanupInterval());

   102     After(interval);

   103     CleanupCacheDbL();

   104     IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Exiting" );

   105     }

   106     

   107 // ---------------------------------------------------------------------------

   108 //  CIRCacheCleanup::RunL().

   109 // ---------------------------------------------------------------------------

   110 //

   111 void CIRCacheCleanup::RunL()

   112      {

   113      IRLOG_DEBUG( "CIRCacheCleanup::RunL - Entering" );

   114      CheckStatusL();

   115      IRLOG_DEBUG( "CIRCacheCleanup::RunL - Exiting" );

   116      }

   117       

   118 // ---------------------------------------------------------------------------

   119 //  CIRCacheCleanup::GetCleanupInterval().

   120 // ---------------------------------------------------------------------------

   121 //

   122 TUint32 CIRCacheCleanup::GetCleanupInterval()

   123     {

   124     IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Entering" );

   125     //formula derivation:

   126     //Timeinterval of cleanup (T) is inversely proportional to the cache size(S)

   127     //Minimum time interval for cleanup routine 2 min.

   128     //Maximum time interval for cleanup routine ~35mins.

   129     //timeintervalperbyte = (35-2)*60*1000000/1024*1024

   130     //TimeInterval = timeintervalperbyte*(MaxCacheLimit-CurrentCachesize)

   131     

   132     TInt interval =KIntervalPerByte * (KCacheLimitSize - iDatabase.CacheSize());

   133     //keep the value range bound

   134     interval = Max(interval,KMinCleanupInterval);

   135     interval = Min(interval,KMaxCleanupInterval);

   136     IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Exiting" );

   137     return interval;

   138     }