bearermanagement/mpm/src/mpmdatausagewatcher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 14 Apr 2010 16:22:04 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: 201013 Kit: 201015
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/*
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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: Listen cellular data usage key changes in central repository.
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 *
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 */
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#include <e32base.h>
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#include <centralrepository.h>
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#include <cmmanagerkeys.h>
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#include <cmgenconnsettings.h>
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#include "mpmlogger.h"
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#include "mpmserver.h"
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#include "mpmdatausagewatcher.h"
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// ---------------------------------------------------------------------------
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// Default C++ constructor.
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// ---------------------------------------------------------------------------
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//
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CMpmDataUsageWatcher::CMpmDataUsageWatcher( CMPMServer* aServer ) :
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    CActive( EPriorityStandard ), iServer( aServer )
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::CMpmDataUsageWatcher" )
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// Symbian 2nd phase constructor. Creates a central repository object.
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// ---------------------------------------------------------------------------
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//
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void CMpmDataUsageWatcher::ConstructL()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::ConstructL" )
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    iRepository = CRepository::NewL( KCRUidCmManager );
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    }
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// ---------------------------------------------------------------------------
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// Creates a new object by calling the two-phased constructor.
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// ---------------------------------------------------------------------------
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//
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CMpmDataUsageWatcher* CMpmDataUsageWatcher::NewL( CMPMServer* aServer )
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::NewL" )
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    CMpmDataUsageWatcher* self = new( ELeave ) CMpmDataUsageWatcher( aServer );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// Destructor.
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// ---------------------------------------------------------------------------
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//
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CMpmDataUsageWatcher::~CMpmDataUsageWatcher()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::~CMpmDataUsageWatcher" )
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    Cancel();
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    delete iRepository;
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    }
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// ---------------------------------------------------------------------------
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// Order notification from changes.
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// ---------------------------------------------------------------------------
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//
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void CMpmDataUsageWatcher::StartL()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::StartL" )
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    // Get the initial data usage value from repository.
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    User::LeaveIfError( GetCurrentDataUsageValue() );
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    // Request notifications.
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    User::LeaveIfError( RequestNotifications() );
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    }
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// ---------------------------------------------------------------------------
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// From class CActive.
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// Event is received when there is a change in central repository key.
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// ---------------------------------------------------------------------------
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//
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void CMpmDataUsageWatcher::RunL()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::RunL" )
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    if ( iStatus.Int() < KErrNone )
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        {
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        MPMLOGSTRING2("Status: 0x%08X", iStatus.Int())
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        iErrorCounter++;
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        if ( iErrorCounter > KMpmDataUsageWatcherCenRepErrorThreshold )
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            {
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            MPMLOGSTRING2("Over %d consecutive errors, stopping notifications permanently.",
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                    KMpmDataUsageWatcherCenRepErrorThreshold)
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            return;
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            }
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        // Else: Error occured but counter not expired. Proceed.
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        }
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    else
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        {
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        // Notification is received ok => Reset the counter.
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        iErrorCounter = 0;
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        // Get the new Cellular data usage setting value from central repository.
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        TInt oldCellularDataUsage = iCellularDataUsage;
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        if ( GetCurrentDataUsageValue() == KErrNone )
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            {
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            // Stop cellular connections if the setting changes into Disabled.
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            if ( oldCellularDataUsage != ECmCellularDataUsageDisabled &&
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                    iCellularDataUsage == ECmCellularDataUsageDisabled &&
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                    iServer->RoamingWatcher()->RoamingStatus() != EMPMRoamingStatusUnknown )
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                {
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                iServer->StopCellularConns();
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                }
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            }
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        }
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    RequestNotifications();
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    }
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// ---------------------------------------------------------------------------
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// From class CActive.
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// Cancel outstanding request.
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// ---------------------------------------------------------------------------
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//
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void CMpmDataUsageWatcher::DoCancel()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::DoCancel" )
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    iRepository->NotifyCancel( KCurrentCellularDataUsage );
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    }
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17
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// ---------------------------------------------------------------------------
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// Request notifications.
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// ---------------------------------------------------------------------------
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//
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TInt CMpmDataUsageWatcher::RequestNotifications()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::RequestNotifications" )
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    TInt err = iRepository->NotifyRequest( KCurrentCellularDataUsage, iStatus );
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    if ( err == KErrNone )
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        {
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        SetActive();
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        }
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    else
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        {
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        MPMLOGSTRING2( "CMpmDataUsageWatcher::RequestNotifications, ERROR: %d", err )
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        }
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    return err;
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    }
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// ---------------------------------------------------------------------------
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// Get current repository key value.
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// ---------------------------------------------------------------------------
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//
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TInt CMpmDataUsageWatcher::GetCurrentDataUsageValue()
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    {
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    MPMLOGSTRING( "CMpmDataUsageWatcher::GetCurrentDataUsageValue" )
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    TInt err = iRepository->Get( KCurrentCellularDataUsage, iCellularDataUsage );
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    if ( err != KErrNone )
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        {
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        MPMLOGSTRING2( "CMpmDataUsageWatcher::GetCurrentDataUsageValue, ERROR: %d", err )
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        }
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    return err;
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    }