diff -r 000000000000 -r 4e1aa6a622a0 accessoryservices/pluggeddisplay/pluggeddisplayengine/src/centralrepositorywatch.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessoryservices/pluggeddisplay/pluggeddisplayengine/src/centralrepositorywatch.cpp	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,224 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  A class to watch changes of key values in Central Repository.
+*
+*/
+
+
+
+#include    <e32base.h>
+#include    <e32def.h>
+#include    <centralrepository.h>
+
+
+#include "centralrepositorywatch.h"
+#include "trace.h"
+
+
+// ======== LOCAL FUNCTIONS ========
+
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------
+// Symbian two-phased constructor
+// ---------------------------------------------------------
+//
+CCentralRepositoryWatch* CCentralRepositoryWatch::NewL(
+        MCentralRepositoryObserver&   aObserver,
+        TUid aRepositoryUid,
+        TUint32 aKeyId )
+    {
+    FUNC_LOG;
+    CCentralRepositoryWatch* self = new ( ELeave ) CCentralRepositoryWatch(
+            aObserver,
+            aRepositoryUid,
+            aKeyId );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// Symbian two-phased constructor
+// ---------------------------------------------------------------------------
+//
+CCentralRepositoryWatch* CCentralRepositoryWatch::NewLC(
+        MCentralRepositoryObserver&   aObserver,
+        TUid aRepositoryUid,
+        TUint32 aKeyId )
+    {
+    FUNC_LOG;
+    CCentralRepositoryWatch* self = new( ELeave ) CCentralRepositoryWatch(
+            aObserver,
+            aRepositoryUid,
+            aKeyId );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    return self;
+    }
+
+
+// ---------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------
+//
+CCentralRepositoryWatch::~CCentralRepositoryWatch()
+    {
+    FUNC_LOG;
+    Cancel();
+    delete iRepository;
+    }
+
+// ---------------------------------------------------------
+// SubscribeNotification
+// ---------------------------------------------------------
+//
+void CCentralRepositoryWatch::Watch()
+    {
+    FUNC_LOG;
+    // Subscribe
+    if ( !IsActive() )
+        {
+        iRepository->NotifyRequest( iKey, iStatus );
+        SetActive();        
+        }
+    return;
+    }
+
+
+// ---------------------------------------------------------
+// Get current value.
+// ---------------------------------------------------------
+//
+TInt CCentralRepositoryWatch::GetCurrentValue( TInt& aValue)
+    {
+    FUNC_LOG;
+    TInt value(0);
+    TInt aError = iRepository->Get(iKey, value); //try to get the value
+    if(KErrNone == aError)
+        {
+        aValue = value;
+        }
+    else 
+        {
+        iObserver.CentRepGetKeyValueFailed( iRepositoryUid, iKey, aError );
+        }
+    INFO_1( "Return aValue 0x%x", aValue );
+    return aError;
+    }
+
+
+// ---------------------------------------------------------
+// From class CActive.
+// DoCancel
+// ---------------------------------------------------------
+//
+void CCentralRepositoryWatch::DoCancel()
+    {
+    FUNC_LOG;
+    iRepository->NotifyCancel( iKey );
+    }
+
+
+// ---------------------------------------------------------
+// C++ constructor
+// ---------------------------------------------------------
+//
+CCentralRepositoryWatch::CCentralRepositoryWatch(
+        MCentralRepositoryObserver& aObserver,
+        TUid aRepositoryUid,
+        TUint32 aKeyId )
+    : CActive ( EPriorityStandard),
+    iObserver ( aObserver )
+    {
+    FUNC_LOG;
+    iRepositoryUid = aRepositoryUid;
+    iKey = aKeyId;
+    }
+
+
+// ---------------------------------------------------------
+// ConstructL
+// ---------------------------------------------------------
+//
+void CCentralRepositoryWatch::ConstructL( )
+    {
+    FUNC_LOG;
+    // Connect CenRep
+    iRepository = CRepository::NewL( iRepositoryUid );
+    // Check that key is valid
+    TInt aCurrentValue;
+    TInt errorCode = GetCurrentValue( aCurrentValue );
+    if ( KErrNone != errorCode )
+        {
+        User::Leave( errorCode );
+        }
+    CActiveScheduler::Add( this );
+    return;
+   }
+
+// ---------------------------------------------------------
+// From class CActive.
+// RunL
+// ---------------------------------------------------------
+//
+void CCentralRepositoryWatch::RunL()
+    {
+    FUNC_LOG;
+
+    // Get the value
+    TInt aCurrentValue = 0;
+    
+    // Re-subscribe before notifying The Master
+    iRepository->NotifyRequest( iKey, iStatus );
+    SetActive();
+    
+    TInt errorCode = GetCurrentValue( aCurrentValue );
+    if ( KErrNone == errorCode )
+        {
+        // Notify requester
+        iObserver.CentRepKeyChanged(
+                iRepositoryUid,
+                iKey );
+        }
+    else
+        {
+        INFO_1( "RRepsitory::Get()failed aError %d", errorCode );
+        iObserver.CentRepGetKeyValueFailed( iRepositoryUid, iKey, errorCode );
+        }
+    }
+
+
+// ---------------------------------------------------------
+// From class CActive.
+// RunL
+// ---------------------------------------------------------
+//
+TInt CCentralRepositoryWatch::RunError( TInt aError )
+    {
+    FUNC_LOG;
+    // Avoid Panic in CActiveScheduler
+    INFO_1( "aError %d", aError );
+    INFO("Issuing a new request for key value changes");
+    Watch();
+    aError = KErrNone;
+    return aError;
+    }
+
+
+// ======== GLOBAL FUNCTIONS ========
+