--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/apengine/apeng/src/ActiveApDb.cpp	Thu Dec 17 08:55:21 2009 +0200
@@ -0,0 +1,229 @@
+/*
+* Copyright (c) 2002 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:  Implementation of CActiveApDb.
+*
+*/
+
+
+// INCLUDE FILES
+
+#include <ActiveApDb.h>
+#include "ActiveApDbNotifier.h"
+#include <ApEngineConsts.h>
+#include "ApEngineCommons.h"
+#include "ApEngineLogger.h"
+
+const TInt KObserverArrayGranularity = 1;
+
+// ================= MEMBER FUNCTIONS =======================
+
+// ---------------------------------------------------------
+// CActiveApDb::NewL
+// ---------------------------------------------------------
+//
+EXPORT_C CActiveApDb* CActiveApDb::NewL( TCommDbDatabaseType /*aType*/ )
+    {
+    CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::NewL" ) ) );
+
+    CActiveApDb* db = new ( ELeave ) CActiveApDb;
+    CleanupStack::PushL( db );
+    db->ConstructL();
+    CleanupStack::Pop( db ); // db
+
+    CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::NewL" ) ) );
+    return db;
+    }
+
+// ---------------------------------------------------------
+// CActiveApDb::~CActiveApDb
+// ---------------------------------------------------------
+//
+EXPORT_C CActiveApDb::~CActiveApDb()
+    {
+    CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::~CActiveApDb" ) ) );
+
+    delete iDbNotifier;
+    delete iObservers;
+    delete iDb;
+
+    CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::~CActiveApDb" ) ) );
+    }
+
+
+// ---------------------------------------------------------
+// CActiveApDb::CActiveApDb
+// ---------------------------------------------------------
+//
+CActiveApDb::CActiveApDb()
+    {
+    }
+
+
+// ---------------------------------------------------------
+// CActiveApDb::ConstructL
+// ---------------------------------------------------------
+//
+void CActiveApDb::ConstructL()
+    {
+    iDb = CCommsDatabase::NewL( );
+    iObservers = new ( ELeave ) CArrayPtrFlat<MActiveApDbObserver>
+                        ( KObserverArrayGranularity );
+    iDbNotifier = new ( ELeave ) CActiveApDbNotifier( *this );
+
+    iState = EReady;
+    }
+
+
+// ---------------------------------------------------------
+// CActiveApDb::AddObserverL
+// ---------------------------------------------------------
+//
+EXPORT_C void CActiveApDb::AddObserverL( MActiveApDbObserver* anObserver )
+    {
+    CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::AddObserverL" ) ) );
+
+    if ( !anObserver )
+        {
+        User::Leave( KErrNullPointerPassed );
+        }
+    iObservers->AppendL( anObserver );
+    iDbNotifier->Start();
+
+    CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::AddObserverL" ) ) );
+    }
+
+
+// ---------------------------------------------------------
+// CActiveApDb::RemoveObserver
+// ---------------------------------------------------------
+//
+EXPORT_C void CActiveApDb::RemoveObserver( MActiveApDbObserver* anObserver )
+    {
+    CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::RemoveObserver" ) ) );
+
+    __ASSERT_DEBUG( anObserver, ApCommons::Panic( ENullPointer ) );
+    TInt count = iObservers->Count();
+    for ( TInt i = 0; i < count; i++ )
+        {
+        if ( iObservers->At( i ) == anObserver )
+            {
+            iObservers->Delete( i );
+            // leave cycle for faster processing, can not return because
+            // we may have to stop() if it was the last one...
+            break;
+            }
+        }
+    if ( !iObservers->Count() )
+        { // no more observers waiting so stop notification...
+        iDbNotifier->Stop();
+        }
+    // for some reason, observer was not found->
+    // Someone has already removed it
+    // simply ignore it
+    CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::RemoveObserver" ) ) );
+
+    }
+
+
+// ---------------------------------------------------------
+// CActiveApDb::Database
+// ---------------------------------------------------------
+//
+EXPORT_C CCommsDatabase*  CActiveApDb::Database()
+    {
+    CLOG( ( EActiveDb, 0, _L( "<-> CActiveApDb::Database" ) ) );
+
+    return iDb;
+    }
+
+// ---------------------------------------------------------
+// CActiveApDb::HandleDbEventL
+// ---------------------------------------------------------
+//
+void CActiveApDb::HandleDbEventL( TInt anEvent )
+    {
+    CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::HandleDbEventL" ) ) );
+
+    // possible events: EClose,EUnlock,ECommit,ERollback,ERecover
+    switch ( anEvent )
+        {
+        case RDbNotifier::EUnlock:
+            {
+            CLOG( ( EActiveDb, 2, _L( "Notifier Unlock" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbAvailable );
+            break;
+            }
+        case RDbNotifier::ECommit:
+            {
+            CLOG( ( EActiveDb, 2, _L( "Notifier Commit" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbChanged );
+            break;
+            }
+        case RDbNotifier::EClose:
+            {
+            CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbClosing );
+            // Use base class' method to keep the notifier alive.
+            // We need to know when all clients has released the db.
+            break;
+            }
+        case RDbNotifier::ERollback:            
+            {
+            CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbAvailable );
+            break;
+            }
+        case RDbNotifier::ERecover:
+            {
+            CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbClosing );
+            // Use base class' method to keep the notifier alive.
+            // We need to know when all clients has released the db.
+            break;
+            }
+        default:
+            {
+            // Don't know what's happened, but instead of
+            // Panicking, it's better to 'simulate' a change.
+            // 'Defensive' programming.
+            CLOG( ( EActiveDb, 2, _L( "Notifier UNKNOWN" ) ) );
+            NotifyObserversL( MActiveApDbObserver::EDbChanged );
+            break;
+            }
+        }
+    CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::HandleDbEventL" ) ) );
+
+    }
+
+
+
+
+// ---------------------------------------------------------
+// CActiveApDb::NotifyObserversL
+// ---------------------------------------------------------
+//
+void CActiveApDb::NotifyObserversL( MActiveApDbObserver::TEvent anEvent )
+    {
+
+    TInt i;
+    TInt count = iObservers->Count();
+    // one hazard is that if one client leaves,
+    // the rest of the clients will not be notified this time...
+    for ( i = 0; i < count; i++ )
+        {
+        TRAP_IGNORE( iObservers->At( i )->HandleApDbEventL( anEvent ) );
+        }
+    }
+
+// End of File