--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phonebookengines_old/contactsmodel/tsrc/CContactDbEventQueue.h	Fri Jun 11 13:29:23 2010 +0300
@@ -0,0 +1,97 @@
+// Copyright (c) 2003-2009 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:
+// CContactDbEventQueue Test module
+// 
+//
+
+#ifndef __CContactDbEventQueue_H__
+#define __CContactDbEventQueue_H__
+
+// INCLUDES
+#include <cntdef.h>
+#include <cntdbobs.h>
+#include "cfixedqueue.h"
+
+
+// CLASS DECLARATION
+class CContactChangeNotifier;
+class CContactDatabase;
+
+
+/**
+ * Contact Engine event queue class.
+ */ 
+class CContactDbEventQueue : 
+        public CTimer, public MContactDbObserver
+    {
+    public:
+        /**
+         * Creates a new event queue.
+         * @param aDb   contact DB to listen for events.
+         * @param aMaxQueueSize maximum size of event queue.
+         * @return a new instance of this class.
+         */
+        static CContactDbEventQueue* NewL
+            (CContactDatabase* aDb=NULL, TInt aMaxQueueSize=128);
+        ~CContactDbEventQueue();
+
+        /**
+         * Waits for an event from the database.
+         * @param aTimeOut  max time to wait for an event.
+         * @param aEvent    the received event, undefined if this function returns false.
+         * @return true if an event was received, false if timeout expired first.
+         */
+        TBool ListenForEvent
+            (TTimeIntervalSeconds aTimeOut, 
+            TContactDbObserverEvent& aEvent);
+            
+         /**
+         * Pops Events from the event queue.  Required to avoid filling the queue.
+         */    
+        void PopEvent();           
+
+         /**
+         * Pops All Events from the event queue. Required to avoid queue overflow.
+         */    
+		void Clear();
+
+        /**
+         * Removes all previously arrived events from the queue.
+         */
+        inline void Flush()
+            {
+            iQueue.Reset();
+            }
+
+    protected: // From MContactDbObserver.
+	    void HandleDatabaseEventL(TContactDbObserverEvent aEvent);
+
+    private:  
+        void RunL(); // from CTimer
+        CContactDbEventQueue();
+        void ConstructL(CContactDatabase* aDb, TInt aMaxQueueSize);
+
+    private:  
+        // Own: the notifier for attaching to CContactDatabase
+        CContactChangeNotifier* iNotifier;
+        // Own: event queue array
+        CFixedQueue<TContactDbObserverEvent> iQueue;
+    };
+
+#endif  // __CContactDbEventQueue_H__
+
+
+
+
+