apengine/apeng/inc/ActiveApDbNotifier.h
changeset 70 ac5daea24fb0
parent 0 5a93021fdf25
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/apengine/apeng/inc/ActiveApDbNotifier.h	Wed Oct 27 17:43:56 2010 +0300
@@ -0,0 +1,93 @@
+/*
+* 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: 
+*     Declares the CActiveApDbNotifier class.
+*
+*/
+
+
+#ifndef ACTIVE_AP_DB_NOTIFIER_H
+#define ACTIVE_AP_DB_NOTIFIER_H
+
+//  INCLUDES
+
+#include <e32base.h>
+#include <ApEngineVer.h>
+
+
+// FORWARD DECLARATIONS
+
+class CActiveApDb;
+
+// CLASS DECLARATION
+
+/**
+* Active object encapsulating an access point database notifier.
+* Used by CActiveApDb.
+*/
+class CActiveApDbNotifier : public CActive
+    {
+    public:     // construct / destruct
+
+        /**
+        * Constructor.
+        * @param aDb Active access point database to watch for.
+        */
+        CActiveApDbNotifier( CActiveApDb& aDb );
+
+        /**
+        * Destructor.
+        */
+        virtual ~CActiveApDbNotifier();
+
+    protected:  // from CActive
+        /**
+        * Invoked when the outstanding request completes.
+        */
+        void RunL() ;
+
+        /**
+        * Implementation of the Cancel protocol;
+        * cancel any outstanding request.
+        */
+        void DoCancel();
+
+    public:     // new methods
+
+        /**
+        * Start the notifier. The notification request is automatically
+        * renewed until it is cancelled, or the database is closed by
+        * all clients (i.e. released by DBMS).
+        */
+        void Start();
+
+        /**
+        * Cancel and close the notifier now.
+        */
+        void Stop();
+
+    private:
+        /**
+        * Request database change notification from the Access Point Engine.
+        */
+        void NotifyChange();
+
+    private:    // data
+        CActiveApDb* iActiveDb;     ///< Pointer to the database.
+                                    ///< Does not owns it.
+    };
+
+#endif
+
+// End of File