/*

* Copyright (c) 2006 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:  plugin monitor observer

*

*/

#ifndef MMPXPLUGINMONITOROBSERVER_H

#define MMPXPLUGINMONITOROBSERVER_H

/**

*  Observer interface for a plugin monitor.

*

*  @lib mpxcommon.lib

*/

NONSHARABLE_CLASS(MMPXPluginMonitorObserver)

    {

    public:

        /**

        *  Callback whenever there is a change in loaded plugins. This is

        *  called from CMPXPluginMonitor::RunL and should not be a long

        *  running task.

        *

        *  @since S60 3.2.3

        */

        virtual void PluginsChangedL() = 0;

        /**

        *  Indicates that a plugin should be unloaded if it is loaded by the observer.

        *  This call is made when a plugin update is detected by a plugin handler and

        *  after all old plugin instances are unloaded the plugin handler can load the

        *  new plugin version. All plugin handlers should maintain the reference count

        *  for the plugin, as they will get a PluginsChangedL notification following one

        *  or multiple HandlePluginUnload calls and they will need to know what plugins

        *  were loaded before the update so they can be reloaded.

        *

        *  @since S60 3.2.3

        */

        virtual void HandlePluginUnload(const TUid& aPluginUid) = 0;

    };

#endif      // MMPXPLUGINMONITOROBSERVER_H