emailservices/emailserver/cmailhandlerplugin/inc/PSSubscriber.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 22:37:30 +0200
branchRCL_3
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*       Subscriber class for Publish & Subsribe events
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*
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*/
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#ifndef PSSUBSCRIBER_H
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#define PSSUBSCRIBER_H
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#include <e32base.h>
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#include <e32property.h>
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class MPSSubscribeHandler;
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/**
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*  CPSSubscriber is an acitve object that subscribes to a single
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*  Publish and Subscribe Property and notifies about the Property changes.
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*/
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class CPSSubscriber : public CActive
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{
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public:
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    /**
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    * Two-phased constructor.
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	*
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	* @param aPropertyResponder The object to be notified about Property changes
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	* @param aCategory The category of the Property to be observed
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	* @param aKey The subkey of the Property to be observed
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    */
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    static CPSSubscriber* NewL( MPSSubscribeHandler& aPropertyResponder, const TUid& aCategory, TUint aKey );
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    /**
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    * Destructor.
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    */
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     ~CPSSubscriber();
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	 /**
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	  * Subscribes to the Property given in constructor
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	  */
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     void Subscribe();
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private:
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	/**
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     * C++ default constructor.
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	 *
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  	 * @param aPropertyResponder The object to be notified about Property changes
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	 * @param aCategory The category of the Property to be observed
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	 * @param aKey The subkey of the Property to be observed
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     */
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    CPSSubscriber( MPSSubscribeHandler& aPropertyResponder, const TUid& aCategory, TUint aKey );
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    /**
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     * By default Symbian 2nd phase constructor is private.
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     */
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	 void ConstructL();
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public: // from CActive
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    /**
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	*   RunL
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    */
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    void RunL();
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    /**
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	*   RunError
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    *	@param aError the error returned
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	*
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    *	@return error
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    */
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    TInt RunError( TInt aError );
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    /**
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    *	DoCancel
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    */
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    void DoCancel();
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private: // Methods not implemented
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    CPSSubscriber( const CPSSubscriber& );           // Copy constructor
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    CPSSubscriber& operator=( const CPSSubscriber& );// Assigment operator
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private: // data
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	// The object to be notified about Property changes
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    MPSSubscribeHandler&      iPropertyResponder;
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	// The property object that subscribes to the Property to be observed
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    RProperty                 iProperty;
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	// The category of the Property to be observed
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    TUid                      iCategory;
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	// The subkey of the Property to be observed
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	TUint                     iKey;
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};
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#endif // PSSUBSCRIBER_H