/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  

*

*/

#ifndef __ASYNCREQOBSERVER_H

#define __ASYNCREQOBSERVER_H

/**

 * Structure for storing transaction id and associated active object.

*/

struct TAsyncRequestInfo

	{

    /**

     * TransactionId

    */

	TInt32 iTransactionId;

    /**

     * Active object pointer

    */

	CCalendarASyncRequest* iAsyncObj;

	};	

/**

 *  Class used to get callback notification from async request module 

 *	about completion of request. 

*/

class CAsyncRequestObserver : public CBase

	{

	public:

		/**

		 * Two-Phase Constructor

		*/ 

		static CAsyncRequestObserver* NewL();

		/**

		 * Destructor

		*/ 

		~CAsyncRequestObserver();

		/**

		   * Notifies about the completeion of an async request

		   * @param aTransactionId TransactionId of Asynchronous request object

		   * @return void

	  	*/

		void RequestComplete( const TInt32 aTransactionId );

		/**

		 * Cancels asynchronous request

		 * @param aTransactionId     asynchronous transaction id

		 * @param aResult        error code

		*/ 				

		TInt Cancel( const TInt32 aTransectionID );

		/**

		 * Adds asynchronous request object

		 * @param aTransactionId Transcation Id os Async object

		 * @param aAsyncObj  Async object

		*/ 

		void AddAsyncObjL( const TInt32 aTransactionId, CCalendarASyncRequest* aAsyncObj );

	private:

	   /**

		 * Deletes all the Asynchronous request objects

		*/

		void DeleteAsyncObjects();

	private:

		/**

		 * Contains handles of all asynchronous requests

	  	*/ 

		RArray<TAsyncRequestInfo> iAsyncObjArray;

	};

#endif __ASYNCREQOBSERVER_H