/*

* Copyright (c) 2004 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:  See class definition below.

*

*/

#ifndef __RTCWATCHER_H__

#define __RTCWATCHER_H__

//	INCLUDES

#include <e32base.h>

//	CLASS DEFINITION

/**

 * RTcWatcher implements the client-side endpoint of a Watcher

 * client-server session. A connected client must call Ping()

 * at intervals shorter than aTimeout specified in Connect().

 * Failing to do that will result in the application specified

 * in Connect() being terminated and restarted.

 */

class RTcWatcher

	: public RSessionBase

	{

	public: // Constructors and destructor

		/// Default constructor

		IMPORT_C RTcWatcher();

	public: // from RHandleBase

		/// Closes the connection to the server.

		/// Stops watching for this client.

		IMPORT_C void Close();

	public:	// New methods

		/**

		 * Establishes a connection to the Watcher server.

		 * The server is automatically started if it was not already

		 * up and running.

		 *

		 * Start watching for this client. The client is killed if it does

		 * not report in every aTimeout seconds. The client is restarted

		 * if it dies by itself or gets killed by the timeout.

		 *

		 * @param aAppName Application name and full path, for restarting.

		 * @param aTimeout Kill timeout.

		 * @return KErrNone if operation was successful, otherwise

		 *		   one of the standard system-wide error codes.

		 */

		IMPORT_C TInt Connect( const TDesC& aAppName, TInt aTimeout );

		/// To be called a couple of times within the aTimeout

		/// Failing to do that will result in client death.

		IMPORT_C TInt Ping();

		/// @return Server version number.

		IMPORT_C TVersion Version() const;

	private: // New methods

		/// Starts the server process.

		void StartServerL();

		/// @return ETrue if the server is already/still running

		TBool IsServerStarted() const;

	private: // Data

		/// ETrue if there is an open connection, EFalse otherwise.

		TBool iIsConnected;

    };

#endif  // __RTCWATCHER_H__