code: /***************************************************************************
   *   Copyright (C) by Fabrizio Montesi                                     *
   *                                                                         *
   *   This program is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU Library General Public License as       *
   *   published by the Free Software Foundation; either version 2 of the    *
   *   License, or (at your option) any later version.                       *
   *                                                                         *
   *   This program is distributed in the hope that it will be useful,       *
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
   *   GNU General Public License for more details.                          *
   *                                                                         *
   *   You should have received a copy of the GNU Library General Public     *
   *   License along with this program; if not, write to the                 *
   *   Free Software Foundation, Inc.,                                       *
   *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
   *                                                                         *
   *   For details about the authors of this software, see the AUTHORS file. *
   ***************************************************************************/
  
  package joliex.gwt.client;
  
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.user.client.rpc.RemoteService;
  import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
  
  @RemoteServiceRelativePath("JolieService")
  public interface JolieService extends RemoteService
  {
  	/**
  	 * Utility class for simplifying access to the instance of async service.
  	 */
  	public static class Util {
  		private static JolieServiceAsync instance;
  		public static JolieServiceAsync getInstance() {
  			if ( instance == null ) {
  				instance = (JolieServiceAsync)GWT.create( JolieService.class );
  			}
  			return instance;
  		}
  	}
  
  	/**
  	 * Performs a Request-Response operation call.
  	 * @param operationName the operation to invoke
  	 * @param value the request data
  	 * @return the response data
  	 * @throws joliex.gwt.client.FaultException
  	 */
  	public Value call( String operationName, Value value )
  		throws FaultException;
  }
  