001/*
002 * GWTEventService
003 * Copyright (c) 2011 and beyond, strawbill UG (haftungsbeschr?nkt)
004 *
005 * This is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU Lesser General Public License as
007 * published by the Free Software Foundation; either version 3 of
008 * the License, or (at your option) any later version.
009 * Other licensing for GWTEventService may also be possible on request.
010 * Please view the license.txt of the project for more information.
011 *
012 * This software is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this software; if not, write to the Free
019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021 */
022package de.novanic.eventservice.client.event.command;
023
024import com.google.gwt.user.client.rpc.AsyncCallback;
025
026/**
027 * Command which is used at the client side.
028 *
029 * @author sstrohschein
030 *         <br>Date: 27.03.2009
031 *         <br>Time: 23:29:21
032 */
033public interface ClientCommand<R>
034{
035    /**
036     * Executes the command at the client side.
037     * {@link ClientCommand#getCommandCallback()} can be used to get the callback when the command
038     */
039    void execute();
040
041    /**
042     * Returns the callback of the command. That can be used to get the callback when the command executes a server
043     * call.
044     * @return callback of the command
045     */
046    AsyncCallback<R> getCommandCallback();
047}