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/*
 * GWTEventService
 * Copyright (c) 2011 and beyond, strawbill UG (haftungsbeschr?nkt)
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 * Other licensing for GWTEventService may also be possible on request.
 * Please view the license.txt of the project for more information.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package de.novanic.eventservice.client.command;

import com.google.gwt.user.client.rpc.AsyncCallback;
import de.novanic.eventservice.client.event.service.EventServiceAsync;

/**
 * A RemoteCommand can be used to execute a call from client to the server side. The possibility to queue RemoteCommands
 * is one of the advantages.
 *
 * @author sstrohschein
 * 
Date: 06.06.2008 *
Time: 22:38:48 */ public interface RemoteCommand { /** * Initializes the RemoteCommand with a callback, which can also be used in the execute method * {@link de.novanic.eventservice.client.command.RemoteCommand#execute(de.novanic.eventservice.client.event.service.EventServiceAsync)} * @param aCallback callback */ void init(AsyncCallback aCallback); /** * Checks if the RemoteCommand is initialized with a callback. * @return true when the init method ({@link de.novanic.eventservice.client.command.RemoteCommand#init(com.google.gwt.user.client.rpc.AsyncCallback)}) * was called with a callback, false when the RemoteCommand wasn't initialized with a callback. */ boolean isInitialized(); /** * This method executes the RemoteCommand. This method has access to {@link de.novanic.eventservice.client.event.service.EventService} * and to the initialized callback ({@link de.novanic.eventservice.client.command.RemoteCommand#getCallback()}). * @param anEventService {@link de.novanic.eventservice.client.event.service.EventService} */ void execute(EventServiceAsync anEventService); /** * Returns the callback, which can be set with the link method * ({@link de.novanic.eventservice.client.command.RemoteCommand#init(com.google.gwt.user.client.rpc.AsyncCallback)}) * @return callback */ AsyncCallback getCallback(); }




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