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.service.creator;
023
024import com.google.gwt.core.client.GWT;
025import de.novanic.eventservice.client.event.service.EventService;
026import de.novanic.eventservice.client.event.service.EventServiceAsync;
027
028/**
029 * The {@link de.novanic.eventservice.client.event.service.creator.EventServiceCreator} is a factory to
030 * create a new {@link de.novanic.eventservice.client.event.service.EventServiceAsync} which is required
031 * for the connection to the server side.
032 *
033 * The default implementation uses a standard way to map GWT services and creates a service instance of
034 * {@link de.novanic.eventservice.client.event.service.EventService}. 
035 *
036 * @author sstrohschein
037 *         <br>Date: 19.10.2010
038 *         <br>Time: 22:47:12
039 */
040public final class DefaultEventServiceCreator implements EventServiceCreator
041{
042    /**
043     * The {@link DefaultEventServiceCreator} should be created via the getInstance method.
044     * @see DefaultEventServiceCreator#getInstance()
045     */
046    private DefaultEventServiceCreator() {}
047
048    /**
049     * The {@link DefaultEventServiceCreator} should be created via the getInstance method.
050     * @see DefaultEventServiceCreatorHolder#getInstance()
051     */
052    private static class DefaultEventServiceCreatorHolder {
053        private static DefaultEventServiceCreator INSTANCE = new DefaultEventServiceCreator();
054    }
055
056    /**
057     * Factory-Holder class to ensure thread-safe lazy-loading with IODH.
058     */
059    public static EventServiceCreator getInstance() {
060        return DefaultEventServiceCreatorHolder.INSTANCE;
061    }
062
063    /**
064     * Creates a new {@link de.novanic.eventservice.client.event.service.EventServiceAsync} which is required
065     * for the connection to the server side.
066     * This implementation uses a standard way to map GWT services and creates a service instance of
067     * {@link de.novanic.eventservice.client.event.service.EventService}.
068     * @return {@link de.novanic.eventservice.client.event.service.EventServiceAsync} interface for the server side service
069     */
070    public EventServiceAsync createEventService() {
071        return (EventServiceAsync)GWT.create(EventService.class);
072    }
073}