org.geomajas.gwt.server.GeomajasServiceImpl.java Source code

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Here is the source code for org.geomajas.gwt.server.GeomajasServiceImpl.java

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/*
 * This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
 *
 * Copyright 2008-2014 Geosparc nv, http://www.geosparc.com/, Belgium.
 *
 * The program is available in open source according to the GNU Affero
 * General Public License. All contributions in this program are covered
 * by the Geomajas Contributors License Agreement. For full licensing
 * details, see LICENSE.txt in the project root.
 */

package org.geomajas.gwt.server;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import org.geomajas.command.CommandDispatcher;
import org.geomajas.command.CommandResponse;
import org.geomajas.annotation.Api;
import org.geomajas.gwt.client.GeomajasService;
import org.geomajas.gwt.client.command.GwtCommand;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.web.context.support.WebApplicationContextUtils;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Geomajas GWT service, implements communication between GWT face and back-end.
 * 
 * @author Pieter De Graef
 * @author Joachim Van der Auwera
 * @author Jan De Moerloose
 * @since 2.0.0
 */
@Api(allMethods = true)
public class GeomajasServiceImpl extends RemoteServiceServlet
        implements GeomajasService, ApplicationListener<ContextRefreshedEvent> {

    private static final long serialVersionUID = -4388317165048891159L;

    private ApplicationContext applicationContext;

    private CommandDispatcher commandDispatcher;

    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);

        // register the controller object
        applicationContext = WebApplicationContextUtils.getWebApplicationContext(config.getServletContext());
        if (applicationContext instanceof ConfigurableApplicationContext) {
            ((ConfigurableApplicationContext) applicationContext).addApplicationListener(this);
        }
        initDispatcher();
    }

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.service(req, resp);
    }

    /**
     * Execute a GWT RPC command request, and return the response. These request come from the client, and the response
     * is sent back to the client. We use a {@link CommandDispatcher} to actually execute the command.
     */
    public CommandResponse execute(GwtCommand request) {
        if (request != null) {
            return commandDispatcher.execute(request.getCommandName(), request.getCommandRequest(),
                    request.getUserToken(), request.getLocale());
        }
        return null;
    }

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        initDispatcher();
    }

    /**
     * Initialize dispatcher.
     */
    protected void initDispatcher() {
        commandDispatcher = applicationContext.getBean("command.CommandDispatcher", CommandDispatcher.class);
    }
}