fr.gael.dhus.gwt.GWTWebapp.java Source code

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Here is the source code for fr.gael.dhus.gwt.GWTWebapp.java

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/*
 * Data Hub Service (DHuS) - For Space data distribution.
 * Copyright (C) 2013,2014,2015 GAEL Systems
 *
 * This file is part of DHuS software sources.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package fr.gael.dhus.gwt;

import java.io.InputStream;
import java.util.ArrayList;

import javax.servlet.Servlet;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.type.filter.AnnotationTypeFilter;

import fr.gael.dhus.gwt.services.annotation.RPCService;
import fr.gael.dhus.server.http.web.WebApplication;
import fr.gael.dhus.server.http.web.WebComponent;
import fr.gael.dhus.server.http.web.WebServlet;

@WebComponent
public class GWTWebapp extends WebApplication {
    private static Log logger = LogFactory.getLog(GWTWebapp.class);

    @Override
    public void init() {
        this.name = "";
        this.servlets = new ArrayList<WebServlet>();
        this.welcomeFiles = new ArrayList<String>();

        servlets.add(new GWTClientWebServlet("home", "/home"));

        welcomeFiles.add("home");

        ClassPathScanningCandidateComponentProvider scan = new ClassPathScanningCandidateComponentProvider(false);
        scan.addIncludeFilter(new AnnotationTypeFilter(RPCService.class));
        logger.info("    Initializing RPC services");
        for (BeanDefinition bd : scan.findCandidateComponents("fr.gael.dhus.gwt.services")) {
            logger.info("     - service : " + bd.getBeanClassName());
            try {
                Class<?> servletClass = GWTWebapp.class.getClassLoader().loadClass(bd.getBeanClassName());
                RPCService annotation = AnnotationUtils.findAnnotation(servletClass, RPCService.class);
                servlets.add(new RPCServlet((Servlet) (servletClass.newInstance()), annotation.value(),
                        "/" + annotation.value()));
            } catch (ClassNotFoundException e) {
                System.err.println("Cannot load service : '" + bd.getBeanClassName() + "'");
                e.printStackTrace();
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }

    private class RPCServlet extends WebServlet {
        protected RPCServlet(Servlet servlet, String servletName, String urlPattern) {
            this.servlet = servlet;
            this.servletName = servletName;
            this.urlPattern = urlPattern;
        }
    }

    private class GWTClientWebServlet extends WebServlet {
        protected GWTClientWebServlet(String servletName, String urlPattern) {
            this.servlet = new GWTClientServlet();
            this.servletName = servletName;
            this.urlPattern = urlPattern;
        }
    }

    @Override
    public InputStream getWarStream() {
        return GWTWebapp.class.getClassLoader().getResourceAsStream("dhus-gwt-client.war");
    }
}