Java tutorial
package se.kth.csc.controller; /* * #%L * QWait * %% * Copyright (C) 2013 - 2014 KTH School of Computer Science and Communication * %% * 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 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/>. * #L% */ import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.core.Ordered; import org.springframework.core.annotation.Order; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import se.kth.csc.persist.AccountStore; import javax.servlet.http.HttpServletRequest; import java.net.InetAddress; import java.net.UnknownHostException; /** * Controls the home page. */ @Controller public class HomeController { private static final Logger log = LoggerFactory.getLogger(HomeController.class); private final AccountStore accountStore; protected HomeController() { // Needed for injection accountStore = null; } @Autowired public HomeController(AccountStore accountStore) { this.accountStore = accountStore; } /** * The welcome page of the web application */ @Order(Ordered.LOWEST_PRECEDENCE - 1000) @RequestMapping(value = { "/", "/about", "/help", "/queue/**", "/admin" }, method = RequestMethod.GET) public ModelAndView index(HttpServletRequest request) { String hostname; try { hostname = InetAddress.getByName(request.getRemoteHost()).getCanonicalHostName(); } catch (UnknownHostException e) { log.error("Hostname error", e); hostname = null; } return new ModelAndView("index", "hostname", hostname); } // Used to enforce authentication when logging in from welcome page @RequestMapping(value = "/login", method = { RequestMethod.GET }) public String login(@RequestParam("target") String target) { return "redirect:" + target; } }