UiWebAppInitializer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 * (c) 2015 - Interseroh and Crowdcode
 */
package de.interseroh.report.webapp;

import java.util.EnumSet;

import javax.servlet.DispatcherType;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.filter.DelegatingFilterProxy;
import org.springframework.web.servlet.DispatcherServlet;

import de.interseroh.report.webconfig.SecurityConfig;
import de.interseroh.report.webconfig.WebMvcConfig;

public class UiWebAppInitializer implements WebApplicationInitializer {

	private static final Logger logger = LoggerFactory
			.getLogger(UiWebAppInitializer.class);

	private static final String VIEWS_BASE = "/";

	private static final String DISPATCHER_SERVLET_NAME = "dispatcher";

	private static final String SPRING_SECURITY_FILTER_NAME = "springSecurityFilterChain";

	@Override
	public void onStartup(ServletContext servletContext)
			throws ServletException {
		logger.info("WebApp *report-cockpit-birt-web* starts...");

		WebApplicationContext rootContext = getRootContext();
		servletContext.addListener(new ContextLoaderListener(rootContext));
		servletContext.addListener(new SessionListener());

		addMvcServlet(servletContext);
		addSecurityFilter(servletContext);

		logger.info("WebApp *report-cockpit-birt-web* ready...");
	}

	private void addMvcServlet(ServletContext servletContext) {
		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
		context.register(WebMvcConfig.class);

		DispatcherServlet dispatcherServlet = new DispatcherServlet(context);
		ServletRegistration.Dynamic dispatcher = servletContext
				.addServlet(DISPATCHER_SERVLET_NAME, dispatcherServlet);
		dispatcher.setLoadOnStartup(1);
		dispatcher.addMapping(VIEWS_BASE);
	}

	private void addSecurityFilter(ServletContext servletContext) {
		servletContext
				.addFilter(SPRING_SECURITY_FILTER_NAME,
						DelegatingFilterProxy.class)
				.addMappingForUrlPatterns(
						EnumSet.<DispatcherType> of(DispatcherType.REQUEST,
								DispatcherType.FORWARD),
						false, "/*");
	}

	private AnnotationConfigWebApplicationContext getRootContext() {
		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
		context.register(SecurityConfig.class);
		return context;
	}

}