/
WebConfigurer.java
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/
WebConfigurer.java
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/* Licensed 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.
*/
package org.flowable.rest;
import java.util.EnumSet;
import jakarta.servlet.DispatcherType;
import jakarta.servlet.FilterRegistration;
import jakarta.servlet.MultipartConfigElement;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletContextEvent;
import jakarta.servlet.ServletContextListener;
import jakarta.servlet.ServletRegistration;
import org.flowable.rest.conf.ApplicationConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.filter.DelegatingFilterProxy;
import org.springframework.web.servlet.DispatcherServlet;
/**
* Configuration of web application with Servlet 3.0 APIs.
*/
public class WebConfigurer implements ServletContextListener {
private static final Logger LOGGER = LoggerFactory.getLogger(WebConfigurer.class);
public AnnotationConfigWebApplicationContext context;
public void setContext(AnnotationConfigWebApplicationContext context) {
this.context = context;
}
@Override
public void contextInitialized(ServletContextEvent sce) {
ServletContext servletContext = sce.getServletContext();
LOGGER.debug("Configuring Spring root application context");
AnnotationConfigWebApplicationContext rootContext = null;
if (context == null) {
rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(ApplicationConfiguration.class);
rootContext.refresh();
} else {
rootContext = context;
}
servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, rootContext);
EnumSet<DispatcherType> disps = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.ASYNC);
initSpring(servletContext, rootContext);
initSpringSecurity(servletContext, disps);
LOGGER.debug("Web application fully configured");
}
/**
* Initializes Spring and Spring MVC.
*/
private ServletRegistration.Dynamic initSpring(ServletContext servletContext, AnnotationConfigWebApplicationContext rootContext) {
LOGGER.debug("Configuring Spring Web application context");
AnnotationConfigWebApplicationContext dispatcherServletConfiguration = new AnnotationConfigWebApplicationContext();
dispatcherServletConfiguration.setParent(rootContext);
dispatcherServletConfiguration.register(DispatcherServletConfiguration.class);
LOGGER.debug("Registering Spring MVC Servlet");
ServletRegistration.Dynamic dispatcherServlet = servletContext.addServlet("dispatcher", new DispatcherServlet(dispatcherServletConfiguration));
dispatcherServlet.addMapping("/service/*");
dispatcherServlet.setMultipartConfig(new MultipartConfigElement((String) null));
dispatcherServlet.setLoadOnStartup(1);
dispatcherServlet.setAsyncSupported(true);
return dispatcherServlet;
}
/**
* Initializes Spring Security.
*/
private void initSpringSecurity(ServletContext servletContext, EnumSet<DispatcherType> disps) {
LOGGER.debug("Registering Spring Security Filter");
FilterRegistration.Dynamic springSecurityFilter = servletContext.addFilter("springSecurityFilterChain", new DelegatingFilterProxy());
springSecurityFilter.addMappingForUrlPatterns(disps, false, "/*");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
LOGGER.info("Destroying Web application");
WebApplicationContext ac = WebApplicationContextUtils.getRequiredWebApplicationContext(sce.getServletContext());
AnnotationConfigWebApplicationContext gwac = (AnnotationConfigWebApplicationContext) ac;
gwac.close();
LOGGER.debug("Web application destroyed");
}
}