How to use listener-class in spring boot 2.2.1 RELEASE - spring

Question

Migrating Spring web project into spring boot application with following versions
Spring version:-4.1.7
Spring boot:2.2.1 RELEASE
part of migration i need to remove src/main/web-app folder.In this folder i have two files
dispatcher-servlet.xml
web.xml
dispatcher-servlet
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.data.services" />
<bean id="systemPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" />
<mvc:interceptors>
<bean class="com.data.services.interceptors.RequestLogInterceptor" />
</mvc:interceptors>
</beans>
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
metadata-complete="true" version="3.0">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<context-param>
<param-name>spring.profiles.active</param-name>
<param-value>XERService</param-value>
</context-param>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/conf/log4j.properties</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>30000</param-value>
</context-param>
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>xerwebapp.root</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>com.data.services.configuration.ServiceContextListener</listener-class>
</listener>
</web-app>
ServiceContextListener
#WebListener("Service context listener")
public class ServiceContextListener implements ServletContextListener
{
public static final Logger LOG = Logger.getLogger("XERService");
/**
* Context initializer. This method sets the root folder for the log4j
*/
#Override
public void contextInitialized(ServletContextEvent event)
{
}
#Override
public void contextDestroyed(ServletContextEvent event)
{
try
{
LoggingPropertyHandler.clear();
if (XFabSiteConfigManager.getInstance().getRequesterConfigInfo() != null)
{
XFabFactory.getXfabInstance().unInitializeRequester();
}
}
catch (Exception exception)
{
LOG.warn("Exception while uninitializing Requestor", exception);
}
}
}
RequestLogInterceptor
#Component
public class equestLogInterceptor extends HandlerInterceptorAdapter
{
/**
* Method to add the Audit user in the log
*/
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception
{
String auditUser = request.getHeader(RequestParameterConstants.AUDIT_USER);
if (auditUser == null)
{
auditUser = "";
}
LoggingPropertyHandler.addAuditUserName(auditUser);
return true;
}
}
How can we include following listener in spring boot
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>com.data.services.configuration.ServiceContextListener</listener-class>
</listener>
Is there any simplest mechanism available in spring boot.

Answer 1

You can create the Listener bean like this:
// Register ServletContextListener
#Bean
public ServletListenerRegistrationBean<ServletContextListener> listenerRegistrationBean() {
ServletListenerRegistrationBean<ServletContextListener> bean =
new ServletListenerRegistrationBean<>();
bean.setListener(new MyServletContextListener());
return bean;
}