Autowiring bean in Session Listener - spring

Question

I need to Autowire a service class annotated with #Service annotation in my session listener class as I need to perform some DB operation on session destroyed method. I am not able to autowire the service class as I have added the listener in my web.xml and it is no longer spring managed. I have tried several options(workarounds) like getting a bean from application context via servlet context but I am not getting any beans in that way.
Following are my classes:-
MyService:
#Service
#Transactional
public class FxTransactionService{
//some autowirings
public void performDBoperation(Long id)
{
//business logic
}
}
Session Listener:
public class SessionHandler implements HttpSessionListener {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
#Autowired
private MyService myService;
#Override
public void sessionCreated(HttpSessionEvent arg0) {
System.out.println("Session created");
ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(arg0.getSession()
.getServletContext());
System.out.println(Arrays.toString(context.getBeanDefinitionNames()));
//This gives me empty list
}
#Override
public void sessionDestroyed(HttpSessionEvent arg0) {
Long id = (Long) arg0.getSession().getAttribute("Id");
myService.performDBoperation(id);
}
}
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>com.abc.controller.SessionHandler</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<filter>
<filter-name>preAuthHeaderAdditionFilter</filter-name>
<filter-class>com.abc.filter.PreAuthHeaderAdditionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>preAuthHeaderAdditionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- <filter> <filter-name>openEntityManagerInViewFilter</filter-name> <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter> <filter-mapping> <filter-name>openEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern> </filter-mapping> -->
</web-app>

Answer 1

First install the Spring listener ContextLoaderListener.
In your own listener you can access the context using WebApplicationContextUtils.
It is not autowiring though, you have to fetch the required bean/service yourself.