How to inject dependencies into HttpSessionListener, using Spring?

by

Since the Servlet 3.0 ServletContext has an “addListener” method, instead of adding your listener in your web.xml file you could add through code like so:

@Component
public class MyHttpSessionListener implements javax.servlet.http.HttpSessionListener, ApplicationContextAware {

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (applicationContext instanceof WebApplicationContext) {
            ((WebApplicationContext) applicationContext).getServletContext().addListener(this);
        } else {
            //Either throw an exception or fail gracefully, up to you
            throw new RuntimeException("Must be inside a web application context");
        }
    }           
}

which means you can inject normally into the “MyHttpSessionListener” and with this, simply the presence of the bean in your application context will cause the listener to be registered with the container

More Related Contents:

  1. Autowiring in servlet
  2. Spring JSF integration: how to inject a Spring component/service in JSF managed bean?
  3. Injecting Mockito mocks into a Spring bean
  4. Spring @Autowire on Properties vs Constructor
  5. ContextLoaderListener or not?
  6. How to inject in @FacesValidator with @EJB, @PersistenceContext, @Inject, @Autowired
  7. Injecting a Spring dependency into a JPA EntityListener
  8. Setter DI vs. Constructor DI in Spring?
  9. Spring – Injecting a dependency into a ServletContextListener
  10. Spring DI – Autowired property is null in a REST service
  11. Spring: namespace vs contextConfigLocation init parameters in web.xml
  12. How to get the @RequestBody in an @ExceptionHandler (Spring REST)
  13. Spring injects dependencies in constructor without @Autowired annotation
  14. Where is the @Autowired annotation supposed to go – on the property or the method?
  15. No Spring WebApplicationInitializer types detected on classpath
  16. Spring injection Into Servlet
  17. What is difference between singleton and prototype bean?
  18. spring autowiring with unique beans: Spring expected single matching bean but found 2
  19. How does Spring annotation @Autowired work?
  20. Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
  21. Inject and Resource and Autowired annotations
  22. Dependency Injection in JSR-303 Constraint Validator with Spring fails
  23. Is there a static way to get the current HttpServletRequest in Spring
  24. Self injection with Spring
  25. How do I prevent people from doing XSS in Spring MVC?
  26. Get AOP proxy from the object itself
  27. How to access Spring-boot JMX remotely
  28. Where to handle Exceptions in Spring Applications
  29. Is it possible to invalidate a spring security session?
  30. How to add a custom health check in spring boot health?

Leave a Comment