@Target(value=TYPE)
@Retention(value=RUNTIME)
@Documented
public @interface WebListener

The annotation used to declare a listener for various types of event, in a given web application context.

The class annotated MUST implement one, (or more), of the following interfaces: HttpSessionAttributeListener, HttpSessionListener, ServletContextAttributeListener, ServletContextListener, ServletRequestAttributeListener, ServletRequestListener

E.g. @WebListener
public TestListener implements ServletContextListener {