listener 등록

- 등록
https://www.baeldung.com/httpsessionlistener_with_metrics

http://theblasfrompas.blogspot.com/2016/08/httpsessionlistener-with-spring-boot.html?m=1

@Bean
public ServletListenerRegistrationBean<HttpSessionListener> sessionListener() {
    return new ServletListenerRegistrationBean<HttpSessionListener>(new SessionListener());
}

위의 방법은 spring-session사용시 적용 안됨


- @WebListener
https://www.techgeeknext.com/spring-boot-session-listener