java - How to enable session and set session timeout in Spring Security

Question

I am new to Spring Security and I am working on a login, logout, and session timeout feature. I have configured my code by referring to this document. My code looks below:

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.authorizeRequests().antMatchers("/admin/**")
        .access("hasRole('ROLE_USER')").and().formLogin()
        .loginPage("/login").failureUrl("/login?error")
            .usernameParameter("username")
            .passwordParameter("password")
            .and().logout().logoutSuccessUrl("/login?logout").and().csrf();
    http.sessionManagement().maximumSessions(1).expiredUrl("/login?expired");
}

Override the class AbstractSecurityWebApplicationInitializer

import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;

public class SpringSecurityInitializer extends AbstractSecurityWebApplicationInitializer {

    @Override
    public boolean enableHttpSessionEventPublisher() {
        return true;
    }

}

I need clarification on whether I am doing it right, if it looks good, then where I need to setup the session timeout. I am doing it fully based on annotation.

Answer 1

If you are using JavaConfig and do not want to use XML you can create a HttpSessionListener and use getSession().setMaxInactiveInterval(), then in the Initializer add the listener in onStartup():

public class SessionListener implements HttpSessionListener {

    @Override
    public void sessionCreated(HttpSessionEvent event) {
        System.out.println("session created");
        event.getSession().setMaxInactiveInterval(15);
    }

    @Override
    public void sessionDestroyed(HttpSessionEvent event) {
       System.out.println("session destroyed");
    }
}

Then in the Initializer:

@Override
public void onStartup(ServletContext servletContext) throws ServletException {
    super.onStartup(servletContext);
    servletContext.addListener(new SessionListener());
}