LoginListener.java

package no.dusken.aranea.admin.listener;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationListener;
import org.springframework.security.authentication.event.AuthenticationSuccessEvent;
import org.springframework.security.core.userdetails.UserDetails;

/**
 * @author Benjamin Bjørnseth <benjamin@underdusken.no>
 */
public class LoginListener implements ApplicationListener<AuthenticationSuccessEvent> {
    private final Logger logger = LoggerFactory.getLogger(LoginListener.class);

    @Override
    public void onApplicationEvent(AuthenticationSuccessEvent successEvent) {
        Object principal = successEvent.getAuthentication().getPrincipal();
        if (principal instanceof UserDetails) {
            UserDetails details = (UserDetails)principal;
            logger.info(String.format("%s logged in", details.getUsername()));
        } else {
            logger.info(principal.toString());
        }
    }
}