Listener from cloud configuration changes and do something

CloudConfiguration.groovy

@Component
@ConfigurationProperties(prefix="authorization")
class CloudConfiguration {

    String secretKey

    boolean dirty = true

    @Autowired
    SignedJwtTokenGenerator tokenGenerator

    @EventListener
    public void handleContextRefresh(ApplicationEvent event) {
        if( event instanceof EnvironmentChangeEvent) {
            dirty = event.keys.find { it == 'authorization.secretKey' }
        }
        if( event instanceof RefreshScopeRefreshedEvent && dirty ) {
            println "secretKey has been updated, refresh tokenGenerator "
            tokenGenerator.jwtSecret = secretKey
        }
    }
}