Scheduling - Using cron property

AverageMonitor.java

@Component
public class AverageMonitor {

  private static final Logger LOG = LoggerFactory.getLogger(AverageMonitor.class);
  private final EventRepository eventRepository;
  private final AverageRepository averageRepository;

  public AverageMonitor(
      final EventRepository eventRepository, final AverageRepository averageRepository) {
    this.eventRepository = eventRepository;
    this.averageRepository = averageRepository;
  }

  @Scheduled(cron = "0/20 * * * * ?")
  public void publish() {
    final double average =
        eventRepository.getAverageValueGreaterThanStartTime(
            "An event type", LocalDateTime.now().minusSeconds(20));
    averageRepository.save(
        new Average(new AverageKey("An event type", LocalDateTime.now()), average));
    LOG.info("Average value is {}", average);
  }
}