private List<UsageStatistic> retrieveApplicationUsage(ApplicationUsage usage, Date startDate, Date endDate) { log.debug("Determining application usage for application {}: dates {} -> {}", new Object[] {usage.getApplicationId(), startDate, endDate}); log.trace("Considering application usage events of {}: {}", usage.getApplicationId(), usage.getEvents()); UsageStatistic statistic = new UsageStatistic(ApplicationTransformer.statusFromLifecycle(current.getState()), usage.getApplicationId(), usage.getApplicationId(), format(eventStartDate), format(eventEndDate), duration, usage.getMetadata()); log.trace("Adding application usage statistic to response for app {}: {}", usage.getApplicationId(), statistic); result.add(statistic);