metrics.Jobs[jobID] = job.metric()
		}
		return metrics
	}

	for id, job := range m.metrics {
		metrics.Jobs[id] = job.metric()
	}
	return metrics
}

// keep job metrics for some time after the job is completed
// in-case some one wants to look at the older results.
func (m *batchJobMetrics) purgeJobMetrics() {
	t := time.NewTicker(6 * time.Hour)
	defer t.Stop()