public IEnumerable <JobExecutionRecord> FindHistory(string nodeName, string jobKey)
        {
            var id = ScheduledRunHistory.ToId(nodeName, jobKey);

            return(_history[id].Records);
        }
        public void RecordHistory(string nodeName, string jobKey, JobExecutionRecord record)
        {
            var id = ScheduledRunHistory.ToId(nodeName, jobKey);

            _history[id].Append(record, 100);
        }