public void Run()
        {
            if (_status != JobStatus.Scheduled)
            {
                // Do nothing. Work is already started.
                return;
            }
            _status = JobStatus.Running;
            _lastStartTime = _context.GetCurrentTime();
            _definition.Factory().ContinueWith(t =>
            {
                _status = JobStatus.Pending;
                _lastCompleteTime = _context.GetCurrentTime();

                var run = new JobRun
                {
                    Started = _lastStartTime.Value,
                    Completed = _lastCompleteTime.Value
                };

                if (t.Status == TaskStatus.Faulted)
                {
                    var ex = t.Exception.Flatten().GetBaseException();

                    run.Result = JobRunResult.Failure;
                    run.ResultMessage = ex.ToString();

                    // We need to log this out.
                    //_trace.Value.Error("Command " + cmdKey + " failed to execute.\r\n" + ex.Message, new { Exception = ex, Command = cmd });
                }
                else if (t.Status == TaskStatus.RanToCompletion)
                {
                    run.Result = JobRunResult.Success;
                }

                _previousRuns.Add(run);

                var newWorkState = new WorkState(_lastCompleteTime.Value);

                _context.State.Store(_definition.JobKey, newWorkState);
            });
        }