private async Task RunSingleTask(ITaskDefinition <TIdentifier> singleTaskDefinition, PreconditionEvaluator <TIdentifier> preconditionEvaluator, ImmutableList <ISchedule <TIdentifier> > schedules, ImmutableList <TaskPrecondition <TIdentifier> > preconditions, SessionRunResult <TIdentifier> sessionRunResult, DateTime startTime, Guid runId)
{
var taskSchedule = schedules.Single(candidateSchedule => EqualityComparer <TIdentifier> .Default.Equals(candidateSchedule.TaskDefinitionId, singleTaskDefinition.Id));
var history = historyReader.GetNew();
history.StartTime = startTime;
history.TaskDefinitionId = singleTaskDefinition.Id;
history.RunId = runId;
var runResult = default(SingleTaskRunResult);
var failingPrecondition = await preconditionEvaluator.GetFailingPrecondition(singleTaskDefinition, preconditions);
var allPreconditionsPassed = string.IsNullOrEmpty(failingPrecondition);
if (allPreconditionsPassed)
{
try
{
runResult = await runner.RunAsync(singleTaskDefinition);
}
catch (Exception e)
{
await faultHandler.HandleAsync(singleTaskDefinition, e);
runResult = new SingleTaskRunResult
{
Succeeded = false,
Remarks = e.Message,
};
}
finally
{
if (taskSchedule.IsOnDemand)
{
onDemandQueueManager.DeQueue(taskSchedule.TaskDefinitionId);
}
}
history.Remarks = runResult.Remarks;
history.Status = runResult.Succeeded ? RunHistoryStatuses.CompletedSuccessfully : RunHistoryStatuses.Failed;
}
else
{
history.Remarks = $"Precondition '{failingPrecondition}' failed";
history.Status = RunHistoryStatuses.PreconditionPreventedRun;
}
history.EndTime = taskSchedule.LastRun = DateTime.Now;
sessionRunResult.Histories = sessionRunResult.Histories.Add(history);
sessionRunResult.Schedules = sessionRunResult.Schedules.Add(taskSchedule);
}
