public ValidationResult Run()
{
var scrapingCronSchedule = Environment.GetEnvironmentVariable(EnvironmentVariables.Scraping.CronSchedule);
if (string.IsNullOrWhiteSpace(scrapingCronSchedule))
{
LogMessage(
$"No scraping schedule was specified, falling back to default '{DefaultCronSchedule}' cron schedule...");
scrapingCronSchedule = DefaultCronSchedule;
Environment.SetEnvironmentVariable(EnvironmentVariables.Scraping.CronSchedule, scrapingCronSchedule);
}
try
{
CronSchedule.Parse(scrapingCronSchedule);
return(ValidationResult.Successful(ComponentName));
}
catch (Exception exception)
{
LogMessage(
$"No valid scraping schedule was specified - '{scrapingCronSchedule}'. Details: {exception.Message}");
return(ValidationResult.Failure(ComponentName,
$"No valid scraping schedule was specified - '{scrapingCronSchedule}'."));
}
}
private DateTime?GetNextDateTime()
{
try
{
DateTime nextTime;
var cs = CronSchedule.Parse(Expression);
cs.GetNext(DateTime.Now, out nextTime);
return(nextTime);
}
catch (Exception)
{
return(null);
}
}
public SchedulerHostedService(IEnumerable <IScheduledTask> scheduledTasks)
{
var referenceTime = DateTime.UtcNow;
foreach (var scheduledTask in scheduledTasks)
{
_scheduledTasks.Add(new SchedulerTaskWrapper
{
Schedule = CronSchedule.Parse(scheduledTask.Schedule),
Task = scheduledTask,
NextRunTime = referenceTime
});
}
}
public void UpdateCronObjects()
{
CloseTriggers();
var triggers = Dao.Query <Trigger>();
foreach (var trigger in triggers)
{
var dataContext = new CronObjectDataContext(new List <CronSchedule> {
CronSchedule.Parse(trigger.Expression)
})
{
Object = trigger,
LastTrigger = trigger.LastTrigger
};
var cronObject = new CronObject(dataContext);
cronObject.OnCronTrigger += OnCronTrigger;
_cronObjects.Add(cronObject);
}
_cronObjects.ForEach(x => x.Start());
}
public ValidationResult Run()
{
var scrapingCronSchedule = Environment.GetEnvironmentVariable(EnvironmentVariables.Scraping.CronSchedule);
if (string.IsNullOrWhiteSpace(scrapingCronSchedule))
{
Logger.LogWarning("No scraping schedule was specified, falling back to default '{ScrapeSchedule}' cron schedule...", DefaultCronSchedule);
scrapingCronSchedule = DefaultCronSchedule;
Environment.SetEnvironmentVariable(EnvironmentVariables.Scraping.CronSchedule, scrapingCronSchedule);
}
try
{
CronSchedule.Parse(scrapingCronSchedule);
return(ValidationResult.Successful(ComponentName));
}
catch (Exception exception)
{
Logger.LogError("No valid scraping schedule was specified ('{ScrapeSchedule}' - Exception: {Exception})", DefaultCronSchedule, exception);
return(ValidationResult.Failure(ComponentName, $"No valid scraping schedule was specified - '{scrapingCronSchedule}'."));
}
}
private CronObject CreateCronObject(Type newTaskType, string groupName, string cronExpression)
{
var cronSchedule = CronSchedule.Parse(cronExpression);
var cronSchedules = new List <CronSchedule> {
cronSchedule
};
var dc = new CronObjectDataContext
{
Object = new CronObjectHelper()
{
TaskType = newTaskType, GroupName = groupName
},
CronSchedules = cronSchedules,
LastTrigger = DateTime.Now
};
var cron = new CronObject(dc);
cron.OnCronTrigger += Cron_OnCronTrigger;
cron.OnThreadAbort += Cron_OnThreadAbort;
return(cron);
}