private async Task Init(CMMNExecutionContext executionContext, TimerEventListener elt, CancellationToken token)
{
var currentDateTime = DateTime.UtcNow;
var elapsedTime = ISO8601Parser.ParseTime(elt.TimerExpression.Body);
var repeatingInterval = ISO8601Parser.ParseRepeatingTimeInterval(elt.TimerExpression.Body);
if (repeatingInterval != null)
{
if (currentDateTime >= repeatingInterval.Interval.EndDateTime)
{
return;
}
var startDate = currentDateTime;
if (startDate < repeatingInterval.Interval.StartDateTime)
{
startDate = repeatingInterval.Interval.StartDateTime;
}
var diff = repeatingInterval.Interval.EndDateTime.Subtract(startDate);
var newTimespan = new TimeSpan(diff.Ticks / (repeatingInterval.RecurringTimeInterval));
for (var i = 0; i < repeatingInterval.RecurringTimeInterval; i++)
{
currentDateTime = currentDateTime.Add(newTimespan);
var newInstance = elt;
if (i > 0)
{
newInstance = executionContext.Instance.TryCreateInstance(elt) as TimerEventListener;
}
await TrySubscribe(executionContext, newInstance, CMMNConstants.ExternalTransitionNames.Occur, token);
await _messageBroker.ScheduleExternalEvt(CMMNConstants.ExternalTransitionNames.Occur,
executionContext.Instance.AggregateId,
newInstance.Id,
currentDateTime,
token);
}
}
if (elapsedTime != null)
{
if (currentDateTime >= elapsedTime)
{
return;
}
await TrySubscribe(executionContext, elt, CMMNConstants.ExternalTransitionNames.Occur, token);
await _messageBroker.ScheduleExternalEvt(CMMNConstants.ExternalTransitionNames.Occur,
executionContext.Instance.AggregateId,
elt.Id,
elapsedTime.Value,
token);
}
}
public virtual DateTime?Evaluate(HumanTaskDefinitionDeadLine deadLine, BaseExpressionContext expressionContext)
{
DateTime?nextUTC = null;
if (!string.IsNullOrWhiteSpace(deadLine.Until))
{
var interval = ISO8601Parser.ParseTimeInterval(deadLine.Until);
if (interval != null)
{
nextUTC = interval.EndDateTime;
}
}
if (nextUTC == null && !string.IsNullOrWhiteSpace(deadLine.For))
{
nextUTC = ExpressionParser.GetDateTime(deadLine.For, expressionContext);
}
return(nextUTC);
}
