How to use Time in Due Transition

Question

Hello All,
I have a requirement when I have to fire a due transition based on time. lets say midnight of a certain date
let assume the date is Jan 28, 2010 12:00:00 AM
how can i do it since the due transition needs an interval and not time.

Answer 1

If you're on Oracle BPM 10g or an earlier release of ALBPM, there are two ways to do this.
1. You could set your Due Transition's property set to "Schedule Based" and set it to some time in the future.
2. You could use logic to determine the time interval. The logic below assumes that you have a time in the future that you want to fire the Due transition on. Ignore the first two lines where I hard coded the date, they are just in there so you can test it. Similarly, do not code yours with the "display" statements - they are just in there so you can test it. A method like this just needs one incoming parameter - a time in the future (the "timeToFireDue" in the logic shown below). If it's a time in the future, then it will return a valid time interval to wait. If it's in the past, you could either set it to "null" to indicate to ignore the due transition or to '0s' as I've done below to cause the due transition to immediately fire when the work item instance reaches the activity. This logic could be either be in a BPM Object method or inside an Automatic activity upstream of the Due transition. Make the Due transition's property setting "IntervalExpression".
date1 as String = "30-Jun-2010 12:01"
timeToFireDue as Time = SimpleDateFormat("dd-MMM-yyyy HH:mm").parse(date1)
timeIntervalToWait as Interval
// it's in the future
if timeToFireDue.minutes > 'now'.minutes then
    minutesInFuture as Int = timeToFireDue.minutes - 'now'.minutes
    timeIntervalToWait = Interval(minutesInFuture + "m")
else
    // it's in the past so fire the due transition
    timeIntervalToWait = '0s'
end
minutesInFuture as Int = timeToFireDue.minutes - 'now'.minutes
display minutesInFuture
timeIntervalToWait = Interval(minutesInFuture + "m")
display timeIntervalToWait Dan