Conditional Timer Boundary Event

[shashank-yelluri]

Hello @ralphhanna,

Is there anyway that we can make the timer boundary event to work based on the conditions. Say, i have one field in the data, "priority". Based on the type, i want to escalate, if the priority is "low", escalate after 4 days or if it is high, then escalate it in a day. Is there anyway we could achieve this ? That escalation of timer boundary event should trigger the service task to send out a mail. If you have any reference .bpmn file that you could share, that would be great for the understanding purpose.

Thanks a lot in advance.

[ralphhanna]

Hello,
I have added the following to the documentation for future reference:

Timer Expression

• Timer value can be a text string like PT30S or can be a JavaScript Expression $appServices.getTimerDelay(this)

    <bpmn2:boundaryEvent id="Event_0hx26qc" cancelActivity="false" attachedToRef="Activity_0cijuru">
      <bpmn2:timerEventDefinition id="TimerEventDefinition_0hwwvzf">
        <bpmn2:timeDuration xsi:type="bpmn2:tFormalExpression">$appServices.getTimerDelay(this)</bpmn2:timeDuration>
      </bpmn2:timerEventDefinition>
    </bpmn2:boundaryEvent>

In this case it is calling an appServices.ts method:

    getTimerDelay(item) {
        // item passed is that of the boundary event
        // need to find parent item
        const parentItem = item.token.parentToken.currentItem;
        const priority= parentItem.priority;
        if (priority === 'high') {  
            return 'PT5S'; // 5 Seconds ISO 8601 duration format
        } else if (priority === 'medium') {
            return 'PT10S'; // 10 Seconds ISO 8601 duration format
        } else if (priority === 'low') {
            return 'PT15S'; // 15 Seconds ISO 8601 duration format
        }
    }

The full bpmn file is here
timer-expression.zip