Extending Timers

[andrealuciano71]

I need to customize the behaviour of Timer Start Events in order to schedule a process according to a predefined calendar which contains some exclusions such as holidays etc.

Which might be the best approach in Activiti BPM?

[vasile_dirla]

Maybe the cycle with cron expressions will fit your needs?
Here you can find the documentation about the cron expressions:
http://www.quartz-scheduler.org/documentation/quartz-1.x/tutorials/crontrigger

[andrealuciano71]

Thank you for the advice, but the situation is made more complex by the fact that the dates to skip are stored in a database.
I was wondering if there was a neat solution in Activiti different either from editing the Engine source code or from writing a custom scheduler, such as an example based on quartz, to start my process.

[jbarrez]

A possible way could be to look into how Activiti calculates the next due date of a job: using an implementation of org.activiti.engine.impl.calendar.BusinessCalendar, and plugged in here: https://github.com/Activiti/Activiti/blob/master/modules/activiti-engine/src/main/java/org/activiti/...

[andrealuciano71]

OK, thank you, very interesting, I will follow your hint and explore this possibility.