Running only one instance of a quartz Job at a time

[yaishb]

Hi,

I want to activate the quartz scheduler in a spring container, but since the duaration of execution is not fixed (not even close) I need a constraint that will ensure that no other instance of that job is fired if another has not finished, How do I do that?

Can I control at runtime the scheduling policy i.e. change the quartz cron expression?

Thanks,

Barak.

[karldmoore]

There is some discussion of this in the Quartz tutorial, e.g. StatefulJobs.
http://www.opensymphony.com/quartz/w...alLesson3.html