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Quartz Triggers re-firing before the last Job has completed execution...

 
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I've configured a Quartz scheduler using Spring ContextLoaderListener. Everything is working fine, but I'm having a problem with Trigger "overlap".

When Trigger X fires, it kicks off Job X. IF Trigger X fires again, before Job X is complete, Job X will launch again, creating all sorts of race conditions, concurrency issues, Hibernate Sessions closing, dogs and cats living together in sin, etc.

How can I tell Trigger X to not launch the job, if the Job is already running?

I thought this was related to Trigger misfires, but apparantly that's something else entirely unrelated...

Help!
 
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My guess is that you want to implement a TriggerListener, and provide an appropriate vetoJobExecution method to enforce the behaviour you want. See:

Quartz Tutorial Lesson 7

Guy
 
Philippe Desrosiers
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This is pretty much exactly what I was looking for. Just thought the functionality might be built-in...

Thanks Guy!
 
It is sorta covered in the JavaRanch Style Guide.
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