[jboss-dev-forums] [Design of JBoss jBPM] - Re: Failure handling

[kukeltje]

anonymous wrote : Less importantly, recursive evaluation causes resources to be tied up unnecessarily. I've seen posts on this forum complaining about a "memory leak in JBPM" - they perform a process loop a zillion times and watch the heap grow without bound. This would be silly as a production scenario, but it's a very typical kind of test to run. 

This is 'fixed' in the PVM (upcomming core of jbpm 4.0) Koen gave Tom some good spanking and in the meantime came up with a solution.

With regard to the discussion about exceptionhandlers  or the 'failure transitions', this is a hot topic in all processlanguages. I tried this once in a small test example where the actionhandler on getting an exception, did not throw it, but set a variable (which is possible if no exceptionhandlers are used). Transitions can be 'guarded' by expressions/conditions so the presence of a value in a certain variable can make the process leave on a certain transition. This can be decided upon designtime. On this leaving node you can e.g. use a compensating action that undo's previous actions. Kind of complex though, but that is the case with all (afaik) 'languages' like bpel, ebbp, bpmn etc. Maybe Tom or Alex could comment on this as well. 
 

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