Jesse,

Why exactly would you need long transactions? And what do you exactly mean with 
it? Can you give an example?
Normally the transactions in jBPM are not long at all, they only serve to 
calculate the new state of the process instance after giving one or another 
token the signal to move on. To make these transactions long running, you would 
have to develop a node or an action that invokes long running operations. But 
you have to realize that, as the calculations of the new state are executed in 
the client thread, this would freeze your client application. The workaround 
for this is to use asynchronicity, but then (at least for jBPM) you don't have 
long running transactions anymore.

Regards,
Koen

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