HuiSheng Xu [http://community.jboss.org/people/rebody] replied to the discussion

"Multi-threaded process execution?"

To view the discussion, visit: http://community.jboss.org/message/550901#550901

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Hi Chris,

Let jBPM 4 support real Multi-Thread will be a good research direction.  But 
please notice some thing.  That the IoC containter of jBPM 4 based on the 
TheadLocal,  so if you create Multi-Thread in your custom activity, you maybe 
have to face some problems, e.g. you cannot get components directly from 
Environment any more.  And the transaction interceptor should be rewrite for 
Multi-thread scenario, you have to find a way to notify the interceptor when 
all of executions have completed,  and whether the current transation could 
commit or should rollback.

So the current implementation of jBPM 4 based on the single-thread scenario 
could simplify many problem and easy to achieve.  if you really want to achieve 
a Multi-Thread solution,  please consider about these.

Good Luck. :) 

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