[jboss-user] [jBPM] - jBPM- Transaction isolation level

[HuiSheng Xu]

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

"jBPM- Transaction isolation level"

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Hi Alexander,
 Commonly, jBPM 4 used optimistic lock to prevent concurrent thread modify the same record in database.  When there were splited execution need to be merged, e.g. in the JoinActivity, jBPM 4 used LockMode.UPGRADE to lock the parent execution. It is means that it will send a SQL likes 'select * from T for update' to lock a record in database and prevent other thread modify this line.

  So, if you want to do some integration work, you should consider about using optimistic lock.

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