Opitimistic Lock with the PB API

[Arbona Vincent]

Hi,
 
I want to know how to use optimistic lock with the PB API.
 
I know that I have to put a "Lock Field" as integer or timestamp, but how OJB manage 
it?
 
When a record is considered as locked and when the lock is removed?
 
Thanks
 
 
Vincent ARBONA
Architecte Logiciel
 
Sopra Group
Espace Performance 3
Bâtiment P
35760 Saint Grégoire
 
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