Hello

I use hibernate 2.1.2 version with IBM DB2 v7.2

Supose 1 object:
Object
field1 with "NONE"
field2 with "NONE"

Supose 2 transactions: (in disctinct threads)

tx1:open transaction1 with a new session
tx1:Read object with id 1
tx1:set object.field1 with "TXT1"
tx1:save object
tx2:open transaction2 with a new session
tx2:Read object with id 1
tx2:set object.field2 with "TXT2"
tx2:save object
tx1:commit transaction 1
tx2:commit transaction 2

what i get is the object 1 with field = "NONE" and field2= "TXT2".

Seems that saving and object is an atomic operation. Is it correct?

what i was especting for that situation is object 1 with field1="TXT1" and field2 with "TXT2".
It possible to do hibernate work like this?


Thank you for your patience.

dynamic-update="true"

You could also use versioning, see http://www.hibernate.org/hib_docs/reference/html/transactions.html#transactions-s3

When using versioning, committing tx2 in your example would fail.

if his second tx fails, he will not have field2 with "TXT2"...

Yes, that was my point. In some cases it might be useful to now the state of the entire object. Say, if the logic for setting field2 is something like:



Of course, if field2 is totally unrelated to the state of the rest of the object and locking is not needed, using dynamic-update would be a better solution.

Hello,

dynamic-update=true satisfies my necessities

Thank you for your responses