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Big Moose Saloon
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Joined: Oct 13, 2010
Nov 12, 2010 08:46:12
please some one clear my following doubt in concurrent transactions situation
1. 2 users open same database row to update ,say user 1 update a field RED and after a moment other user updates it to GREEN. user 1 changes will be lost .how to handle it in simple
i have read isolation levels dirty reads and all therotically but coldnot find some practical soultion.
i read that hibernatea appends some uid with each row to handle this but never saw this happening.
whats the solutions guys in jdbc and hibernate ??
Joined: Apr 14, 2004
Nov 12, 2010 08:59:51
Lost updates can be prevented by implementing optimistic locking. If its Hibernate you are using, I'd first google the term, then check out its documentation on versioning.
I agree. Here's the link:
subject: concurrent transactions
How to Update an Entity in the concurrent transactions?
Please comment on the application design
How to update string to Oracle Clob
Dirty Read / Dirty Write scenarios
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