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From NetSQL <maill...@friendVU.com>
Subject Re: Optimistic locking strategy with iBatis
Date Sat, 02 Apr 2005 10:26:07 GMT
Just keep a copy of the orginial List of results fileds.
Then use them in you where clause.


Wulf, Andrew wrote:

> Before I figure it out the hard way, anyone have some pointers on 
> implementing an optimistic lock strategy with iBatis. The difficulty 
> is that we have nothing in the database (or can add anything) like a 
> version field or last update time. The current strategy in the home 
> grown persistance framework (which we will migrate hopefully to 
> ibatis) is to create a hash of the row contents and store it with the 
> value object, then on update reread the row (select for update on 
> primary key) compare the hashes and throw an exception if they don't 
> match. How best to do something similar with iBatis?
> - Andrew
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