Re: Savepoint

Hello Franck,

Yipes.  Is this something that you really needed?  

I'm guessing as a way to recover from broken optimistic locking.  But that would not work -- there would be no way to correct the situation.

This sort of thing can lead to many issues, and needs thought.  What is your use case?

We should probably take care that if a flush() fails, then unflushed records remain in a state that they can be flushed again.  I have not looked, but should probably be the case already.

It should cost the same as clone(), as that it what it does.  And maybe clone would be more useful?

I see you have a test case, have not had a chance to look at it carefully.

But what is your use case?

Let us put Map to bed with a test case, and then have a review of aggregate, before adding too many more features.

Regards,

Anthony

At 02:23 AM 3/08/2009, you wrote:
>  
>
>Hi Anthony,
>
>I couldn't help but commit a new feature whose intent is to allow to
>recover a dataset after a rollback, without the cost of the clone()
>solution.
>
>If not used, the feature has no impact on the way simpleorm works, so I
>thought it was quite harmful...
>
>I called it savepoint, and the usage is:
>
>ses.begin(ds.savepoint());
>
>then, if 'ds.hasSavepoint()', you can:
>
>ses.rollbackAndDetachDataset();
>
>The tradeoff is that ds.savepoint() is quite costly, especially for big
>dataSets... (but should be less costly than clone()).
>
>Of course, comments are welcome !
>
>Franck
>
>


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