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From "Malcolm Edgar" <malcolm.ed...@gmail.com>
Subject Re: Imports
Date Tue, 19 Feb 2008 09:31:47 GMT
Great! Thanks for that.

regards Malcolm Edgar

On Feb 19, 2008 11:18 AM, Andrus Adamchik <andrus@objectstyle.org> wrote:
> Just use your own transactions, then 'commitChanges' turns into 'flush':
>
> http://cayenne.apache.org/doc/understanding-transactions.html
>
> Andrus
>
>
> On Feb 18, 2008, at 7:49 AM, Malcolm Edgar wrote:
>
> > Hi Ari,
> >
> > thanks for the response.  This would be a very good 3.0 feature if it
> > is not already present.
> >
> > In Hibernate this functionality is performed as a flush operation,
> > where CRUD operations are performed against the transaction but are
> > not actually committed.
> >
> > Would this would cause issues with Cayenne PK generation strategy, are
> > the highest/last table id values they maintained in memory?
> >
> > regards Malcolm Edgar
> >
> > On Feb 18, 2008 3:16 PM, Aristedes Maniatis <ari@ish.com.au> wrote:
> >>
> >> On 18/02/2008, at 2:07 PM, Malcolm Edgar wrote:
> >>
> >>> Is there a way in Cayenne, possibly using Transactions, that we can
> >>> perform this import, do inserts and queries against the transaction
> >>> and only commit/rollback at the end?
> >>
> >> Subclass the Cayenne context, override performQuery and add in your
> >> own custom code there to look for new objects within the context?
> >> There is almost certainly a way to have a database transaction cross
> >> several Cayenne commits as well, but I can't assist there.
> >>
> >> In fact we've done this several times in our application and I was
> >> just thinking the other day whether this might be an option in a new
> >> generified performQuery and might be useful to be pushed into
> >> Cayenne.
> >>
> >>
> >> Ari Maniatis
> >>
> >>
> >> -------------------------->
> >> ish
> >> http://www.ish.com.au
> >> Level 1, 30 Wilson Street Newtown 2042 Australia
> >> phone +61 2 9550 5001   fax +61 2 9550 4001
> >> GPG fingerprint CBFB 84B4 738D 4E87 5E5C  5EFA EF6A 7D2E 3E49 102A
> >>
> >>
> >>
> >
>
>

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