Re: Imports

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Mon Feb 18 2008 - 19:18:13 EST

  • Next message: Malcolm Edgar: "Re: Imports"

    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 <ar..sh.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
    >>
    >>
    >> -------------------------->
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    >>
    >>
    >>
    >



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