On 29/11/2007, at 12:28 PM, Aristedes Maniatis wrote:
> * prePersist() is only useful as a place to set object attributes
> (such as creationDate) since you cannot follow relations reliably in
> a ROP environment.
> * postUpdate() and postPersist() are useful for changes which do not
> need to be committed atomically with the original commit. So good
> for creating log records, but not ideal for updating invoiceOwing.
> * postPersist() is badly named. It is really postInsert()
> * we need preInsert()
With some further reading of the JPA specification I have come to the
* the JPA was written by lawyers who get paid by the word
* postPersist() is defined in the JPA to occur after a NEW record is
written to the database. Which is how Cayenne works.
* pre/postUpdate(): the JPA specification is very very unclear, but it
looks like maybe it might apply for both new and existing records. But
then postUpdate() overlaps postPersist() which is a bit pointless.
* if preUpdate() is just for existing records we still need a
So, even though we have to follow the poorly named callbacks in JPA,
an extra callback would fill a useful hole.
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