Craig L Russell schrieb:
Hi Erik,
When you invoke makePersistent on a detached instance, the instance
must exist in the database. You don't insert it at commit.[..]
Does that mean that makePersistent() must not insert detached instances
for which it cannot find an object in the datastore?
In 12.6.7 it has "For a detached instance, they [the methods
makePersistent() and makePersistentAll()] locate /or create a persistent
instance/ with the same JDO identity as the detached instance, and merge
the persistent state of the detached instance into the persistent
instance."
I'm asking because our replication algorithm relies on that. Also I find
it confusing that the method most prominently used for inserting new
objects shouldn't do so for detached instances.
Craig
On Mar 8, 2006, at 7:14 AM, Erik Bengtson wrote:
Hi,
What happens when we invoke makePersistent on a detached instance
that was
deleted by another isolated process? I suspect that we raise an
exception
instead of reinserting it for a second time. Is that right?
Maybe this can be clarified in the spec.
Regards,
Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:[EMAIL PROTECTED]
P.S. A good JDO? O, Gasp!
