Not sure if anyone replied to this yet or not, so I'll throw my $0.02
into the discussion. I think all that is needed is to better allow
definition of what is to occur during replication in the method call.
For example, consider the changing the signature from accepting a
ReplicationMode to accepting a (new) "ReplicationStrategy", where
ReplicationStrategy is defined something like:
ReplicationStrategy {
/**
* How should we react when we encounter a pre-existing row
* in the target database?
* <p/>
* TODO: probably rename the ReplicationMode class to MergeMode
*/
public ReplicationMode getMergeMode() ...
/**
* When replicating an entity which does not yet occur in the
* target database, should we enforce that the target data
* we are about to create have the same identifier value?
*/
public boolean forceIdentiferRetention() ...
}
Also, there has been some discussion about moving the replicate
functionality from the Session interface to the StatelessSession
interface which would be a good point in time to introduce such changes.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Darryl Miles
Sent: Tuesday, August 01, 2006 12:47 PM
To: [email protected]
Subject: [Hibernate] Session.replicate() into IDENTITY table ?
A while ago I highlighted a problem with the differences between the
documented API and what Hibernate actually does and I'm seeking to an
open discussion about the merits and problems to renaming the current
#replicate() function to #replicateOrSave() to better identify what it
actually does.
This is so that a hole can be left open to implement a real #replicate()
function which makes contact guarantees that the primary key / OID will
be identical even in IDENTITY tables in the replicated object or
otherwise it throws an exception. There should also be a feature
enquiry function to allow the API programmer to ask the underlying
Hibernate implementation to verify if a replication on identity table
will work. This would account for JDBC driver vendors and versions and
the realtime SQL database server vendor and version.
http://www.mail-archive.com/[email protected]/msg052
30.html
http://forum.hibernate.org/viewtopic.php?t=949574&highlight=
http://www.hibernate.org/hib_docs/v3/api/org/hibernate/Session.html#repl
icate(java.lang.Object,%20org.hibernate.ReplicationMode)
RFC
Darryl
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