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https://issues.apache.org/jira/browse/JDO-597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622979#action_12622979
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Andy Jefferson commented on JDO-597:
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The log entry "2) Id "org.apache.jdo.tck.pc.company.Company$Oid: 1" has not
determined to the class"
suggests that the OID class (passed in to pm.getObjectById) is not known about,
and indeed it is a custom PK class and "Company" has not been mentioned during
that PMF2's existence, so no metadata is loaded at that point. Consequently
DataNucleus has no way of knowing what (persistable) class this PK class refers
to and so cannot find the object. Perhaps if you did a
pm.getExtent(Company.class) first (to give the implementation knowledge and
hence load the metadata) then it would get the object from the id
> PMF : Add "readOnly" setting for better handling of read-only datastores
> ------------------------------------------------------------------------
>
> Key: JDO-597
> URL: https://issues.apache.org/jira/browse/JDO-597
> Project: JDO
> Issue Type: New Feature
> Components: api2, api2-legacy, specification
> Reporter: Andy Jefferson
> Assignee: Andy Jefferson
> Fix For: JDO 2 maintenance release 2
>
> Attachments: JDOReadOnlyException.patch
>
>
> A user has a datastore that is outside their control and they either don't
> have permission to write to it, or maybe they have permissions but don't want
> to write to it. They want a better way of handling this, preventing updates
> to the datastore.
> Propose :-
> PMF property (with setter/getter)
> javax.jdo.option.ReadOnly - values true | false
> JDOReadOnlyException extends JDOUserException
> Behaviour :-
> When readOnly is set to true :-
> Any operation resulting in a creation/modification of an object to be sent to
> the datastore should throw a JDOReadOnlyException. This may be at commit(),
> flush(), or alternatively at makePersistent() when using datastore txns, or
> query.deletePersistentAll(). That is, no change should be made to the
> datastore contents at all.
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