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https://issues.apache.org/jira/browse/JDO-735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15555583#comment-15555583
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Craig L Russell commented on JDO-735:
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I think the isClosed method only makes sense if there are resources associated
with the object. In the context of Extent and Query, the only resources are the
iterators and result sets. And if close and closeAll are idempotent, there is
no reason for the isClosed method. If you want to free resources, call close or
closeAll.
And I don't think that close should make the object unusable. What value do we
add by making the Extent or Query unusable?
> Make PersistenceManager and Query support AutoCloseable (JDK1.7+)
> -----------------------------------------------------------------
>
> Key: JDO-735
> URL: https://issues.apache.org/jira/browse/JDO-735
> Project: JDO
> Issue Type: New Feature
> Components: api, specification, tck
> Reporter: Andy Jefferson
> Assignee: Michael Bouschen
> Fix For: JDO 3.2
>
> Attachments: CloseWithActiveTxRollsBack.java
>
>
> So then it can be used with JDK1.7+ try-with-resources, as per
> http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html
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