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https://issues.apache.org/jira/browse/OPENJPA-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771761#action_12771761
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Albert Lee commented on OPENJPA-1306:
-------------------------------------
Outstanding issues resolved and clarified in the current level of the spec.
The current mixed lock manager is a super set implementation of the required
extended lock scope semantics, meaning requested pessimistic mode locks more
than required by the extended lock scope definition. There are a few usage
cases require additional locking to the join table in order to meet the
extended lock scope requirement. In other use cases, optimization can be
performed to minimize "un-needed" locks on relationship and collection elements
to improve concurrency. The later case is not required in order to be spec
compliance but can be considered as improvement in the future. All these
additional semantics will only be applied iff mixed lock manager (JPA2) is used
and extended lock scope is specified.
> Extended lock scope support
> ---------------------------
>
> Key: OPENJPA-1306
> URL: https://issues.apache.org/jira/browse/OPENJPA-1306
> Project: OpenJPA
> Issue Type: Sub-task
> Reporter: Albert Lee
> Assignee: Albert Lee
>
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