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From "Albert Lee (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-1306) Extended lock scope support
Date Fri, 30 Oct 2009 04:01:59 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771761#action_12771761
] 

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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