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Date: Sun, 3 Apr 2011 05:36:05 +0000 (UTC)
From: "Patrick Linskey (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
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Subject: [jira] [Updated] (OPENJPA-1973) Unlocked field support
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     [ https://issues.apache.org/jira/browse/OPENJPA-1973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Linskey updated OPENJPA-1973:
-------------------------------------

    Attachment: OPENJPA-1973.patch

This patch implements this feature. Caveats:

1. I didn't even think about impact on data caching
2. The tests only cover basic field types. I expect the code works for relationship fields also, but did not test.
3. No docs
4. I didn't test / implement XML-based configuration -- @Unlocked is the only option currently.
5. I ran a few tests, and it seemed to pass, but I have not run a full test suite.

> Unlocked field support
> ----------------------
>
>                 Key: OPENJPA-1973
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1973
>             Project: OpenJPA
>          Issue Type: New Feature
>          Components: docs, jdbc, jpa
>            Reporter: Patrick Linskey
>            Assignee: Patrick Linskey
>         Attachments: OPENJPA-1973.patch
>
>
> Often, it's desirable to exclude certain fields from the optimistic locking computation. For example, if a PurchaseOrder's lastUpdatedDate field is updated every time a line item is added, it may be acceptable to simply use the latest value instead of requiring an optimistic lock check / collision.
> Let's add support for such fields.

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