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https://issues.apache.org/jira/browse/OPENJPA-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679653#action_12679653
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Dianne Richards commented on OPENJPA-885:
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In testing the new function in this JIRA, I've run into a problem that I could
use some input for. First, let me explain what I'm doing. There are 4
compatibility options (identified in a previous post). We need to change the
default values for openjpa only, without affecting other derived products. So,
I've put code in the PersistentProductDerivation to retrieve the Compatibility
instance and set the new default values for openjpa.
In my unit test, I initially changed these individual values in my test code,
by retrieving the Compatibility instance and using the appropriate setter
method, and things worked fine. But, when I specified a change using a
property, ex: openjpa.Compatibility=default(flushBeforeDetach=false), the other
3 default values reverted to the original values, not the ones that I set in
the PPD.
Here's what I discovered through running the debugger: THe
OpenJpaConfigurationImpl.fromProperties() is called to store the new
properties. this calls PluginValue.setString(). This has the following code:
if (_singleton)
set(null, true)
which effectively changes the _value from the current Compatibility object to
null. Thus, when the next getCompatibilityInstance() method is called, a new
object is instantiated, with the original default values. Is this a bug? Are
there other properties that this could happen to in the future? ANy suggestions
on how to fix this without breaking things?
> Support clear methods on EntityManager, including new CascadeType.CLEAR
> ------------------------------------------------------------------------
>
> Key: OPENJPA-885
> URL: https://issues.apache.org/jira/browse/OPENJPA-885
> Project: OpenJPA
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: Dianne Richards
> Assignee: Dianne Richards
> Fix For: 2.0.0
>
> Attachments: patch.txt
>
>
> Support the 2.0 new EntityManager clear() methods. Also support the new
> CascadeType.CLEAR.
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