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https://issues.apache.org/jira/browse/OPENJPA-952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697769#action_12697769
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Milosz Tylenda commented on OPENJPA-952:
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Don't we have some of this functionality already in the InstrumentationFactory
class? If so, we could try to reuse it.
> Utilize Sun JDK's Attach API to dynamically load the OpenJPA enhancer agent
> ---------------------------------------------------------------------------
>
> Key: OPENJPA-952
> URL: https://issues.apache.org/jira/browse/OPENJPA-952
> Project: OpenJPA
> Issue Type: Improvement
> Components: kernel
> Affects Versions: 2.0.0
> Environment: Sun 1.6 JDK.
> Note: The Attach API is ONLY a part of the JDK, not the SDK.
> Reporter: Rick Curtis
> Attachments: OPENJPA-952.patch, OPENJPA-952.patch
>
>
> When running in a JSE environment, OpenJPA could use the Attach API to
> dynamically load the enhancer agent at runtime. Dynamically loading the
> enhancer means that an OpenJPA developer doesn't need to configure a
> -javaagent. Doing this would dramatically improve the out of box performance,
> and also improve the ease of use.
> This improvement has the following caveats:
> 1.) This API is ONLY a part of the 1.6 JDK.
> 2.) This API is supported by only the Sun JDK.
> 3.) If the agent is loaded from the earliest OpenJPA code, the agent will be
> laoded when creating an EntityManager in the EntityManagerFactoryImpl. If an
> Entity class is loaded by the JVM before the enhancer agent is loaded, that
> class' byte code will not be enhanced.
> Attach API -
> http://java.sun.com/javase/6/docs/technotes/guides/attach/index.html
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