[jboss-jira] [JBoss JIRA] (WFLY-10025) Use new org.jboss.modules.ClassTransformer interface instead of j.l.i.ClassFileTransformer

[Scott Marlow (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-10025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585254#comment-13585254 ] 

Scott Marlow commented on WFLY-10025:
-------------------------------------

Thanks for the example!  I'll start with adding org.jboss.modules.ClassTransformer but will also keep the java.lang.instrument.ClassFileTransformer implementation until we update DelegatingClassFileTransformer to support org.jboss.modules.ClassTransformer.

> Use new org.jboss.modules.ClassTransformer interface instead of j.l.i.ClassFileTransformer
> ------------------------------------------------------------------------------------------
>
>                 Key: WFLY-10025
>                 URL: https://issues.jboss.org/browse/WFLY-10025
>             Project: WildFly
>          Issue Type: Enhancement
>          Components: JPA / Hibernate
>            Reporter: David Lloyd
>            Assignee: Scott Marlow
>            Priority: Minor
>
> The JPA classes use {{java.lang.instrument.ClassFileTransformer}} for class transformation, however this style of transformer incurs an extra whole-byte-array copy when loading memory-mapped classes or using other resource loaders which operate on byte buffers.
> After the Modules 1.8.0.Final upgrade, switch to using {{org.jboss.modules.ClassTransformer}} instead.



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