[cdi-dev] [JBoss JIRA] (CDI-299) Consider removing @Vetoed on packages
Mark Struberg (JIRA)
jira-events at lists.jboss.org
Mon Nov 19 07:29:21 EST 2012
[ https://issues.jboss.org/browse/CDI-299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12735241#comment-12735241 ]
Mark Struberg commented on CDI-299:
Jozef, the reason why I brought this up in the EG meeting was because it's imo not that easy to do via bytecode scanning. At least not in a well performing way.
How does the scanning work:
you open one jar after the other, unzip it in memory and scan it. The problem now arises if you have the @Vetoed information in a jar which only gets scanned later.
I actually really like the feature, but currently we would need to do a classForName for each package (bypassing the bytecode level scanning). Basically it can't be done in a single pass!
There are 2 ways: either use some information in beans.xml as Jozef said. Or we could define the following: "If @Vetoed is used on a package and the same package exists in more than one classpath entries, non portable behaviour results."
A user could btw prevent this with an entry in a MANIFEST.MF file:
It will become trickier if we add the 'recursive' feature (which is imo also very useful) as there is no Java JAR-sealing for sub-packages.
> Consider removing @Vetoed on packages
> Key: CDI-299
> URL: https://issues.jboss.org/browse/CDI-299
> Project: CDI Specification Issues
> Issue Type: Bug
> Reporter: Pete Muir
> What happens when a package is split across jars? What about recursing into sub packages?
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