[hibernate-dev] How best to eliminate the Javassist dependency from Hibernate applications...

[Scott Marlow]

On 02/03/2016 09:01 AM, Steve Ebersole wrote:
> I should point out... The big drawback with that (and with cloning in
> general since its the Javassist package renaming that is important in
> both) is that its no longer a simple matter update (bug-fixes, etc)
> Javassist usage in Hibernate.  Its certainly no longer simple as in
> drop-in the replacement from upstream.

True, many users like to workaround Javassist issues by dropping a 
different Javassist version in.

>
> On Wed, Feb 3, 2016 at 7:58 AM Steve Ebersole <steve at hibernate.org
> <mailto:steve at hibernate.org>> wrote:
>
>     Just as a suggestion, we do not need to go to a "full on" clone for
>     your (1).  A fat-jar, shaded-jar, <your favorite plugin here> should
>     also do the trick.
>
>
>     On Wed, Feb 3, 2016 at 7:54 AM Scott Marlow <smarlow at redhat.com
>     <mailto:smarlow at redhat.com>> wrote:
>
>         As modular classloading environments become more popular (e.g.
>         WildFly,
>         OSGi, Openjdk Jigsaw), it is more important that applications can
>         include their own version of Javassist classes.  This is not
>         possible if
>         the application classpath also needs to include the Hibernate
>         (needed)
>         version of Javassist.
>
>         My question is how would/should this be accomplished?  Some
>         proposals
>         are below:
>
>         1.  Clone the Javassist runtime classes into Hibernate ORM and
>         maintain
>         them as a fork.  I don't think this is practical but still wanted to
>         mention it as a possible solution.
>
>         2.  Stop using the parts of the Javassist api that generate bytecode
>         that depends on the Javassist runtime classes.  I have no idea
>         how hard
>         this would be.
>
>         I don't think we have a jira for this yet, although we have
>         talked about
>         it occasionally for years.
>
>         Any volunteers to help?
>
>         Scott
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