jigsaw now sync'ed with jdk8-b23

[Mandy Chung]

Ludovic,

If I understand correctly, you get the NoClassDefFoundError
if you have this module-info.java (that doesn't have
"requires jdk.base"):

module lh.worldclock.application @ 0.7
{
   requires jdk.desktop;
   requires lh.worldclock.panel @ 0.7;
   class lh.worldclock.WorldClock;
}

There are two things on our todo list that are relevant
to this known issue.
1) jdk.desktop should re-export jdk.base so that
    your app only needs to say "requires jdk.desktop".
2) requires jdk.base will be synthesized by javac if not
    specifed in the module-info.java file [1]. Jon already
    has the javac change.  Once we get the jigsaw runtime
    change ready, we will push it to jigsaw forest and that
    will address this issue.

So for now, you would need to workaround it by specifying
"requires jdk.base" as you have done.

Thanks
Mandy
[1] http://cr.openjdk.java.net/~mr/jigsaw/notes/jigsaw-big-picture-01


On 2/2/2012 2:46 PM, Ludovic HOCHET wrote:
> Today's change fixed that issue, thanks, so I went on rechecking my 
> Worldclock toy application [1] and got:
> Exception in thread "main" java.lang.NoClassDefFoundError: 
> java/lang/Object
>     at java.lang.ClassLoader.defineClass1(Native Method)
>     at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
>     at 
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>     at 
> java.lang.module.ModuleClassLoader.defineClass(ModuleClassLoader.java:49)
>     at org.openjdk.jigsaw.Loader.finishFindingClass(Loader.java:240)
>     at org.openjdk.jigsaw.Loader.findClass(Loader.java:184)
>     at org.openjdk.jigsaw.Loader.loadClass(Loader.java:115)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>     at 
> sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
> Caused by: java.lang.ClassNotFoundException: java.lang.Object : 
> requested by +lh.worldclock.application
>     at org.openjdk.jigsaw.Loader.loadClass(Loader.java:113)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>     ... 9 more
>
> This seemed to call for a missing jdk.base, and indeed adding it fixed 
> the issue (along with doing the same in the panel as well as exporting 
> the required package).
>
> Is it now necessary to explicitely require jdk.base?
>
> Ludovic
>
> [1]: 
> http://lhochet.blogspot.com/2012/01/jigsaw-worldclock-with-maven-plugin.html
>
> On Wed, Feb 1, 2012 at 00:49, Mandy Chung <mandy.chung at oracle.com 
> <mailto:mandy.chung at oracle.com>> wrote:
>
>     On 1/31/2012 2:07 PM, Ludovic HOCHET wrote:
>
>         Hello,
>         I tried building the latest source, but I'm having the
>         following when
>         trying to launch jconsole:
>
>
>     Thanks for reporting it.
>
>         ludovic at jigsaw-vm:~/dev/jigsaw$ export
>         JIG=~/dev/jigsaw/build/linux-i586/jdk-module-image
>         ludovic at jigsaw-vm:~/dev/jigsaw$ $JIG/bin/java -m jdk.jconsole
>         Exception in thread "main" java.util.ServiceConfigurationError:
>         sun.java2d.pipe.RenderingEngine: Provider
>         sun.java2d.jules.JulesRenderingEngine not found
>
>
>     This depends on the services support that Alan is working on [1].
>       The service loader is not yet module-aware.  Prior to the module
>     views and exports change, all public types including
>     sun.java2d.jules.JulesRenderingEngine are exported and that's why
>     it was working previously.
>
>     sun.java2d.pipe.RenderingEngine calls ServiceLoader.loadInstalled
>     method to create a new service loader using the extension class
>     loader.  In module mode, there isn't any extension class loader
>     but instead it should use the caller's module loader.
>
>     Alan, what do you think to integrate the change you have in the
>     ServiceLoader class that uses the proper module loader in module
>     mode first?   I think that can be separated from the services work.
>
>     Mandy
>     [1]
>     http://mail.openjdk.java.net/pipermail/jigsaw-dev/2011-December/001819.html
>
>
>
>
> -- 
> Ludovic
> -----------------------------------------
>
> "Les formes qui differencient les etres importent peu
>  si leur pensees s'unissent pour batir un univers..."
>  Yoko Tsuno (in 'Les titans' by Roger Leloup)
>  [The shapes that differenciate beings are not important
>  if their thoughts unite to build a universe]
>