[rfc][icedtea-web] PR1251: Hack for appcontext & event-queue classloaders

Jiri Vanek jvanek at redhat.com
Fri Apr 5 07:02:34 PDT 2013

On 04/04/2013 10:17 PM, Adam Domurad wrote:
> This puts a bandaid over http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1251. 'Fix' is probably too generous.
> With this, the SweetHome3D JNLP [1] runs again. The applet version had worked before.
> This is explicitly *not* wanted for HEAD. I am posting this for review now to be considered for any release branches where a proper fix is not found. (1.4 definitely, who knows maybe even previous & future releases. But such hackery should not be in HEAD.)
> 2013-XX-XX Adam Domurad <adomurad at redhat.com>
> Hack to ensure AppContext is set correctly.
> * netx/net/sourceforge/jnlp/Launcher.java
> (forceContextClassLoaderHack): Force stored class-loader for
> thread-group's AppContext and EventQueue to be our JNLPClassLoader.
> (createApplet): Call forceContextClassLoaderHack.
> (createAppletObject): Call forceContextClassLoaderHack.
> (createApplication): Call forceContextClassLoaderHack.
> I have not found any potential problems this may cause (and I've digged quite deep). Let me know of any concerns.
> [1] www.sweethome3d.com/SweetHome3D.jnlp
> Happy hacking,
> -Adam

Hi! Thanx for this.

Can you write (point to) more information about the (possible) patch for head?

Anyway I agree this is hack. When 1.4 is branched, I'm ok for this to push to it. Anyway It will need some focus during 1.4 release regression testing  to be sure we have not broken anything....
Btw - changes like this NEEDS reproducers.  The rule from wiki[1] is not obeyed those times too offten. The development of ITW have speed up a lot now, but we are loosing a testcoverage a bit :(

[1] http://icedtea.classpath.org/wiki/CommitPolicy#OpenJDK_Patches
"IcedTea-Web code changes/new feature should be accompanied with appropriate tests (JUnit class and/or reproducer). If no tests are added/modified, changes should be accompanied with an explanation as to why. "


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