Am 12.05.2016 um 15:17 schrieb Alan Bateman:
On 12/05/2016 09:49, wzberger wrote:
We provide libs for Swing and JavaFX. For most of the issues bug
reports have been filed. But it's not only about known bugs we also
have to handle unknown bugs - the release cycles until things get
fixed are way too long while customers need solutions. So will it be
possible to fork specific JDK modules and deploy such modified
modules to users in a simple manner - webstart included?
With OpenJDK then you can of course do your own builds. The
java.desktop module is not an upgradeable module (not like the EE
modules) so you can't deploy an upgraded version of java.desktop on
the upgrade module path, at least not with Oracle JDK builds. You can
patch it via -Xpatch for testing or debugging purposes but I assume
you don't want your users doing that. This reminds to ask - when you
patch the code today then you are using -Xbootclasspath/p or does
patching mean using core reflection to access/change private fields.
Java Web Start is not in OpenJDK so I can't comment on patching that
(or maybe you mean having web start download patches?).
Finally, and I understand it can frustrating to hit a bug that isn't
fixed in a timely manner, but have you considered contributing fixes
for the bugs that you are running into?
-Alan
Workarounds are mostly implemented via reflection - some features are
provided by extending internal classes. A widely spread example is
customization of a JTable header renderer by extending
sun.swing.table.DefaultTableCellHeaderRenderer - it's a pretty common
approach which is often used in the wild. We also extend
sun.swing.DefaultLookup and require access to
sun.swing.plaf.synth.DefaultSynthStyle - of course this is more
specific. So what's the recommendation, should we file a bug report to
provide a public API for these kind of classes and if so will these
classes find their way into the public API?
Because of contributing fixes, if things are simple and clear enough we
propose fixes. More complex fixes or extensions would require extra
resources which is currently not an option.
- Wolfgang
