Geir Magnusson Jr. wrote:
> So running classlib tests w/ DRLVM w/ the change to URLClassloader works
> *except* I have one consistent problem. I get 68 errors, all the same :
>
> java.util.MissingResourceException: Could not load data
> com.ibm.icu.impl.data.BreakIteratorRules
> ...
>
> Now, we do hide the bootloader's "com.ibm.icu.", but I think all is well
> there because it's only one single class we're having a problem with.
> Does anyone have any insight why this one class is problematic?
Do you see who is asking for the load? i.e. by setting a breakpoint
where you throw the CNF exception, then find it's classloader etc...
> The impl module comments for brevity here looks like this :
>
> protected synchronized Class<?> loadClass(String className,
> boolean resolveClass) throws ClassNotFoundException {
>
> if (this == getSystemClassLoader()) {
>
> int index = className.lastIndexOf('.');
>
> if (index > 0) {
> String pkgName = className.substring(0, index + 1);
>
> if (pkgName.startsWith("java.") ||
> pkgName.startsWith("javax.") ||
> pkgName.startsWith("org.ietf.jgss.") ||
> pkgName.startsWith("org.omg.") ||
> pkgName.startsWith("org.w3c.") ||
> pkgName.startsWith("org.xml.sax.")) {
> return super.loadClass(className, resolveClass);
> }
>
> /* if we get this far, use list of verboten */
>
> String[] verboten = VMUtil.getAppDeniedSysloaderPackages();
The answer isn't going to change at runtime, you could pull it out of
the loop since we want loads to be as fast as possible.
> for (String pkg : verboten) {
> if (pkgName.startsWith(pkg)) {
> throw new ClassNotFoundException();
Add className arg to show which is being denied.
> }
> }
> }
> }
> return super.loadClass(className, resolveClass);
> }
>
>
> Where VMUtil.getAppDeniedSysloaderPackages() (a name I will change
> before checkin) returns :
>
> deniedList = {
> "mx4j.",
> "org.apache.bcel.",
> "com.ibm.icu.",
> "com.ibm.icu4jni",
> "org.apache.xalan",
> "org.apache.xml",
> "org.apache.xpath"};
Consider adding all the trailing periods, though in these cases you are
probably safe.
Regards,
Tim
