Marshall, I cant close https://issues.apache.org/jira/browse/UIMA-1531 yet.
Over the weekend I've discovered why the Logger ignores uima
formatter defined in Logger.properties and logs entries using the default
formatter (xml). It turns out that the java LogManager uses system
classloader to load the formatter class. Here is the method where this magic
occurs:
Formatter getFormatterProperty(String name, Formatter defaultValue) {
String val = getProperty(name);
try {
if (val != null) {
Class clz = ClassLoader.getSystemClassLoader().loadClass(val);
return (Formatter) clz.newInstance();
}
} catch (Exception ex) {
// We got one of a variety of exceptions in creating the
// class or creating an instance.
// Drop through.
}
// We got an exception. Return the defaultValue.
return defaultValue;
}
It surprising that that this java component silently ignores errors. Since
the uima formatter class is not loaded into the system classloader by the
UimaBootstrap, the LogManager returns a default formatter from the method
above.
I dont know how to fix this problem yet. One possibility is to change
UimaBootstrap to load jars/classes into the system classloader. Another
possibility is to load this one class into the system classloader although
I've failed trying to do this. I attempted to augment
the system classloader using reflection to inject a new URL like so:
URL url = new
URL("jar:file:/C:/uima/releases/2.3.3-04/apache-uima/lib/uima-core.jar!/java/util/logging/XMLFormatter.class");
Class[] parameters = new Class[]{URL.class};
URLClassLoader sysloader = (URLClassLoader)
ClassLoader.getSystemClassLoader();
Class sysclass = URLClassLoader.class;
try {
Method method = sysclass.getDeclaredMethod("addURL", parameters);
method.setAccessible(true);
method.invoke(sysloader, new Object[]{url});
} catch (Throwable t) {
t.printStackTrace();
throw new IOException("Error, could not add URL to system
classloader");
}//end try catch
Again, for some reason this doesnt work.I can inject jar files into the
system classloader using the above technique but not individual classes from
jars.
Jerry
On Sun, Oct 18, 2009 at 4:22 PM, Marshall Schor <m...@schor.com> wrote:
> Hi everyone,
>
> I'm "itching" to get the 2.3.0 release done.
>
> Of the issues that are open, reopened, or in-progress, most are now
> being deferred to past this release.
>
> The ones left that may need to be worked on before the release is done
> include:
>
> (Joern) UIMA-1619 <https://issues.apache.org/jira/browse/UIMA-1619>
> Clarify that a Cas Editor Project is required to use the Cas Editor in
> the documentation <https://issues.apache.org/jira/browse/UIMA-1619>
> (Eddie) UIMA-1611 <https://issues.apache.org/jira/browse/UIMA-1611>
> UimacppServiceControlled need to implement isStopped()
> <https://issues.apache.org/jira/browse/UIMA-1611>
> (Marshall) UIMA-1539 <https://issues.apache.org/jira/browse/UIMA-1539>
> Update READMEs for 2.3.0 release
> <https://issues.apache.org/jira/browse/UIMA-1539>
> (Jerry) UIMA-1153 <https://issues.apache.org/jira/browse/UIMA-1153>
> thread safety issue with sample flow controller
> AdvancedFixedFlowController
> <https://issues.apache.org/jira/browse/UIMA-1153>
> (Eddie) UIMA-1038
> <https://issues.apache.org/jira/browse/UIMA-1038>setUimaClasspath.sh
> should export library paths for interoperability with UIMA C++
> <https://issues.apache.org/jira/browse/UIMA-1038>
> (Jerry) UIMA-1531
> <https://issues.apache.org/jira/browse/UIMA-1531>Need a script to launch
> a UIMA-AS service via RunWithJarPath
> <https://issues.apache.org/jira/browse/UIMA-1531>
> (Jerry) UIMA-1484 <https://issues.apache.org/jira/browse/UIMA-1484>
> Update UIMA-AS Documentation
> <https://issues.apache.org/jira/browse/UIMA-1484>
>
> Could the people in (parenthesis) take the lead in looking at these and
> try and close out these issues?
>
> Thanks! -Marshall
>
