[equinox-dev] Use of Thread Context ClassLoader considered harmful?

["Michael Furtak" <mfurtak@xxxxxxx>]

Hi all,

I am using Apache XMLBeans 2.4 within Equinox 3.5, and am running into
problems. Specifically, I (and others [1,2] - references at bottom) have
noticed that a specific part of the type resolution process breaks when
run in an OSGi environment.

After some investigation, I have found that XMLBeans is creating its
SchemaTypeLoader objects with the current thread's context
classloader[3]. My experience has been that any time a library does this
and then needs to load classes that are in a different OSGi bundle, the
classes can not be resolved.

So I suppose my questions are: Could Equinox do more to prevent this
kind of use-case from breaking down? Alternatively, for compatibility
with an OSGi environment, is using a TCCL considered harmful? If so,
what should I suggest in my XMLBeans ticket as an OSGi-compatible
alternative?


Thanks,
-Mike Furtak
 

1)
http://markmail.org/message/vx2vdg7yhb4l3ej6#query:+page:1+mid:vx2vdg7yh
b4l3ej6+state:results

2)
http://mail-archives.apache.org/mod_mbox/ws-axis-user/200701.mbox/%3C8d2
a81130701171341p55f95b70o7f144ea7d941639a@xxxxxxxxxxxxxx%3E

3)
http://grepcode.com/file/repo1.maven.org$maven2@org.apache.xmlbeans$xmlb
eans@2.4.0@org$apache$xmlbeans$impl$schema$SchemaTypeLoaderImpl.java#Sch
emaTypeLoaderImpl.getContextTypeLoader%28%29 (Line 131)
 
 
 
 
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