[logback-dev] MDC good concept but...Thread-Support

[peter huber]

  Hi LogBack-Team,

just want to tell you that MDC lacks thread support.
But I'm quite sure that you know that. As soon as you
"leave" a thread the MDC conext (ThreadLocal) will be
lost. 
I had implemented something similar to MDC a while ago
and I accompanied my impl with a
ContextPreservingRunnable after a while. 

Works like this

CTOR (Source Thread):
ContextPreservingRunnable(Runnable inSubject) {
   myMemento = MDC.getMemento();
   mySubject = inSubject;
}

RUN-Method (Target Thread):
void run() {
   MDC.setMemento(myMemento);
   mySubject.run();
   MDC.clear();
}

Even though it works for me, it's rather bad that you
have to wrap all Runnables and Callables respectively.

Maybe a ExecutorFacade might server the purpose?

BTW: Does MDC include support for a Subjects
Principals (JAAS)...Please forgive me my showing off
at dev list;-)




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