integration with java's threading

I saw that Bordeaux threads uses a very thin layer of java threads in their
abcl implementation file.

I wanted to use some libraries from java that use threading fairly heavily
(web apis) and was wondering if there had been good testing with exchanging
data from the lisp layer to the java layer when threading is heavily used
in the java layer. For example, passing xml and json s-expr into java for
processing and sending out through a multi-threaded environment i.e. akka
actors.