Need Help: Servlet2Cgi or Servlet2Somewhat communication

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Hi there,

i made a servlet in java which should now be extended with some new financial calculations. But i won't integrate them in the servlet directly because it could be decompiled easily (using e.g. decafe) and there are no obfuscators out there able to protect java code properly.
If posible i would code the new core in pb and then call it from the servlet. Does anyone have an idea how to do this? Maybe as a cgi, but as i read in the forum there ist no solution for cgi on linux till now.

If anyone got some experience with servlets and pb or some idea please tell me.

(sorry if my english sounds a little bit rusty)