//get jruby engine
        ScriptEngine jruby = new ScriptEngineManager().getEngineByName("jruby");

        //process a ruby file
        jruby.eval(new BufferedReader(new InputStreamReader(getClass().getResourceAsStream("/ruby/lti_outcome_util.rb"))));

        //call a method defined in the ruby source
        jruby.put("score", score);
        jruby.put("message_id", messageId);
        jruby.put("sourcedid", sourcedId);
        jruby.put("key", key);
        jruby.put("secret", secret);
        jruby.put("lis_outcome_service_url", lisOutcomeServiceUrl);

        String res =  (String) jruby.eval("postScore($score, $message_id, $sourcedid, $key, $secret, $lis_outcome_service_url)");