In case you've missed Christian's latest release of SmartNSF, here is the link . Important addition is the Custom strategy, that allows you to define your own class to process the requests coming via route defined in SmartNSF, such as

router.GET("info") {
    strategy(CUSTOM) {
        javaClass "org.openntf.rest.MyCustomStrategy"
    }
}

and your class needs to implement CustomRestHandler interface

package org.openntf.rest;

class MyCustomStrategy implements CustomRestHandler {
  public void processCall(Context context, String path) {
    JsonJavaObject result = new JsonJavaObject;
    result.put("test", "hello there!");
    JsonWriter jsw = new JsonWriter(context.getResponse().getWriter(), true);
    jsw.outObject(result);
    jsw.close();
  }
}

Happy RESTing|