first pass at what my sinatra-like java servlet would look like

gistfile1.java

import org.sinatraLikeServlet.*;

public class MyApplication extends SinatraLikeHTTPServlet {
    @get("/")
    public void index(SinatraLikeHTTPServletRequest req
		      SinatraLikeHTTPServletResponse resp) {
	MyResource[] resources = MyResource.findAll();
	req.setAttribute("resources", resources);
    }

    @get("/:id")
    public void show(SinatraLikeHTTPServletRequest req
		     SinatraLikeHTTPServletResponse resp) {
	String myResourceId = request.getParameter("id");
	MyResource resource = MyResource.find(myResourceId);
	req.setAttribute("resource", resource);
    }

    @get("/:id")
    @provides("json")
    public String show(SinatraLikeHTTPServletRequest req
		       SinatraLikeHTTPServletResponse resp) {
	String myResourceId = request.getParameter("id");
	MyResource resource = MyResource.find(myResourceId);
	return resource.toJson();
    }
}

Did this ever see the light of day? Would love to be able to use this on a project.

It didn't actually. This was just a "proposed" API. I showed it to a friend who was more well-versed in Java Servlets and he said he wanted to take a stab at it, but I don't think he ever did. I would love to see this become a reality though.