tests/run_jetty6/src/main/java/MainServlet.java

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class MainServlet extends HttpServlet {

    public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.getWriter().println("Hello!");
        response.setStatus(200);
    }
}