appserver HelloWorld Servlet

Servlet.php

<?php
// file /opt/appserver/webapps/hello/WEB-INF/classes/nix/Hello/Servlet.php

namespace nix\Hello;

use AppserverIo\Psr\Servlet\Annotations\Route;
use AppserverIo\Psr\Servlet\Http\HttpServlet;
use AppserverIo\Psr\Servlet\Http\HttpServletRequestInterface as Request;
use AppserverIo\Psr\Servlet\Http\HttpServletResponseInterface as Response;

/**
 * @Route(name="hi", urlPattern={"/hi.do"})
 */
class Servlet extends HttpServlet
{
    public function doGet(Request $request, Response $response)
    {
        $response->appendBodyStream("Hello from servlet!");
    }
}

error: appserver stderr | [2018-12-26 18:38:13] - 1fe5dbbb9d3f (error): exception 'Doctrine\Common\Annotations\AnnotationException' with message '[Semantical Error] The annotation "@AppserverIo\Psr\Servlet\Annotations\Route" in class nix\Hello\Servlet does not exist, or could not be auto-loaded.' in /opt/appserver/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/AnnotationException.php:54