JavaServlet:强制init在Payara服务器上创建数据对象启动?

我正在寻找一种在第一个请求之前在我的java servlet(Payara上)中生成数据对象的方法,因为创建的数据对象需要一些时间来解析其他网站(大约4秒)。

我以为这就足够了

@WebServlet(urlPatterns = "/reports/*", loadOnStartup = 1)

在启动payara服务器时强制servlet容器初始化(基于 http://www.codejava.net/java-ee/servlet/webservlet-annotation-examples ).然而,它不起作用。对于第一个请求,我仍然有4秒的延迟,后续请求没有延迟。下面的代码可以工作,问题只是第一个请求的延迟。

@WebServlet(urlPatterns = "/reports/*", loadOnStartup = 1)
public class SingleReportServlet extends HttpServlet {

    ReportData m_myData;

    @Override
    public void init() throws ServletException {        
        m_myData = new ReportData(); //This takes about 4 seconds, once
        System.out.println("My servlet has been initialized");        
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        
        String requestPath = request.getPathInfo();
        String[] components = requestPath.split("/");
        String requestedData = components[components.length-1].trim().toUpperCase();
        String report = m_myData.getFullReport(requestedData, Locale.GERMAN, DisplayType.HTML_PARTIAL);
        String headline = "Report for "+requestedData;
        System.out.println(headline);
        System.out.println(report);         
        request.setAttribute("headline", headline);
        request.setAttribute("report", report); 
        request.getRequestDispatcher("/WEB-INF/singleReport.jsp").forward(request, response);       
    }    
}