Re: servlet - vice threadu pri vice requestech

Sat, 14 Jun 2008 06:06:13 -0700 

Dobry den,
zkusim svou otazku reformulovat. Mame jen jednu instanci servletu v kontejneru 
a s kazdym prichozim requestem se vytvori/vezme z poolu thread. Prijdou-li 
soucasne 2 requesty na jeden servlet, vytvori se 2 thready a oba thready volaji 
metody instance servletu. SingleThreadModel (nyni deprecated) zajisti to, ze 2 
thready nikdy nebudou volat soubezne metodu servletu. 

Muj pokus (priklad na vyse uvedenych strankach) mel smerovat k tomu, aby se  s 
vice prichozima requestama vytvorilo vice threadu a ty volaly soucasne metody 
instance servletu. Bohuzel se mi pokus chova presne tak, ze jsou requesty 
obsluhovany "pekne" sekvencne a cekaji na sebe.

Diky B.

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;

public class NewServlet extends HttpServlet {
    private int counter = 0;

    public void doGet(HttpServletRequest req, HttpServletResponse resp)  throws 
ServletException, IOException {
        doPost(req, resp);
    }

    public void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        resp.getWriter().println("<HTML><BODY>");
        resp.getWriter().println(this + ": <br>");
        for (int c = 0; c < 10; c++) {
            long l = (long) (Math.random() * 1000);
            resp.getWriter().println("Counter = " + counter + "(" + l + 
"ms)<BR>");
            try {                
                Thread.sleep(l);
                counter++;
            } catch (InterruptedException exc) {
            }
        }
        resp.getWriter().println("</BODY></HTML>");
    }
}

Odpovedet emailem