Hello,

I am trying to run an example about transactions using timeout ... and i was surprised when i ran the code ...

Using another transaction manager, like jotm, bitronix, the time-out from a user transaction do the following

timeout := X seconds

ut start

action 1

action 2

action 3

ut commit

if error ... ut rollback

if action1 or action 2 o action 3 are into the period of X seconds , they will not executed ... for example ... if action 1 got a lot of time, more than timeout, then,

action 2 and action 3 never been executed ... right ...

But, using jboss-user transaction, ... the time-out exception is throwed when action 3 finished !!!! ... the following sample shows my problem ..

package paq;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

import javax.annotation.Resource;
import javax.ejb.ApplicationException;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceUnit;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.transaction.UserTransaction;

public class Tiempo extends javax.servlet.http.HttpServlet implements
javax.servlet.Servlet {

private static final long serialVersionUID = 8150995692542819134L;

@Resource
private UserTransaction ut;

protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {

response.setContentType("text/html");
 PrintWriter out = response.getWriter();

 try {
 out.write(" " + new Date());
 ut.setTransactionTimeout(1);
 ut.begin();
 Thread.sleep(3000);
 out.write(" " + new Date());
 out.write("->1" + ut + " ");
 Thread.sleep(3000);
 out.write(" " + new Date());
 out.write("->2" + ut + " ");
 Thread.sleep(3000);
 out.write(" " + new Date());

 ut.commit();
 }

 catch (Exception e) {
 out.write(" " + new Date());
 out.write(" Excepcion:=" + e);
 }
}
}

The exception from time-out is throwed after 9 seconds !!!! nooo ... i need it al least at 2 seconds !! and never run the hole of transaction ...

why do i need to run a completed tx when the first is broken into a timeout !!!

if my transaction has 3 operations and a timeout is 4 hours , 1.- spends 1 hour, 2.- spends 1 hours , 3.- spends 2 hours ... if i got a problem and the first one and second need 4 hours to finish, i don't want to wait another 2 hours to recieve the time-out exception !!!

how can i resolve it

thank you