How to rollback tx in Seam JPA

[sherkan777]

Hi,
Is this good approach to commit and roolback transaction after failure in Seam JPA on tomcat?

     public boolean authenticate() {
          boolean ret = false;
         try {
              .....
              getEM().getTransaction().commit();
          } catch(Exception e) {
               identity.logout();
               if (getEM().getTransaction().isActive())
                    getEM().getTransaction().setRollbackOnly();
          }
          return ret;
     }