some days ago i focused on the problem "how to prevent the user pressing twice or even more times the enter button or clicking a button several times" in a jsf form. In my tests the problem only come's up with IE and hitting enter some times. This problem is also discussed in [http://forums.sun.com/thread.jspa?threadID=665472] or in [http://book.javanb.com/the-java-developers-almanac-1-4/egs/javax.servlet.jsp/myformts.jsp.html-l=new.htm].
However, the client side solutions don't work very good, especially preventing enter seems to be a hard problem. I'am wondering if somebody has got a very good working server side solution. I'am actually testing a solution where i render a time token in the form and save this in an Stateful Session EJB Vector list. First request is passed (time token is saved in list), all subsequent request are blocked because the time token is already saved in the list. This works so far that only one request saves data. But i have got still 2 problems. - Concurrent access on the jsf (session scoped) backing bean leads to unpredictable errors. - Which response should i send back to the browser on blocked requests. Any idea?? Is there perhaps a good solution in the jsf framework?? ___________________________________________________________ GRATIS für alle WEB.DE Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de
