Force JSF to refresh page / view / form when opened via link or back button -

i have jsf page posts data external page. data loaded jsf managed bean generates unique id in post data.

i have issue user clicks on checkout button navigates same page , presses checkout button again. post data has not updated. moreover, bean not invoked @ all. there anyway force jsf reload page , form data?

<form action="#{checkoutbean.externalurl}" method="post"     id="payform" name="payform">        <input type="hidden" value="#{checkoutbean.uniqueid}" />        <input type="submit" value="proceed checkout" /> </form> 

that page being loaded browser cache. harmless, indeed confusing enduser, because s/he incorrectly thinks it's coming server. can confirm looking @ http traffic monitor in browser's web developer toolset (press f12 in chrome/firefox23+/ie9+ , check "network" section).

you need tell browser not cache (dynamic) jsf pages. way browser request server page (and hereby triggering proper creation/initialization of managed beans , forth) instead of showing requested 1 cache.

generally, done simple servlet filter follows:

@webfilter("/app/*") public class nocachefilter implements filter {      @override     public void dofilter(servletrequest req, servletresponse res, filterchain chain) throws ioexception, servletexception {         httpservletrequest request = (httpservletrequest) req;         httpservletresponse response = (httpservletresponse) res;          if (!request.getrequesturi().startswith(request.getcontextpath() + resourcehandler.resource_identifier)) { // skip jsf resources (css/js/images/etc)             response.setheader("cache-control", "no-cache, no-store, must-revalidate"); // http 1.1.             response.setheader("pragma", "no-cache"); // http 1.0.             response.setdateheader("expires", 0); // proxies.         }          chain.dofilter(req, res);     }      // ... } 

where /app/* example url pattern on you'd turn off browser cache. can if necessary map on /*, *.xhtml or on servletnames={"faces servlet"}.

if happen use jsf utility library omnifaces, can use builtin cachecontrolfilter adding following entry web.xml (which demonstrates direct mapping on facesservlet, meaning every dynamic jsf page won't cached):

<filter>     <filter-name>nocache</filter-name>     <filter-class>org.omnifaces.filter.cachecontrolfilter</filter-class> </filter> <filter-mapping>     <filter-name>nocache</filter-name>     <servlet-name>facesservlet</servlet-name> </filter-mapping> 

see showcase.