I just did some tests in my playground project and realized it’s actually possible to keep the state of the flash parameters even if you GET the page again, using {flash.keep}. That’s how the JSF docs explain it: The implementation must ensure the proper behaviour of the flash is preserved even in the case of … Read more
The Mojarra’s implementation of the JSF2 Flash scope had a lot of problems. Most of them were resolved with every new Mojarra release. Currently, with the latest Mojarra version, the 2.1.6, there’s as far as I know still only one major open problem: it won’t work if you redirect to a different base path. See … Read more
In short, variables stored in the flash scope will survive a redirection and they will be discarded afterwards. This is really useful when implementing a Post-Redirect-Get pattern. If you try to navigate to another page by redirect and access the attributes on load, they will be there. After that request is done the values in … Read more