Destroying view-scoped beans when session ends
glassfish, jakarta-ee, jsf, jsf-2, view-scope
Solution
Create a `@SessionScoped` bean to hold the resources (in some collection/array?) and inject it in the `@ViewScoped` bean and then rely on the `@PreDestroy` of the session scoped bean.
True, this way the resources live a little longer than you want, but that's the most easy and reliable solution you can get. If you want to keep the `@PreDestroy` in the view scoped bean, then you'd need to somehow make sure that the enduser always performs navigation by a HTTP POST request on exactly this view scoped bean. You can't reliably guarantee that (the enduser's PC might crash and so on).
Problem
My question is related to this one (and probably others): @PreDestroy never called on @ViewScoped As stated there, there's no trivial solution to either have view-scoped beans destroyed upon navigation and the same seems to hold true for when the session expires. What would a non-trivial approach to release (calling the `@PreDestroy` method) JSF view-scoped beans look like, or more specifically as soon as the session expires? I'm using Java EE 6 and Mojarra 2.1.x on GlassFish 3.1.2.