JSF 2 equivalent of IBM's hx:scriptCollector pre- and postRender - jsf

Question

I am migrating an old JSF application from WebSphere to JBoss: the old version uses an IBM implementation of JSF. My question concerns the following component:
<hx:scriptCollector id="aScriptCollector"
preRender="#{aBean.onPageLoadBegin}" postRender="#{aBean.onPageLoadEnd}">
To reproduce the preRender behavior in JSF 2 I use a binding for the form (s. here). My questions:
1) Do you know a trick for simulating postRender in JSF 2?
2) Do you think is the trick I am using for preRender "clean"?
Thanks a lot for your help!
Bye

Answer 1

Closest what you can get to achieve exactly the same hooks is
<f:view beforePhase="#{bean.beforePhase}" afterPhase="#{bean.afterPhase}">
with
public void beforePhase(PhaseEvent event) {
if (event.getPhaseId == PhaseId. RENDER_RESPONSE) {
// ...
}
}
public void afterPhase(PhaseEvent event) {
if (event.getPhaseId == PhaseId. RENDER_RESPONSE) {
// ...
}
}
The preRender can be achieved in an easier manner, put this anywhere in your view:
<f:event type="preRenderView" listener="#{bean.preRenderView}" />
with
public void preRenderView(ComponentSystemEvent event) {
// ...
}
(the argument is optional, you can omit it if never used)
There's no such thing as postRenderView, but you can easily create custom events. E.g.
#NamedEvent(shortName="postRenderView")
public class PostRenderViewEvent extends ComponentSystemEvent {
public PostRenderViewEvent(UIComponent component) {
super(component);
}
}
and
public class PostRenderViewListener implements PhaseListener {
#Override
public PhaseId getPhaseId() {
return PhaseId.RENDER_RESPONSE;
}
#Override
public void beforePhase(PhaseEvent event) {
// NOOP.
}
#Override
public void afterPhase(PhaseEvent event) {
FacesContext context = FacesContext.getCurrentInstance();
context.getApplication().publishEvent(context, PostRenderViewEvent.class, context.getViewRoot());
}
}
which you register in faces-config.xml as
<lifecycle>
<phase-listener>com.example.PostRenderViewListener</phase-listener>
</lifecycle>
then you can finally use
<f:event type="postRenderView" listener="#{bean.postRenderView}" />
with
public void postRenderView(ComponentSystemEvent event) {
// ...
}