How to invoke action before a view is rendered

There is a new component since JSF2.0 & JSF2.1 that can invoke a listener at the defined type of JSF event.
If is <f:event />

To invoke action/listener before a view is rendered,
The type event to be used is preRenderView

and this event type is available since JSF2.1

eg,

<f:event type="preRenderView" listener="#{myBean.preRenderViewListener}" />

with the above sample code, #{myBean.preRenderViewListener} will be invoked before the view is rendered.

another alternative to invoke an action during the body onload is with <p:remoteCommand />


Done!!