How do you invoke an Action prior to an initial page?

Is there a mechanism in JSF that allows action code to run prior to the first page?
Basically I want to do some processing in the context of JSF before displaying the initial application page.
In Struts I was able to do this by defining an action-mappings action that referenced an action class, and from that action I could forward to another action-mappings action that was a JSP.

This seems rather complicated and is not straight-forward. I need something similar: Before the first Render Response phase of a view I'd like my application to process any parameters that were passed via a non-faces GET request and set up my application and the JSF components appropriately. In other words, instead of the initial Restore View -> Render Response I'd like to have the full sequence of Restore View -> Apply Values -> Process Validations -> Update Model Values -> Invoke Application -> Render Response.
For example, depending on the request parameters I'd like to forward the request to one or the other JSF view. And I cannot do that in the Render Response phase because doing it The Faces Way is only possible in the Invoke Application phase - which is not invoked upon a view's initial use.

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How do you invoke an Action prior to an initial page?

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