Struts home page action in jsf - How ?

I have another question when i convert a struts app to JSF.

The home page of the struts app was home.do where the home action class was checking some parameter in header and accordingly forwarding to relevant jsp pages.

How do i execute a managed bean before going to any jsp page and from there decide where the user will be forwarded ? When i give <xyz.faces> as my home page, jsf takes it to <xyz.jsp>

[437 byte] By [gdfgfdgdfa] at [2007-10-3 5:14:52]