OBIEE automatic redirect to a Dashboard via mod_rewrite

Normally end users would like to have a simple URL access for Oracle Business Intelligence Enterprise Edition (OBIEE) 11g like http://webhost:7777 and than to be automatically redirected to their Dashboard, instead of typing endless complex URL's. Assuming you have following standard implementation of an OBIEE environment which contains an Oracle HTTP Server (OHS) configured with mod_wl_ohs to be proxied to point to your WebLogic Server hosting...