If you're rewriting everything to a common location, you would typically do something like this:
ProxyPass / http://localhost:8080/foo/
ProxyPassReverse / http://localhost:8080/foo/
If you need different rules for different paths, you would probably use the Proxy flag on a series of RewriteRules:
RewriteRule /bar/(.*) http://localhost:8080/foo/app/bar/$1 [P]
RewriteRule /api/qux/(.*) http://localhost:8080/foo/api/qux/$1 [P]
RewriteRule /quux/(.*) http://localhost:8080/foo/quux/$1 [P]
RewriteRule /(.*) http://localhost:8080/foo/app/$1 [P]
The this will send things to the appropriate place in Tomcat.
The only complication is if the application dynamically generates URLs with fully qualified paths. In this case, you need to either fix the application, or use something like mod_proxy_html to rewrite links in your HTML content.
Best Answer
I assume that you are trying to move
http://www.domain.com:8080/AppNametohttp://www.domain.com/without the trailing AppName. In that case, you may want to consider running a reverse proxy in front of Tomcat. Merely switching the port from port 8080 to 80 would still require you to access your app viahttp://www.domain.com/AppName.Apache can be configured to do this. You will just need to set up mod_proxy with the following config:
You can also do this with other web-servers such as lighttpd or nginx and what nots, basically most reverse proxies can do it in one form or another.