It's been suggested that this might be a reasonable approach, in order to minimize changes to an existing server configurations, but is it actually valid/supported? I've not been able to find anything specific either way.
In practice, with a JBoss Portal V2.4.2 server, there appears to be some class-loading issues, so things such as the downloadable Stripes example or a standard Wicket quickstart app don't run, but I'm not sure if the problem there is a server-specific one or a generic one - Anyone?
Note: This isn't about displaying/moving an existing web-app into a portal, simply if a Portal Server should also be a valid AppServer?
The answer is that yes, it is valid, but the specific JBoss Portal V2.4.* versions appear to have class-loader issues such that only the more basic web-apps will run correctly.