The specific answer is no, the book doesn't cover topics like this--it's pretty application- and environment-specific.
The broader answer would be that this type of data generally goes into the application context, which is then available through a plain old
Java map to actions that implement ApplicationContextAware.
If you want to inject specific application-scoped objects into an action you'd probably want to create a custom interceptor that checks for marker interfaces (or annotations) and upon finding them injects the appropriate objects via setters.
Dave