HttpServletRequestReadOnly

Read-only immutable wrapper for an HttpServletRequest that can, for the most part, be passed around to different threads.

This is necessary because ServletContainers will "recycle" a request once the original HTTP thread is returned, meaning that a lot of attributes are set to null (in the case of Jetty).

Limitations of this class include the following:

• it is mostly immutable (methods on the original request are not given stable values, nor are methods that return non-primitive types)
• changes made to the original object or this object may not be reflected across threads