Responsible for detecting and processing file upload requests, using Jakarta Commons FileUpload.
Implementations of this service typically use the threaded service lifecycle model.
Decodes the request, returning a new
javax.servlet.http.HttpServletRequest implementation that will allow access to the form fields submitted in the request (but omits
uploaded files).
Parameters: request - The incoming servlet request decoded http request
Parameters: parameterName - Name of the query parameter associated with the uploaded file a file upload with the given name, or null if no such file upload was in the request.