sap4rails

Hello, I need to integrate my Rails app with SAP back-end. I found this library sap4rails, which apperenty is meant to help, but I see that the library has not been modified since 07, and wonder if it is up-to- date.

http://raa.ruby-lang.org/project/sap4rails

Does anyone have experience working with this library and is it a good solution for Rails and SAP integration? Any relevant tips please.