This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I am calling one application from the another application. Authentication will be done by the first application. How to provide Single Sign on and how to authenticate the second user from the first application. Both application are going to be deployed in the same web servers in two different instances.