I have existing struts web application with Single Sign On. Then I'm going to create a different web application using spring framework. Then want to use the logged in user from struts app to link with new spring app.
Problem: I don't have any idea on how to automatically log in the logged user from struts app to my spring app.
Any guidance is appreciated.
Updates 1: the physical servers are located in the same place but it owns by two different company. However, we are connected and we called it as extranet. Its just like an intranet but in a wider range or network.
Updates 2: I have to add concerning the domain setup. http://www.abc.xxx1.ne.jp/
is the struts web app. http://server1.abc.apac.yyy1/springwebapp/
is the spring web app. It will be cross domain. I've heard from @edwardw that I need to choose federation
approach. Any guidance on how to deal with the said approach are highly appreciated.