Synchronization in Web Dynpro JAVA

Hi All,

I have a Web Dynpro JAVA application, for which an iView has been created and is assigned to a role. Now I have the below requirement,

If two users tries to access this application at the same time then the second user has to get a message stating that "A user is already accessing this application please try later". Basically the thread concept. Is it possible to achieve this in Web Dynpro JAVA. If yes please provide me some pointers on how to achieve this.

Thanks & Regards,

Vishweshwara