Here is one more web architecture I have worked on:
One major requirement was the application should support mobiles/other
devices. The application should also be extensible or flexible to
changes in technology choices.
Presentation Tier:
Business Service Tier:
Spring @Service (Can change to Stateless EJB)
Data Access Tier:
Spring @Repository (Can change to Stateless EJB)
Resource Tier:
Hibernate(JPA) entities (Can change to any ORM)
You can find more information on the book which follows this architecture here.
