How the Web Changed Things
Presentation server ? Web server
All requests have to pass through a Web server
- Each Web server needs sessions to all DB servers
- At least one DB session per active Web server
- So session reduction by workflow control is still useful
Workflow control layer is still useful for other request mgmt functions …
- Calling Start, Commit, and Abort
- Encapsulating business rules that transform each request into calls on basic objects