Advanced Queuing - Oracle

Use Case Diagrams
Use Case Diagrams
In a use case diagram, the primary use case is instigated by an actor (stickman),
which can be a human user, an application, or a subprogram. The actor is connected
to the primary use case, which is depicted as an oval (bubble) enclosing the use case
action, as shown in Figure E–1.
Figure E–1 A Primary Use Case
Primary use cases may require other operations to complete them. In Figure E–2,
specify queue name
is one of the suboperations, or secondary use cases, needed to complete
ENQUEUE a message
The downward lines from the primary use case lead to the other required
operations (not shown).
Figure E–2 A Primary Use Case with Suboperations
User/
Program
User/
Program
DELETE
the row
AQ Operational Interface
ENQUEUE
a message
specify
queue name
E-2 Oracle9i Application Developer’s Guide - Advanced Queuing