Week 12 [Fri, Oct 29th] - Topics
Guidance for the item(s) below:
As with the class/object diagrams, let us refresh our memory of the sequence diagrams notations that you learned in TIC2002.
Follow up notes for the item(s) above:
Now that you know the basic notations for the sequence diagrams, here is a worked example of drawing sequence diagrams (basic notation) to match a code snippet.
Guidance for the item(s) below:
Earlier, you learned the basic syntax used in sequence diagrams. Now, let's learn some intermediate syntax.
Can interpret sequence diagrams with parallel paths
UML uses par frames to indicate parallel paths.
Notation:
Logic is calling methods CloudServer#poll() and LocalServer#poll() in parallel.
If you show parallel paths in a sequence diagram, the corresponding Java implementation is likely to be multi-threaded because a normal Java program cannot do multiple things at the same time.
Can interpret sequence diagrams with reference frames
UML uses ref frame to allow a segment of the interaction to be omitted and shown as a separate sequence diagram. Reference frames help you to break complicated sequence diagrams into multiple parts or simply to omit details you are not interested in showing.
Notation:
The details of the get minefield appearance interactions have been omitted from the diagram.
Those details are shown in a separate sequence diagram given below.
Follow up notes for the item(s) above:
Here is a worked example of drawing sequence diagrams (intermediate notation) to match a code snippet.