Comp150CPA: Clouds and Power-Aware Computing
Classroom Exercise 15 Answers
BPNM and BPEL
group member 1: ____________________________ login: ______________
group member 2: ____________________________ login: ______________
group member 3: ____________________________ login: ______________
group member 4: ____________________________ login: ______________
group member 5: ____________________________ login: ______________
In class we have described BPMN and BPEL.
Let's explore BPMN in a bit more detail.
- Draw a BPMN diagram for the business process of showing up at
random times to try to catch your advisor in his or her office, to get
an advising approval.
I wrote the answer in the Eclipse BPMN editor, and then
selected "File/Save as image file..." to create a .jpg.
Several finer points:
- Every subprocess has a begin and end statement, and a potential
- A clock annotation on a subprocess indicates a timeout.
- Negotiation about schedule is depicted as a pair of subprocesses,
- Draw a BPMN diagram for logging into SIS and checking your
grades, including the time limitation that SIS is not available
between 6-8 pm every night.
I did not depict repeated logins or repeated tries to get
transcript. The time dependency can be represented by an event
or a gate. I chose a gate because it is a bit easier to read.
Few people know that between 6-8 pm, SIS does sometimes allow you to
login, but won't show you anything! This is the behavior that I depicted.
- (Advanced) Why is it impossible to translate a BPMN diagram
into a BPEL diagram automatically?
Answer: The BPMN diagram is missing many details, including
how long to wait for timing events, bindings of services, etc.