Comp150CPA: Clouds and Power-Aware Computing
Classroom Exercise 19
group member 1: ____________________________ login: ______________
group member 2: ____________________________ login: ______________
group member 3: ____________________________ login: ______________
group member 4: ____________________________ login: ______________
group member 5: ____________________________ login: ______________
In class we described Event/Condition/Action modeling as the basis
for use of Free Force.com. Let's explore this more.
- Suppose a business sells cleaning services. A customer asks for
a cleaning job on a specific day, after which a manager assigns a staff
member to do the job. The staff member either does the cleaning and
fills out a time card, or does not show up and reports the task as not
done. The manager bills the customer, as appropriate, after which
the billing department sends a bill. Model the state transitions
for one job as an ECA state transition diagram.
- Describe the profiles for people in the scenerio above and what
they should be able to do.
- Describe a data format for a job with appropriate state information
to maintain state and allow each profile to change state
appropriately without interfering with the state changes for other profiles.
It is possible to specify a datatype that has a limited list of
options, e.g., one could define a variable "state" that only takes the
values "accepted", "scheduled", "done", "paid", etc.
In a profile-based access scheme, is this a good idea? Why or why not?