Event Sequences in Three UseCases
- Request Elevator (Period = Tc)
- F1:@The Floor Buttons Interface receives and processes the interrupt.
- F2:@The Floor Buttons Interface sends gservice Requesth message to the Scheduler.
- F3:@The Scheduler receives message and interrogates Elevator Status & Plan object to determine whether an elevator is on its way to this floor. Assume not, so that the Scheduler selects an elevator.
- F4:@The Scheduler sends a gscheduler Requesth message identifying the selected elevator to the Elevator Manager.
- F5:@The Elevator Manager receives message and records destination in Elevator Status & Plan object.