public void generateDemoData()

in use-cases/employee-scheduling/src/main/java/org/acme/employeescheduling/bootstrap/DemoDataGenerator.java [78:124]
39 lines of code
6 McCabe index (conditional complexity)

    public void generateDemoData(@Observes StartupEvent startupEvent) {
        final int INITIAL_ROSTER_LENGTH_IN_DAYS = 14;
        final LocalDate START_DATE = LocalDate.now().with(TemporalAdjusters.nextOrSame(DayOfWeek.MONDAY));

        ScheduleState scheduleState = new ScheduleState();
        scheduleState.setFirstDraftDate(START_DATE);
        scheduleState.setDraftLength(INITIAL_ROSTER_LENGTH_IN_DAYS);
        scheduleState.setPublishLength(7);
        scheduleState.setLastHistoricDate(START_DATE.minusDays(7));
        scheduleState.setTenantId(EmployeeScheduleResource.SINGLETON_SCHEDULE_ID);

        scheduleStateRepository.persist(scheduleState);

        Random random = new Random(0);

        int shiftTemplateIndex = 0;
        for (String location : LOCATIONS) {
            locationToShiftStartTimeListMap.put(location, List.of(SHIFT_START_TIMES_COMBOS[shiftTemplateIndex]));
            shiftTemplateIndex = (shiftTemplateIndex + 1) % SHIFT_START_TIMES_COMBOS.length;
        }

        if (demoData == DemoData.NONE) {
            return;
        }
        List<String> namePermutations = joinAllCombinations(FIRST_NAMES, LAST_NAMES);
        Collections.shuffle(namePermutations, random);

        List<Employee> employeeList = new ArrayList<>();
        for (int i = 0; i < 15; i++) {
            Set<String> skills = pickSubset(List.of(OPTIONAL_SKILLS), random, 3, 1);
            skills.add(pickRandom(REQUIRED_SKILLS, random));
            Employee employee = new Employee(namePermutations.get(i), skills);
            employeeRepository.persist(employee);
            employeeList.add(employee);
        }

        for (int i = 0; i < INITIAL_ROSTER_LENGTH_IN_DAYS; i++) {
            Set<Employee> employeesWithAvailabitiesOnDay = pickSubset(employeeList, random, 4, 3, 2, 1);
            LocalDate date = START_DATE.plusDays(i);
            for (Employee employee : employeesWithAvailabitiesOnDay) {
                AvailabilityType availabilityType = pickRandom(AvailabilityType.values(), random);
                availabilityRepository.persist(new Availability(employee, date, availabilityType));
            }

            generateShiftsForDay(date, random);
        }
    }