BranchDayOfWeekOperator¶

使用 BranchDayOfWeekOperator 根据星期几的值对工作流进行分支。

airflow/example_dags/example_branch_day_of_week_operator.py[源代码]

empty_task_1 = EmptyOperator(task_id="branch_true")
empty_task_2 = EmptyOperator(task_id="branch_false")
empty_task_3 = EmptyOperator(task_id="branch_weekend")
empty_task_4 = EmptyOperator(task_id="branch_mid_week")

branch = BranchDayOfWeekOperator(
    task_id="make_choice",
    follow_task_ids_if_true="branch_true",
    follow_task_ids_if_false="branch_false",
    week_day="Monday",
)
branch_weekend = BranchDayOfWeekOperator(
    task_id="make_weekend_choice",
    follow_task_ids_if_true="branch_weekend",
    follow_task_ids_if_false="branch_mid_week",
    week_day={WeekDay.SATURDAY, WeekDay.SUNDAY},
)

# Run empty_task_1 if branch executes on Monday, empty_task_2 otherwise
branch >> [empty_task_1, empty_task_2]
# Run empty_task_3 if it's a weekend, empty_task_4 otherwise
empty_task_2 >> branch_weekend >> [empty_task_3, empty_task_4]

DayOfWeekSensor¶

使用 DayOfWeekSensor 感知星期几。

airflow/example_dags/example_sensors.py[源代码]

t11 = DayOfWeekSensor(
    task_id="week_day_sensor_failing_on_timeout", timeout=3, soft_fail=True, week_day=WeekDay.MONDAY
)