def test_external_task_sensor(self):
self.test_time_sensor()
t = ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
dag=self.dag)
t.run(start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
def test_external_task_sensor_failed_states(self):
self.test_time_sensor()
op = ExternalTaskSensor(
task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
failed_states=["failed"],
dag=self.dag,
)
op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
def test_external_task_sensor_waits_for_task_check_existence(self):
op = ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id="example_bash_operator",
external_task_id="non-existing-task",
check_existence=True,
dag=self.dag)
with self.assertRaises(AirflowException):
op.run(start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
def test_external_task_sensor_delta(self):
self.test_time_sensor()
t = ExternalTaskSensor(task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_delta=timedelta(0),
allowed_states=['success'],
dag=self.dag)
t.run(start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
def test_external_task_sensor_waits_for_dag_check_existence(self):
t = ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id="non-existing-dag",
external_task_id=None,
check_existence=True,
dag=self.dag)
with self.assertRaises(AirflowException):
t.run(start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
def dag_bag_ext():
"""
Create a DagBag with DAGs looking like this. The dotted lines represent external dependencies
set up using ExternalTaskMarker and ExternalTaskSensor.
dag_0: task_a_0 >> task_b_0
|
|
dag_1: ---> task_a_1 >> task_b_1
|
|
dag_2: ---> task_a_2 >> task_b_2
|
|
dag_3: ---> task_a_3 >> task_b_3
"""
dag_bag = DagBag(dag_folder=DEV_NULL, include_examples=False)
dag_0 = DAG("dag_0", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_0 = DummyOperator(task_id="task_a_0", dag=dag_0)
task_b_0 = ExternalTaskMarker(
task_id="task_b_0", external_dag_id="dag_1", external_task_id="task_a_1", recursion_depth=3, dag=dag_0
)
task_a_0 >> task_b_0
dag_1 = DAG("dag_1", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_1 = ExternalTaskSensor(
task_id="task_a_1", external_dag_id=dag_0.dag_id, external_task_id=task_b_0.task_id, dag=dag_1
)
task_b_1 = ExternalTaskMarker(
task_id="task_b_1", external_dag_id="dag_2", external_task_id="task_a_2", recursion_depth=2, dag=dag_1
)
task_a_1 >> task_b_1
dag_2 = DAG("dag_2", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_2 = ExternalTaskSensor(
task_id="task_a_2", external_dag_id=dag_1.dag_id, external_task_id=task_b_1.task_id, dag=dag_2
)
task_b_2 = ExternalTaskMarker(
task_id="task_b_2", external_dag_id="dag_3", external_task_id="task_a_3", recursion_depth=1, dag=dag_2
)
task_a_2 >> task_b_2
dag_3 = DAG("dag_3", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_3 = ExternalTaskSensor(
task_id="task_a_3", external_dag_id=dag_2.dag_id, external_task_id=task_b_2.task_id, dag=dag_3
)
task_b_3 = DummyOperator(task_id="task_b_3", dag=dag_3)
task_a_3 >> task_b_3
for dag in [dag_0, dag_1, dag_2, dag_3]:
dag_bag.bag_dag(dag=dag, root_dag=dag)
return dag_bag
def test_external_dag_sensor(self):
other_dag = DAG('other_dag', default_args=self.args, end_date=DEFAULT_DATE, schedule_interval='@once')
other_dag.create_dagrun(
run_id='test', start_date=DEFAULT_DATE, execution_date=DEFAULT_DATE, state=State.SUCCESS
)
op = ExternalTaskSensor(
task_id='test_external_dag_sensor_check',
external_dag_id='other_dag',
external_task_id=None,
dag=self.dag,
)
op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
def test_external_task_sensor(self):
self.test_time_sensor()
t = ExternalTaskSensor(
task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
dag=self.dag
)
t.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def test_external_task_sensor_fn(self):
self.test_time_sensor()
# check that the execution_fn works
op1 = ExternalTaskSensor(
task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=lambda dt: dt + timedelta(0),
allowed_states=['success'],
dag=self.dag
)
op1.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
# double check that the execution is being called by failing the test
op2 = ExternalTaskSensor(
task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=lambda dt: dt + timedelta(days=1),
allowed_states=['success'],
timeout=1,
poke_interval=1,
dag=self.dag
)
with self.assertRaises(exceptions.AirflowSensorTimeout):
op2.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def test_catch_invalid_allowed_states(self):
with self.assertRaises(ValueError):
ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
allowed_states=['invalid_state'],
dag=self.dag)
with self.assertRaises(ValueError):
ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=None,
allowed_states=['invalid_state'],
dag=self.dag)
def test_external_task_sensor_failed_states_as_success(self):
self.test_time_sensor()
op = ExternalTaskSensor(
task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
allowed_states=["failed"],
failed_states=["success"],
dag=self.dag,
)
with self.assertRaises(AirflowException) as cm:
op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
self.assertEqual(
str(cm.exception), "The external task " "time_sensor_check in DAG " "unit_test_dag failed."
)
def test_external_task_sensor_waits_for_dag_check_existence(self):
t = ExternalTaskSensor(
task_id='test_external_task_sensor_check',
external_dag_id="non-existing-dag",
external_task_id=None,
check_existence=True,
dag=self.dag
)
with self.assertRaises(AirflowException):
t.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def test_external_task_sensor_delta(self):
self.test_time_sensor()
t = ExternalTaskSensor(
task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_delta=timedelta(0),
allowed_states=['success'],
dag=self.dag
)
t.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def dag_bag_cyclic():
"""
Create a DagBag with DAGs having cyclic dependencies set up by ExternalTaskMarker and
ExternalTaskSensor.
dag_0: task_a_0 >> task_b_0
^ |
| |
dag_1: | ---> task_a_1 >> task_b_1
| |
---------------------------------
"""
dag_bag = DagBag(dag_folder=DEV_NULL, include_examples=False)
dag_0 = DAG("dag_0", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_0 = DummyOperator(task_id="task_a_0", dag=dag_0)
task_b_0 = ExternalTaskMarker(
task_id="task_b_0", external_dag_id="dag_1", external_task_id="task_a_1", recursion_depth=3, dag=dag_0
)
task_a_0 >> task_b_0
dag_1 = DAG("dag_1", start_date=DEFAULT_DATE, schedule_interval=None)
task_a_1 = ExternalTaskSensor(
task_id="task_a_1", external_dag_id=dag_0.dag_id, external_task_id=task_b_0.task_id, dag=dag_1
)
task_b_1 = ExternalTaskMarker(
task_id="task_b_1", external_dag_id="dag_0", external_task_id="task_a_0", recursion_depth=2, dag=dag_1
)
task_a_1 >> task_b_1
for dag in [dag_0, dag_1]:
dag_bag.bag_dag(dag=dag, root_dag=dag)
return dag_bag
def dag_bag_head_tail():
"""
Create a DagBag containing one DAG, with task "head" depending on task "tail" of the
previous execution_date.
20200501 20200502 20200510
+------+ +------+ +------+
| head | -->head | --> -->head |
| | | / | | | / / | | |
| v | / | v | / / | v |
| body | / | body | / ... / | body |
| | |/ | | |/ / | | |
| v / | v / / | v |
| tail/| | tail/| / | tail |
+------+ +------+ +------+
"""
dag_bag = DagBag(dag_folder=DEV_NULL, include_examples=False)
with DAG("head_tail", start_date=DEFAULT_DATE,
schedule_interval="@daily") as dag:
head = ExternalTaskSensor(task_id='head',
external_dag_id=dag.dag_id,
external_task_id="tail",
execution_delta=timedelta(days=1),
mode="reschedule")
body = DummyOperator(task_id="body")
tail = ExternalTaskMarker(task_id="tail",
external_dag_id=dag.dag_id,
external_task_id=head.task_id,
execution_date="{{ tomorrow_ds_nodash }}")
head >> body >> tail
dag_bag.bag_dag(dag=dag, root_dag=dag)
yield dag_bag
def create_monitoring_dag(parent_dag, start_date, schedule_interval,
triggered_dag_id, finish_file_dir,
trigger_file_path):
with DAG(dag_id=f'{parent_dag}.monitoring_dag',
start_date=start_date,
schedule_interval=schedule_interval) as sub_dag:
external_dag_sensor = ExternalTaskSensor(
task_id='external_dag_sensor',
external_dag_id=triggered_dag_id,
external_task_id='',
poke_interval=10)
print_result = PythonOperator(task_id='print_result',
provide_context=True,
python_callable=print_result_func(
external_dag_id=triggered_dag_id,
last_task_id='end'))
remove_file = BashOperator(task_id='remove_file',
bash_command=f'rm -f {trigger_file_path}')
create_finish_file = BashOperator(
task_id='create_finish_file',
bash_command=
"touch {{ params.finish_file_dir }}/finished_{{ ts_nodash }}",
params={'finish_file_dir': finish_file_dir})
external_dag_sensor >> print_result >> remove_file >> create_finish_file
return sub_dag
def test_external_task_sensor_wrong_failed_states(self):
with self.assertRaises(ValueError):
ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
failed_states=["invalid_state"],
dag=self.dag)
def test_catch_overlap_allowed_failed_state(self):
with self.assertRaises(AirflowException):
ExternalTaskSensor(task_id='test_external_task_sensor_check',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
allowed_states=[State.SUCCESS],
failed_states=[State.SUCCESS],
dag=self.dag)
def test_external_task_sensor_fn_multiple_args(self):
"""Check this task sensor passes multiple args with full context. If no failure, means clean run."""
self.test_time_sensor()
def my_func(dt, context):
assert context['execution_date'] == dt
return dt + timedelta(0)
op1 = ExternalTaskSensor(
task_id='test_external_task_sensor_multiple_arg_fn',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=my_func,
allowed_states=['success'],
dag=self.dag,
)
op1.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
def test_external_task_sensor_fn_kwargs(self):
"""Check this task sensor passes multiple args with full context. If no failure, means clean run."""
self.test_time_sensor()
def my_func(dt, ds_nodash, tomorrow_ds_nodash):
assert ds_nodash == dt.strftime("%Y%m%d")
assert tomorrow_ds_nodash == (dt + timedelta(days=1)).strftime("%Y%m%d")
return dt + timedelta(0)
op1 = ExternalTaskSensor(
task_id='test_external_task_sensor_fn_kwargs',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=my_func,
allowed_states=['success'],
dag=self.dag,
)
op1.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
def _create_accounts_hub_op(dag):
external_dag_id = lz_alpha_public.DAG_ID
external_task_id = lz_alpha_public.TaskId.ACCOUNTS
return ExternalTaskSensor(task_id='{}.{}'.format(external_dag_id,
external_task_id),
external_dag_id=external_dag_id,
external_task_id=external_task_id,
allowed_states=['success', 'skipped'],
mode="reschedule",
dag=dag)
def _create_balances_increment_hub_op(dag):
external_dag_id = lz_alpha_public.DAG_ID
external_task_id = lz_alpha_public.TaskId.BALANCES_INCREMENT
return ExternalTaskSensor(task_id='{}.{}'.format(external_dag_id,
external_task_id),
external_dag_id=external_dag_id,
external_task_id=external_task_id,
allowed_states=['success', 'skipped'],
mode="reschedule",
dag=dag)
def _create_balances_previous_day_op(dag):
external_dag_id = dwh_alpha_public.DAG_ID
external_task_id = lz_alpha_public.TaskId.BALANCES
return ExternalTaskSensor(task_id=f'{external_task_id}-previous_day',
external_dag_id=external_dag_id,
external_task_id=external_task_id,
allowed_states=['success', 'skipped'],
execution_delta=datetime.timedelta(days=1),
mode="reschedule",
dag=dag)
def _create_deals_dwh_op(dag, instance):
external_dag_id = '{}.{}'.format(dwh_beta_public.DAG_ID, instance)
external_task_id = dwh_beta_public.TaskId.DEALS
return ExternalTaskSensor(task_id='{}.{}'.format(external_dag_id,
external_task_id),
external_dag_id=external_dag_id,
external_task_id=external_task_id,
allowed_states=['success', 'skipped'],
mode="reschedule",
dag=dag)
def test_external_task_sensor_error_delta_and_fn(self):
self.test_time_sensor()
# Test that providing execution_delta and a function raises an error
with self.assertRaises(ValueError):
ExternalTaskSensor(task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_delta=timedelta(0),
execution_date_fn=lambda dt: dt,
allowed_states=['success'],
dag=self.dag)
def create_dag_from_config(dag_id: str, dag_config, operators=OPERATORS) -> DAG:
dag = DAG(dag_id, **dag_config["dag_config"])
with dag:
task_dict = {}
for task in dag_config["tasks"]:
created_task = create_task(task, operators)
if created_task == None:
continue
task_dict[task.get("task_id")] = {
"task": created_task,
"dependencies": task.get("depends_on", []),
}
external_dependency_sensors = {}
for task_id, task_and_dependencies in task_dict.items():
task = task_and_dependencies.get("task")
dependencies = task_and_dependencies.get("dependencies", [])
for dependency in dependencies:
dependency_dag_id = dependency.get("dag")
dependency_task_id = dependency.get("task")
try:
if dependency_dag_id == dag_id:
task_dict[dependency_task_id]["task"] >> task
else:
external_dependency_task_id = (
f"wait_for_{dependency_dag_id}_{dependency_task_id}"
)
if external_dependency_task_id in external_dependency_sensors:
external_task_sensor = external_dependency_sensors[
external_dependency_task_id
]
else:
external_task_sensor = ExternalTaskSensor(
dag=dag,
task_id=f"wait_for_{dependency_dag_id}_{dependency_task_id}",
external_dag_id=dependency_dag_id,
external_task_id=dependency_task_id,
allowed_states=["success"],
mode="reschedule",
poke_interval=random.randint(150, 210),
)
external_dependency_sensors[
external_dependency_task_id
] = external_task_sensor
external_task_sensor >> task
except KeyError as e:
logging.error(
f"Cannot set the task {task_id} dependencies ({str(e)})"
)
return dag
def test_templated_sensor(self):
with self.dag:
sensor = ExternalTaskSensor(
task_id='templated_task', external_dag_id='dag_{{ ds }}', external_task_id='task_{{ ds }}'
)
instance = TaskInstance(sensor, DEFAULT_DATE)
instance.render_templates()
self.assertEqual(sensor.external_dag_id, f"dag_{DEFAULT_DATE.date()}")
self.assertEqual(sensor.external_task_id, f"task_{DEFAULT_DATE.date()}")
def test_external_task_sensor_fn(self):
self.test_time_sensor()
# check that the execution_fn works
t = ExternalTaskSensor(
task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=lambda dt: dt + timedelta(0),
allowed_states=['success'],
dag=self.dag
)
t.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
# double check that the execution is being called by failing the test
t2 = ExternalTaskSensor(
task_id='test_external_task_sensor_check_delta',
external_dag_id=TEST_DAG_ID,
external_task_id=TEST_TASK_ID,
execution_date_fn=lambda dt: dt + timedelta(days=1),
allowed_states=['success'],
timeout=1,
poke_interval=1,
dag=self.dag
)
with self.assertRaises(exceptions.AirflowSensorTimeout):
t2.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def test_external_dag_sensor(self):
other_dag = DAG(
'other_dag',
default_args=self.args,
end_date=DEFAULT_DATE,
schedule_interval='@once')
other_dag.create_dagrun(
run_id='test',
start_date=DEFAULT_DATE,
execution_date=DEFAULT_DATE,
state=State.SUCCESS)
t = ExternalTaskSensor(
task_id='test_external_dag_sensor_check',
external_dag_id='other_dag',
external_task_id=None,
dag=self.dag
)
t.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True
)
def test_templated_sensor(self):
dag = DAG(TEST_DAG_ID, self.args)
with dag:
sensor = ExternalTaskSensor(task_id='templated_task',
external_dag_id='dag_{{ ds }}',
external_task_id='task_{{ ds }}',
start_date=DEFAULT_DATE)
instance = TaskInstance(sensor, DEFAULT_DATE)
instance.render_templates()
self.assertEqual(sensor.external_dag_id,
"dag_{}".format(DEFAULT_DATE.date()))
self.assertEqual(sensor.external_task_id,
"task_{}".format(DEFAULT_DATE.date()))
def load_subdag(parent_dag_name, child_dag_name, def_args):
dag_subdag = DAG(dag_id=f'{parent_dag_name}.{child_dag_name}',
default_args=def_args,
schedule_interval='@hourly')
with dag_subdag:
wait_to_finish_dag = ExternalTaskSensor(
task_id='wait_for_dag',
external_dag_id='gridu_dag',
execution_delta=timedelta(minutes=5),
external_task_id=None,
allowed_states=['success'])
remove_a_file = BashOperator(task_id='remove_a_file',
bash_command=f'rm {path_to_run_file}')
print_a_result = PythonOperator(task_id='print_a_result',
python_callable=print_pulled_value)
create_a_file = BashOperator(
task_id='create_a_file',
bash_command='touch finished_{{ ts_nodash }}')
wait_to_finish_dag >> remove_a_file >> print_a_result >> create_a_file
return dag_subdag
def build_process_result_sub_dag(main_dag, default_args):
s_dag = DAG(
dag_id="{}.{}".format(main_dag, 'process_result_sub_dag'),
default_args=default_args,
schedule_interval='@hourly'
)
with s_dag:
external_dag_sensor = ExternalTaskSensor(
task_id='external_dag_sensor',
external_dag_id=dagToCall,
external_task_id=None,
execution_date_fn=get_external_dag_execution_date,
check_existence=True,
poke_interval=5,
timeout=120,
soft_fail=True
)
ex_file_sensor = FileSensor(
task_id="ex_file_sensor",
filepath=ex_file
)
print_external_dag_result = PythonOperator(
task_id="print_external_dag_result",
python_callable=_print_external_dag_result,
provide_context=True
)
remove_trigger_file = BashOperator(
task_id="remove_trigger_file",
bash_command="rm -f {}".format(path)
)
create_finished_file = BashOperator(
task_id="create_finished_file",
bash_command="touch " + default_path + "/finished_#{{ ts_nodash }}"
)
ex_file_sensor >> external_dag_sensor >> print_external_dag_result >> remove_trigger_file >> create_finished_file
return s_dag
def test_external_task_sensor_fn_multiple_execution_dates(self):
bash_command_code = """
{% set s=execution_date.time().second %}
echo "second is {{ s }}"
if [[ $(( {{ s }} % 60 )) == 1 ]]
then
exit 1
fi
exit 0
"""
dag_external_id = TEST_DAG_ID + '_external'
dag_external = DAG(
dag_external_id,
default_args=self.args,
schedule_interval=timedelta(seconds=1))
task_external_with_failure = BashOperator(
task_id="task_external_with_failure",
bash_command=bash_command_code,
retries=0,
dag=dag_external)
task_external_without_failure = DummyOperator(
task_id="task_external_without_failure",
retries=0,
dag=dag_external)
task_external_without_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE + timedelta(seconds=1),
ignore_ti_state=True)
session = settings.Session()
TI = TaskInstance
try:
task_external_with_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE + timedelta(seconds=1),
ignore_ti_state=True)
# The test_with_failure task is excepted to fail
# once per minute (the run on the first second of
# each minute).
except Exception as e:
failed_tis = session.query(TI).filter(
TI.dag_id == dag_external_id,
TI.state == State.FAILED,
TI.execution_date == DEFAULT_DATE + timedelta(seconds=1)).all()
if len(failed_tis) == 1 and \
failed_tis[0].task_id == 'task_external_with_failure':
pass
else:
raise e
dag_id = TEST_DAG_ID
dag = DAG(
dag_id,
default_args=self.args,
schedule_interval=timedelta(minutes=1))
task_without_failure = ExternalTaskSensor(
task_id='task_without_failure',
external_dag_id=dag_external_id,
external_task_id='task_external_without_failure',
execution_date_fn=lambda dt: [dt + timedelta(seconds=i)
for i in range(2)],
allowed_states=['success'],
retries=0,
timeout=1,
poke_interval=1,
dag=dag)
task_with_failure = ExternalTaskSensor(
task_id='task_with_failure',
external_dag_id=dag_external_id,
external_task_id='task_external_with_failure',
execution_date_fn=lambda dt: [dt + timedelta(seconds=i)
for i in range(2)],
allowed_states=['success'],
retries=0,
timeout=1,
poke_interval=1,
dag=dag)
task_without_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
with self.assertRaises(AirflowSensorTimeout):
task_with_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
start_date = datetime.datetime(2015, 1, 1)
with DAG(
dag_id="example_external_task_marker_parent",
start_date=start_date,
schedule_interval=None,
tags=['example'],
) as parent_dag:
# [START howto_operator_external_task_marker]
parent_task = ExternalTaskMarker(
task_id="parent_task",
external_dag_id="example_external_task_marker_child",
external_task_id="child_task1")
# [END howto_operator_external_task_marker]
with DAG(
dag_id="example_external_task_marker_child",
start_date=start_date,
schedule_interval=None,
tags=['example'],
) as child_dag:
# [START howto_operator_external_task_sensor]
child_task1 = ExternalTaskSensor(task_id="child_task1",
external_dag_id=parent_dag.dag_id,
external_task_id=parent_task.task_id,
mode="reschedule")
# [END howto_operator_external_task_sensor]
child_task2 = DummyOperator(task_id="child_task2")
child_task1 >> child_task2
import airflow.utils.dates
from airflow import DAG
from airflow.sensors.external_task_sensor import ExternalTaskSensor
from airflow.providers.postgres.operators.postgres import PostgresOperator
from datetime import datetime, timedelta
default_args = {"owner": "airflow", "start_date": datetime(2020, 1, 1)}
with DAG(dag_id="cleaning_dag",
default_args=default_args,
schedule_interval="*/10 * * * *",
catchup=False) as dag:
waiting_for_task = ExternalTaskSensor(task_id='waiting_for_task',
external_dag_id='avocado_dag',
external_task_id='publish_notebook',
failed_states=['failed'])
cleaning_xcoms = PostgresOperator(task_id='cleaning_xcoms',
sql='sql/CLEANING_XCOMS.sql',
postgres_conn_id='postgres')
waiting_for_task >> cleaning_xcoms
def test_external_task_sensor_fn_multiple_execution_dates(self):
bash_command_code = """
{% set s=execution_date.time().second %}
echo "second is {{ s }}"
if [[ $(( {{ s }} % 60 )) == 1 ]]
then
exit 1
fi
exit 0
"""
dag_external_id = TEST_DAG_ID + '_external'
dag_external = DAG(
dag_external_id,
default_args=self.args,
schedule_interval=timedelta(seconds=1))
task_external_with_failure = BashOperator(
task_id="task_external_with_failure",
bash_command=bash_command_code,
retries=0,
dag=dag_external)
task_external_without_failure = DummyOperator(
task_id="task_external_without_failure",
retries=0,
dag=dag_external)
task_external_without_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE + timedelta(seconds=1),
ignore_ti_state=True)
session = settings.Session()
TI = TaskInstance
try:
task_external_with_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE + timedelta(seconds=1),
ignore_ti_state=True)
# The test_with_failure task is excepted to fail
# once per minute (the run on the first second of
# each minute).
except Exception as e: # pylint: disable=broad-except
failed_tis = session.query(TI).filter(
TI.dag_id == dag_external_id,
TI.state == State.FAILED,
TI.execution_date == DEFAULT_DATE + timedelta(seconds=1)).all()
if len(failed_tis) == 1 and \
failed_tis[0].task_id == 'task_external_with_failure':
pass
else:
raise e
dag_id = TEST_DAG_ID
dag = DAG(
dag_id,
default_args=self.args,
schedule_interval=timedelta(minutes=1))
task_without_failure = ExternalTaskSensor(
task_id='task_without_failure',
external_dag_id=dag_external_id,
external_task_id='task_external_without_failure',
execution_date_fn=lambda dt: [dt + timedelta(seconds=i)
for i in range(2)],
allowed_states=['success'],
retries=0,
timeout=1,
poke_interval=1,
dag=dag)
task_with_failure = ExternalTaskSensor(
task_id='task_with_failure',
external_dag_id=dag_external_id,
external_task_id='task_external_with_failure',
execution_date_fn=lambda dt: [dt + timedelta(seconds=i)
for i in range(2)],
allowed_states=['success'],
retries=0,
timeout=1,
poke_interval=1,
dag=dag)
task_without_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)
with self.assertRaises(AirflowSensorTimeout):
task_with_failure.run(
start_date=DEFAULT_DATE,
end_date=DEFAULT_DATE,
ignore_ti_state=True)