airflow.sensors.external_task_sensor

Module Contents

class airflow.sensors.external_task_sensor.ExternalTaskSensor(external_dag_id, external_task_id, allowed_states=None, execution_delta=None, execution_date_fn=None, check_existence=False, *args, **kwargs)[source]

Bases:airflow.sensors.base_sensor_operator.BaseSensorOperator

Waits for a different DAG or a task in a different DAG to complete for a specific execution_date

Parameters

  • external_dag_id (str) – The dag_id that contains the task you want to wait for

  • external_task_id (str) – The task_id that contains the task you want to wait for. If None the sensor waits for the DAG

  • allowed_states (list) – list of allowed states, default is ['success']

  • execution_delta (datetime.timedelta) – time difference with the previous execution to look at, the default is the same execution_date as the current task or DAG. For yesterday, use [positive!] datetime.timedelta(days=1). Either execution_delta or execution_date_fn can be passed to ExternalTaskSensor, but not both.

  • execution_date_fn (callable) – function that receives the current execution date and returns the desired execution dates to query. Either execution_delta or execution_date_fn can be passed to ExternalTaskSensor, but not both.

  • check_existence (bool) – Set to True to check if the external task exists (when external_task_id is not None) or check if the DAG to wait for exists (when external_task_id is None), and immediately cease waiting if the external task or DAG does not exist (default value: False).

template_fields = ['external_dag_id', 'external_task_id'][source]
ui_color = #19647e[source]
poke(self, context, session=None)[source]