Source code for airflow.example_dags.example_skip_dag

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"""Example DAG demonstrating the EmptyOperator and a custom EmptySkipOperator which skips by default."""
from __future__ import annotations

import pendulum

from airflow import DAG
from airflow.exceptions import AirflowSkipException
from airflow.operators.empty import EmptyOperator
from airflow.utils.context import Context
from airflow.utils.trigger_rule import TriggerRule

# Create some placeholder operators
[docs]class EmptySkipOperator(EmptyOperator): """Empty operator which always skips the task."""
[docs] ui_color = '#e8b7e4'
[docs] def execute(self, context: Context): raise AirflowSkipException
[docs]def create_test_pipeline(suffix, trigger_rule): """ Instantiate a number of operators for the given DAG. :param str suffix: Suffix to append to the operator task_ids :param str trigger_rule: TriggerRule for the join task :param DAG dag_: The DAG to run the operators on """ skip_operator = EmptySkipOperator(task_id=f'skip_operator_{suffix}') always_true = EmptyOperator(task_id=f'always_true_{suffix}') join = EmptyOperator(task_id=trigger_rule, trigger_rule=trigger_rule) final = EmptyOperator(task_id=f'final_{suffix}') skip_operator >> join always_true >> join join >> final
with DAG( dag_id='example_skip_dag', start_date=pendulum.datetime(2021, 1, 1, tz="UTC"), catchup=False, tags=['example'], ) as dag: create_test_pipeline('1', TriggerRule.ALL_SUCCESS) create_test_pipeline('2', TriggerRule.ONE_SUCCESS)

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