Source code for tests.system.openlineage.example_openlineage_defer

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from __future__ import annotations

import os
from datetime import datetime, timedelta
from pathlib import Path

from airflow import DAG
from airflow.models import Variable
from airflow.providers.standard.operators.python import PythonOperator
from airflow.providers.standard.sensors.time_delta import TimeDeltaSensorAsync

from system.openlineage.operator import OpenLineageTestOperator



[docs]
def my_task(task_number):
    print(os.getcwd())
    print(f"Executing task number: {task_number}")




[docs]
def check_start_amount_func():
    events = Variable.get(key="openlineage_basic_defer_dag.wait.event.start", deserialize_json=True)
    if len(events) < 2:
        raise ValueError(f"Expected at least 2 events, got {len(events)}")



with DAG(
    dag_id="openlineage_basic_defer_dag",
    start_date=datetime(2021, 1, 1),
    schedule=None,
    catchup=False,
) as dag:
    # Timedelta is compared to the DAGRun start timestamp, which can occur long before a worker picks up the
    # task. We need to ensure the sensor gets deferred at least once, so setting 180s.

[docs]
    wait = TimeDeltaSensorAsync(task_id="wait", delta=timedelta(seconds=180))


    check_start_events_amount = PythonOperator(
        task_id="check_start_events_amount", python_callable=check_start_amount_func
    )

    check_events = OpenLineageTestOperator(
        task_id="check_events",
        file_path=str(Path(__file__).parent / "example_openlineage_defer.json"),
        allow_duplicate_events=True,
    )

    wait >> check_start_events_amount >> check_events


from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)

[docs]
test_run = get_test_run(dag)