Source code for tests.system.apache.kylin.example_kylin_dag

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"""
This is an example DAG which uses the KylinCubeOperator.
The tasks below include kylin build, refresh, merge operation.
"""

from __future__ import annotations

import os
from datetime import datetime

from airflow import DAG
from airflow.providers.apache.kylin.operators.kylin_cube import KylinCubeOperator


[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")


[docs]DAG_ID = "example_kylin_operator"


with DAG(
    dag_id=DAG_ID,
    schedule=None,
    start_date=datetime(2021, 1, 1),
    catchup=False,
    default_args={"project": "learn_kylin", "cube": "kylin_sales_cube"},
    tags=["example"],
) as dag:

    @dag.task

[docs]    def gen_build_time():
        """
        Gen build time and push to XCom (with key of "return_value")
        :return: A dict with build time values.
        """
        return {"date_start": "1325347200000", "date_end": "1325433600000"}


    gen_build_time_task = gen_build_time()
    gen_build_time_output_date_start = gen_build_time_task["date_start"]
    gen_build_time_output_date_end = gen_build_time_task["date_end"]

    build_task1 = KylinCubeOperator(
        task_id="kylin_build_1",
        command="build",
        start_time=gen_build_time_output_date_start,
        end_time=gen_build_time_output_date_end,
        is_track_job=True,
    )

    build_task2 = KylinCubeOperator(
        task_id="kylin_build_2",
        command="build",
        start_time=gen_build_time_output_date_end,
        end_time="1325520000000",
        is_track_job=True,
    )

    refresh_task1 = KylinCubeOperator(
        task_id="kylin_refresh_1",
        command="refresh",
        start_time=gen_build_time_output_date_start,
        end_time=gen_build_time_output_date_end,
        is_track_job=True,
    )

    merge_task = KylinCubeOperator(
        task_id="kylin_merge",
        command="merge",
        start_time=gen_build_time_output_date_start,
        end_time="1325520000000",
        is_track_job=True,
    )

    disable_task = KylinCubeOperator(
        task_id="kylin_disable",
        command="disable",
    )

    purge_task = KylinCubeOperator(
        task_id="kylin_purge",
        command="purge",
    )

    build_task3 = KylinCubeOperator(
        task_id="kylin_build_3",
        command="build",
        start_time=gen_build_time_output_date_end,
        end_time="1328730000000",
    )

    build_task1 >> build_task2 >> refresh_task1 >> merge_task >> disable_task >> purge_task >> build_task3

    # Task dependency created via `XComArgs`:
    #   gen_build_time >> build_task1
    #   gen_build_time >> build_task2
    #   gen_build_time >> refresh_task1
    #   gen_build_time >> merge_task
    #   gen_build_time >> build_task3
    from tests_common.test_utils.watcher import watcher

    # This test needs watcher in order to properly mark success/failure
    # when "tearDown" task with trigger rule is part of the DAG
    list(dag.tasks) >> watcher()

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)

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