Source code for airflow.example_dags.example_asset_with_watchers

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"""
Example DAG for demonstrating the usage of event driven scheduling using assets and triggers.
"""

from __future__ import annotations

from airflow.decorators import task
from airflow.models.dag import DAG
from airflow.providers.standard.triggers.file import FileDeleteTrigger
from airflow.sdk import Asset, AssetWatcher, chain



[docs]
file_path = "/tmp/test"





[docs]
trigger = FileDeleteTrigger(filepath=file_path)




[docs]
asset = Asset("example_asset", watchers=[AssetWatcher(name="test_asset_watcher", trigger=trigger)])




with DAG(
    dag_id="example_asset_with_watchers",
    schedule=[asset],
    catchup=False,
):

    @task


[docs]
    def test_task():
        print("Hello world")



    chain(test_task())

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