Source code for airflow.example_dags.example_outlet_event_extra
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"""
Example DAG to demonstrate annotating a dataset event with extra information.
Also see examples in ``example_inlet_event_extra.py``.
"""
from __future__ import annotations
import datetime
from airflow.datasets import Dataset
from airflow.datasets.metadata import Metadata
from airflow.decorators import task
from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
[docs]ds = Dataset("s3://output/1.txt")
with DAG(
dag_id="dataset_with_extra_by_yield",
catchup=False,
start_date=datetime.datetime.min,
schedule="@daily",
tags=["produces"],
):
@task(outlets=[ds])
dataset_with_extra_by_yield()
with DAG(
dag_id="dataset_with_extra_by_context",
catchup=False,
start_date=datetime.datetime.min,
schedule="@daily",
tags=["produces"],
):
@task(outlets=[ds])
dataset_with_extra_by_context()
with DAG(
dag_id="dataset_with_extra_from_classic_operator",
catchup=False,
start_date=datetime.datetime.min,
schedule="@daily",
tags=["produces"],
):
def _dataset_with_extra_from_classic_operator_post_execute(context, result):
context["outlet_events"][ds].extra = {"hi": "bye"}
BashOperator(
task_id="dataset_with_extra_from_classic_operator",
outlets=[ds],
bash_command=":",
post_execute=_dataset_with_extra_from_classic_operator_post_execute,
)