57 строки
1.9 KiB
Python
57 строки
1.9 KiB
Python
#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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"""
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Example usage of the TriggerDagRunOperator. This example holds 2 DAGs:
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1. 1st DAG (example_trigger_controller_dag) holds a TriggerDagRunOperator, which will trigger the 2nd DAG
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2. 2nd DAG (example_trigger_target_dag) which will be triggered by the TriggerDagRunOperator in the 1st DAG
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"""
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from airflow import DAG
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from airflow.operators.bash import BashOperator
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from airflow.operators.python import PythonOperator
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from airflow.utils.dates import days_ago
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dag = DAG(
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dag_id="example_trigger_target_dag",
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default_args={"owner": "airflow"},
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start_date=days_ago(2),
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schedule_interval=None,
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tags=['example']
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)
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def run_this_func(**context):
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"""
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Print the payload "message" passed to the DagRun conf attribute.
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:param context: The execution context
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:type context: dict
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"""
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print("Remotely received value of {} for key=message".format(context["dag_run"].conf["message"]))
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run_this = PythonOperator(task_id="run_this", python_callable=run_this_func, dag=dag)
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bash_task = BashOperator(
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task_id="bash_task",
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bash_command='echo "Here is the message: $message"',
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env={'message': '{{ dag_run.conf["message"] if dag_run else "" }}'},
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dag=dag,
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)
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