Fokko commented on a change in pull request #4231: [AIRFLOW-3066] Adding
support for AWS Batch parameters
URL: https://github.com/apache/incubator-airflow/pull/4231#discussion_r236091049
##
File path: airflow/contrib/example_dags/example_awsbatch_operator.py
##
@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions andf limitations
+# under the License.
+
+import airflow
+from airflow.utils.log.logging_mixin import LoggingMixin
+from airflow.models import DAG
+from datetime import timedelta
+
+log = LoggingMixin().log
+
+try:
+# AWS Batch is optional, so not available in vanilla Airflow
+# pip install apache-airflow[boto3]
+from airflow.contrib.operators.awsbatch_operator import AWSBatchOperator
+
+default_args = {
+'owner': 'airflow',
+'depends_on_past': False,
+'start_date': airflow.utils.dates.days_ago(2),
+'email': ['airf...@airflow.com'],
+'email_on_failure': False,
+'email_on_retry': False,
+'retries': 1,
+'retry_delay': timedelta(minutes=5),
+}
+
+dag = DAG(
+'example_awsbatch_dag', default_args=default_args,
schedule_interval=timedelta(1))
+
+# vanilla example
+t0 = AWSBatchOperator(
+task_id='airflow-vanilla',
+job_name='airflow-vanilla',
+job_queue='airflow',
+job_definition='airflow',
+overrides={},
+queue='airflow',
+dag=dag)
+
+# overrides example
+t1 = AWSBatchOperator(
+job_name='airflow-overrides',
+task_id='airflow-overrides',
+job_queue='airflow',
+job_definition='airflow',
+overrides={
+"command": [
+"echo",
+"overrides"
+]
+},
+queue='airflow',
+dag=dag)
+
+# parameters example
+t2 = AWSBatchOperator(
+job_name='airflow-parameters',
+task_id='airflow-parameters',
+job_queue='airflow',
+job_definition='airflow',
+overrides={
+"command": [
+"echo",
+"Ref::input"
+]
+},
+parameters={
+"input": "Airflow2000"
+},
+queue='airflow',
+dag=dag)
+
+t0.set_upstream(t1)
Review comment:
Can we use the `>>` notation here?
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