airflow example_dataflow_flex_template 源码
airflow example_dataflow_flex_template 代码
文件路径：/airflow/providers/google/cloud/example_dags/example_dataflow_flex_template.py
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# to you under the Apache License, Version 2.0 (the
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#
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"""
Example Airflow DAG for Google Cloud Dataflow service
"""
from __future__ import annotations
import os
from datetime import datetime
from airflow import models
from airflow.providers.google.cloud.operators.dataflow import DataflowStartFlexTemplateOperator
GCP_PROJECT_ID = os.environ.get("GCP_PROJECT_ID", "example-project")
DATAFLOW_FLEX_TEMPLATE_JOB_NAME = os.environ.get(
'GCP_DATAFLOW_FLEX_TEMPLATE_JOB_NAME', "dataflow-flex-template"
)
# For simplicity we use the same topic name as the subscription name.
PUBSUB_FLEX_TEMPLATE_TOPIC = os.environ.get(
'GCP_DATAFLOW_PUBSUB_FLEX_TEMPLATE_TOPIC', "dataflow-flex-template"
)
PUBSUB_FLEX_TEMPLATE_SUBSCRIPTION = PUBSUB_FLEX_TEMPLATE_TOPIC
GCS_FLEX_TEMPLATE_TEMPLATE_PATH = os.environ.get(
'GCP_DATAFLOW_GCS_FLEX_TEMPLATE_TEMPLATE_PATH',
"gs://INVALID BUCKET NAME/samples/dataflow/templates/streaming-beam-sql.json",
)
BQ_FLEX_TEMPLATE_DATASET = os.environ.get('GCP_DATAFLOW_BQ_FLEX_TEMPLATE_DATASET', 'airflow_dataflow_samples')
BQ_FLEX_TEMPLATE_LOCATION = os.environ.get('GCP_DATAFLOW_BQ_FLEX_TEMPLATE_LOCATION>', 'us-west1')
with models.DAG(
dag_id="example_gcp_dataflow_flex_template_java",
start_date=datetime(2021, 1, 1),
catchup=False,
) as dag_flex_template:
# [START howto_operator_start_template_job]
start_flex_template = DataflowStartFlexTemplateOperator(
task_id="start_flex_template_streaming_beam_sql",
body={
"launchParameter": {
"containerSpecGcsPath": GCS_FLEX_TEMPLATE_TEMPLATE_PATH,
"jobName": DATAFLOW_FLEX_TEMPLATE_JOB_NAME,
"parameters": {
"inputSubscription": PUBSUB_FLEX_TEMPLATE_SUBSCRIPTION,
"outputTable": f"{GCP_PROJECT_ID}:{BQ_FLEX_TEMPLATE_DATASET}.streaming_beam_sql",
},
}
},
do_xcom_push=True,
location=BQ_FLEX_TEMPLATE_LOCATION,
)
# [END howto_operator_start_template_job]
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