src/etl/examples/etl-example/dags/product_staging.py
# -*- coding: utf-8 -*-
#
# Licensed 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 and
# limitations under the License.
from __future__ import print_function
import airflow
from datetime import datetime, timedelta
from acme.operators.dwh_operators import PostgresToPostgresOperator
from acme.operators.dwh_operators import AuditOperator
from airflow.models import Variable
args = {
'owner': 'airflow',
'start_date': airflow.utils.dates.days_ago(7),
'provide_context': True
}
tmpl_search_path = Variable.get("sql_path")
dag = airflow.DAG(
'product_staging',
schedule_interval="@daily",
dagrun_timeout=timedelta(minutes=60),
template_searchpath=tmpl_search_path,
default_args=args,
max_active_runs=1)
get_auditid = AuditOperator(
task_id='get_audit_id',
postgres_conn_id='postgres_dwh',
audit_key="product",
cycle_dtm="{{ ts }}",
dag=dag,
pool='postgres_dwh')
extract_product = PostgresToPostgresOperator(
sql='select_product.sql',
pg_table='staging.product',
src_postgres_conn_id='postgres_oltp',
dest_postgress_conn_id='postgres_dwh',
pg_preoperator="DELETE FROM staging.product WHERE "
"partition_dtm >= DATE '{{ ds }}' AND partition_dtm < DATE '{{ tomorrow_ds }}'",
parameters={"window_start_date": "{{ ds }}", "window_end_date": "{{ tomorrow_ds }}",
"audit_id": "{{ ti.xcom_pull(task_ids='get_audit_id', key='audit_id') }}"},
task_id='extract_product',
dag=dag,
pool='postgres_dwh')
get_auditid >> extract_product
if __name__ == "__main__":
dag.cli()