| # Copyright 2019-present Open Networking Foundation |
| # |
| # 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. |
| |
| """ |
| Example sequential workflow |
| """ |
| |
| |
| import logging |
| from datetime import datetime |
| from airflow import DAG |
| from airflow.sensors.cord_workflow_plugin import CORDEventSensor, CORDModelSensor |
| from airflow.operators.cord_workflow_plugin import CORDModelOperator |
| |
| |
| log = logging.getLogger(__name__) |
| |
| args = { |
| # hard coded date |
| 'start_date': datetime(2019, 1, 1), |
| 'owner': 'iychoi' |
| } |
| |
| dag_sequential_cord = DAG( |
| dag_id='sequential_cord_workflow', |
| default_args=args, |
| # this dag will be triggered by external systems |
| schedule_interval=None |
| ) |
| dag_sequential_cord.doc_md = __doc__ |
| |
| |
| def on_onu_event(model_accessor, message, **kwargs): |
| log.info('onu.events: received an event - %s' % message) |
| |
| |
| def on_auth_event(model_accessor, message, **kwargs): |
| log.info('authentication.events: received an event - %s' % message) |
| |
| |
| def on_dhcp_event(model_accessor, message, **kwargs): |
| log.info('dhcp.events: received an event - %s' % message) |
| |
| |
| def on_model_event(model_accessor, message, **kwargs): |
| log.info('model event: received an event - %s' % message) |
| |
| |
| onu_event_sensor = CORDEventSensor( |
| task_id='onu_event_sensor', |
| topic='onu.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| onu_event_handler = CORDModelOperator( |
| task_id='onu_event_handler', |
| python_callable=on_onu_event, |
| cord_event_sensor_task_id='onu_event_sensor', |
| dag=dag_sequential_cord |
| ) |
| |
| auth_event_sensor = CORDEventSensor( |
| task_id='auth_event_sensor', |
| topic='authentication.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| auth_event_handler = CORDModelOperator( |
| task_id='auth_event_handler', |
| python_callable=on_auth_event, |
| cord_event_sensor_task_id='auth_event_sensor', |
| dag=dag_sequential_cord |
| ) |
| |
| dhcp_event_sensor = CORDEventSensor( |
| task_id='dhcp_event_sensor', |
| topic='dhcp.events', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| dhcp_event_handler = CORDModelOperator( |
| task_id='dhcp_event_handler', |
| python_callable=on_dhcp_event, |
| cord_event_sensor_task_id='dhcp_event_sensor', |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_sensor1 = CORDModelSensor( |
| task_id='cord_model_event_sensor1', |
| model_name='cordWorkflowDriverServiceInstance', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_handler1 = CORDModelOperator( |
| task_id='cord_model_event_handler1', |
| python_callable=on_model_event, |
| cord_event_sensor_task_id='cord_model_event_sensor1', |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_sensor2 = CORDModelSensor( |
| task_id='cord_model_event_sensor2', |
| model_name='cordWorkflowDriverServiceInstance', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_handler2 = CORDModelOperator( |
| task_id='cord_model_event_handler2', |
| python_callable=on_model_event, |
| cord_event_sensor_task_id='cord_model_event_sensor2', |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_sensor3 = CORDModelSensor( |
| task_id='cord_model_event_sensor3', |
| model_name='cordWorkflowDriverServiceInstance', |
| key_field='serialNumber', |
| controller_conn_id='local_cord_controller', |
| poke_interval=5, |
| dag=dag_sequential_cord |
| ) |
| |
| cord_model_event_handler3 = CORDModelOperator( |
| task_id='cord_model_event_handler3', |
| python_callable=on_model_event, |
| cord_event_sensor_task_id='cord_model_event_sensor3', |
| dag=dag_sequential_cord |
| ) |
| |
| onu_event_sensor >> onu_event_handler >> cord_model_event_sensor1 >> cord_model_event_handler1 >> \ |
| auth_event_sensor >> auth_event_handler >> cord_model_event_sensor2 >> cord_model_event_handler2 >> \ |
| dhcp_event_sensor >> dhcp_event_handler >> cord_model_event_sensor3 >> cord_model_event_handler3 |