| # 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 and limitations |
| # under the License. |
| |
| """A example workflow for task sub workflow.""" |
| |
| # [start tutorial] |
| # [start package_import] |
| # Import Workflow object to define your workflow attributes |
| from pydolphinscheduler.core.workflow import Workflow |
| |
| # Import task Shell object cause we would create some shell tasks later |
| from pydolphinscheduler.tasks.sub_workflow import SubWorkflow |
| from pydolphinscheduler.tasks.shell import Shell |
| |
| |
| # [start workflow_declare] |
| # [start sub_workflow_declare] |
| with Workflow(name="sub_workflow_downstream") as wf_downstream, Workflow( |
| name="task_sub_workflow_example" |
| ) as wf_upstream: |
| sub_workflow_ds_task = Shell( |
| name="task_sub_workflow", |
| command="echo 'call sub workflow success!'", |
| workflow=wf_downstream, |
| ) |
| wf_downstream.submit() |
| # [end sub_workflow_declare] |
| |
| sub_workflow_pre = Shell( |
| name="pre-task", |
| command="echo 'prefix task for sub workflow'", |
| workflow=wf_upstream, |
| ) |
| # [start sub_workflow_task_declare] |
| sw_task = SubWorkflow( |
| name="sub_workflow", |
| workflow_name=wf_downstream.name, |
| workflow=wf_upstream, |
| ) |
| # [end sub_workflow_task_declare] |
| sub_workflow_pre >> sw_task |
| # Please make sure workflow with name `wf_downstream.name` exists when we submit or run sub workflow task |
| wf_upstream.run() |
| # [end workflow_declare] |