task_sub_workflow_example.py

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"""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]