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50 lines
2.0 KiB
50 lines
2.0 KiB
# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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r""" |
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A example workflow for task switch. |
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This example will create four task in single workflow, with three shell task and one switch task. Task switch |
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have one upstream which we declare explicit with syntax `parent >> switch`, and two downstream automatically |
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set dependence by switch task by passing parameter `condition`. The graph of this workflow like: |
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--> switch_child_1 |
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/ |
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parent -> switch -> |
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\ |
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--> switch_child_2 |
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. |
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""" |
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from pydolphinscheduler.core.process_definition import ProcessDefinition |
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from pydolphinscheduler.tasks.shell import Shell |
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from pydolphinscheduler.tasks.switch import Branch, Default, Switch, SwitchCondition |
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with ProcessDefinition( |
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name="task_dependent_external", |
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tenant="tenant_exists", |
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) as pd: |
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parent = Shell(name="parent", command="echo parent") |
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switch_child_1 = Shell(name="switch_child_1", command="echo switch_child_1") |
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switch_child_2 = Shell(name="switch_child_2", command="echo switch_child_2") |
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switch_condition = SwitchCondition( |
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Branch(condition="${var} > 1", task=switch_child_1), |
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Default(task=switch_child_2), |
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) |
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switch = Switch(name="switch", condition=switch_condition) |
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parent >> switch |
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pd.submit()
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