You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
2.0 KiB
52 lines
2.0 KiB
3 years ago
|
# 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.
|
||
|
|
|
||
|
|
r"""
|
||
|
|
A example workflow for task switch.
|
||
|
|
|
||
|
|
This example will create four task in single workflow, with three shell task and one switch task. Task switch
|
||
|
|
have one upstream which we declare explicit with syntax `parent >> switch`, and two downstream automatically
|
||
|
|
set dependence by switch task by passing parameter `condition`. The graph of this workflow like:
|
||
|
|
--> switch_child_1
|
||
|
|
/
|
||
|
|
parent -> switch ->
|
||
|
|
\
|
||
|
|
--> switch_child_2
|
||
|
|
.
|
||
|
|
"""
|
||
|
|
|
||
|
|
from tasks.switch import Branch, Default, Switch, SwitchCondition
|
||
|
|
|
||
|
|
from pydolphinscheduler.core.process_definition import ProcessDefinition
|
||
|
|
from pydolphinscheduler.tasks.shell import Shell
|
||
|
|
|
||
|
|
with ProcessDefinition(
|
||
|
|
name="task_dependent_external",
|
||
|
|
tenant="tenant_exists",
|
||
|
|
) as pd:
|
||
|
|
parent = Shell(name="parent", command="echo parent")
|
||
|
|
switch_child_1 = Shell(name="switch_child_1", command="echo switch_child_1")
|
||
|
|
switch_child_2 = Shell(name="switch_child_2", command="echo switch_child_2")
|
||
|
|
switch_condition = SwitchCondition(
|
||
|
|
Branch(condition="${var} > 1", task=switch_child_1),
|
||
|
|
Default(task=switch_child_2),
|
||
|
|
)
|
||
|
|
|
||
|
|
switch = Switch(name="switch", condition=switch_condition)
|
||
|
|
parent >> switch
|
||
|
|
pd.submit()
|