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[python] Add task condition (#7505)

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* [python] Add task condition

close: #6927

* Add example and set downstream dep
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Jiajie Zhong 2021-12-22 11:06:45 +08:00 committed by GitHub
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55
dolphinscheduler-python/pydolphinscheduler/examples/task_conditions_example.py Normal file
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@ -0,0 +1,55 @@
# 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 condition.
This example will create five task in single workflow, with four shell task and one condition task. Task
condition have one upstream which we declare explicit with syntax `parent >> condition`, and three downstream
automatically set dependence by condition task by passing parameter `condition`. The graph of this workflow
like:
--> condition_success_1
/
parent -> conditions -> --> condition_success_2
\
--> condition_fail
.
"""
from pydolphinscheduler.core.process_definition import ProcessDefinition
from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Conditions
from pydolphinscheduler.tasks.shell import Shell
with ProcessDefinition(name="task_conditions_example", tenant="tenant_exists") as pd:
parent = Shell(name="parent", command="echo parent")
condition_success_1 = Shell(
name="condition_success_1", command="echo condition_success_1"
)
condition_success_2 = Shell(
name="condition_success_2", command="echo condition_success_2"
)
condition_fail = Shell(name="condition_fail", command="echo condition_fail")
cond_operator = And(
And(
SUCCESS(condition_success_1, condition_success_2),
FAILURE(condition_fail),
),
)
condition = Conditions(name="conditions", condition=cond_operator)
parent >> condition
pd.submit()

1
dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/constants.py
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@ -75,6 +75,7 @@ class TaskType(str):
PROCEDURE = "PROCEDURE"
DATAX = "DATAX"
DEPENDENT = "DEPENDENT"
CONDITIONS = "CONDITIONS"
class DefaultTaskCodeNum(str):

185
dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/condition.py Normal file
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@ -0,0 +1,185 @@
# 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.
"""Task Conditions."""
from typing import Dict, List
from pydolphinscheduler.constants import TaskType
from pydolphinscheduler.core.base import Base
from pydolphinscheduler.core.task import Task
from pydolphinscheduler.exceptions import PyDSParamException
class Status(Base):
"""Base class of Condition task status.
It a parent class for :class:`SUCCESS` and :class:`FAILURE`. Provider status name
and :func:`get_define` to sub class.
"""
def __init__(self, *tasks):
super().__init__(f"Condition.{self.status_name()}")
self.tasks = tasks
def __repr__(self) -> str:
return "depend_item_list"
@classmethod
def status_name(cls) -> str:
"""Get name for Status or its sub class."""
return cls.__name__.upper()
def get_define(self, camel_attr: bool = True) -> List:
"""Get status definition attribute communicate to Java gateway server."""
content = []
for task in self.tasks:
if not isinstance(task, Task):
raise PyDSParamException(
"%s only accept class Task or sub class Task, but get %s",
(self.status_name(), type(task)),
)
content.append({"depTaskCode": task.code, "status": self.status_name()})
return content
class SUCCESS(Status):
"""Class SUCCESS to task condition, sub class of :class:`Status`."""
def __init__(self, *tasks):
super().__init__(*tasks)
class FAILURE(Status):
"""Class FAILURE to task condition, sub class of :class:`Status`."""
def __init__(self, *tasks):
super().__init__(*tasks)
class ConditionOperator(Base):
"""Set ConditionTask or ConditionOperator with specific operator."""
_DEFINE_ATTR = {
"relation",
}
def __init__(self, *args):
super().__init__(self.__class__.__name__)
self.args = args
def __repr__(self) -> str:
return "depend_task_list"
@classmethod
def operator_name(cls) -> str:
"""Get operator name in different class."""
return cls.__name__.upper()
@property
def relation(self) -> str:
"""Get operator name in different class, for function :func:`get_define`."""
return self.operator_name()
def set_define_attr(self) -> str:
"""Set attribute to function :func:`get_define`.
It is a wrapper for both `And` and `Or` operator.
"""
result = []
attr = None
for condition in self.args:
if isinstance(condition, (Status, ConditionOperator)):
if attr is None:
attr = repr(condition)
elif repr(condition) != attr:
raise PyDSParamException(
"Condition %s operator parameter only support same type.",
self.relation,
)
else:
raise PyDSParamException(
"Condition %s operator parameter support ConditionTask and ConditionOperator but got %s.",
(self.relation, type(condition)),
)
if attr == "depend_item_list":
result.extend(condition.get_define())
else:
result.append(condition.get_define())
setattr(self, attr, result)
return attr
def get_define(self, camel_attr=True) -> Dict:
"""Overwrite Base.get_define to get task Condition specific get define."""
attr = self.set_define_attr()
dependent_define_attr = self._DEFINE_ATTR.union({attr})
return super().get_define_custom(
camel_attr=True, custom_attr=dependent_define_attr
)
class And(ConditionOperator):
"""Operator And for task condition.
It could accept both :class:`Task` and children of :class:`ConditionOperator`,
and set AND condition to those args.
"""
def __init__(self, *args):
super().__init__(*args)
class Or(ConditionOperator):
"""Operator Or for task condition.
It could accept both :class:`Task` and children of :class:`ConditionOperator`,
and set OR condition to those args.
"""
def __init__(self, *args):
super().__init__(*args)
class Conditions(Task):
"""Task condition object, declare behavior for condition task to dolphinscheduler."""
def __init__(self, name: str, condition: ConditionOperator, *args, **kwargs):
super().__init__(name, TaskType.CONDITIONS, *args, **kwargs)
self.condition = condition
# Set condition tasks as current task downstream
self._set_dep()
def _set_dep(self) -> None:
"""Set downstream according to parameter `condition`."""
downstream = []
for cond in self.condition.args:
if isinstance(cond, ConditionOperator):
for status in cond.args:
downstream.extend(list(status.tasks))
self.set_downstream(downstream)
@property
def task_params(self, camel_attr: bool = True, custom_attr: set = None) -> Dict:
"""Override Task.task_params for Condition task.
Condition task have some specials attribute `dependence`, and in most of the task
this attribute is None and use empty dict `{}` as default value. We do not use class
attribute `_task_custom_attr` due to avoid attribute cover.
"""
params = super().task_params
params["dependence"] = self.condition.get_define()
return params

3
dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/dependent.py
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@ -180,9 +180,6 @@ class DependentOperator(Base):
"relation",
}
DEPENDENT_ITEM = "DependentItem"
DEPENDENT_OPERATOR = "DependentOperator"
def __init__(self, *args):
super().__init__(self.__class__.__name__)
self.args = args

439
dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_condition.py Normal file
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@ -0,0 +1,439 @@
# 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.
"""Test Task dependent."""
from typing import List, Tuple
from unittest.mock import patch
import pytest
from pydolphinscheduler.core.process_definition import ProcessDefinition
from pydolphinscheduler.exceptions import PyDSParamException
from pydolphinscheduler.tasks.condition import (
FAILURE,
SUCCESS,
And,
ConditionOperator,
Conditions,
Or,
Status,
)
from tests.testing.task import Task
TEST_NAME = "test-name"
TEST_PROJECT = "test-project"
TEST_PROCESS_DEFINITION = "test-process-definition"
TEST_TYPE = "test-type"
TEST_PROJECT_CODE, TEST_DEFINITION_CODE, TEST_TASK_CODE = 12345, 123456, 1234567
TEST_OPERATOR_LIST = ("AND", "OR")
@pytest.mark.parametrize(
"obj, expect",
[
(Status, "STATUS"),
(SUCCESS, "SUCCESS"),
(FAILURE, "FAILURE"),
],
)
def test_class_status_status_name(obj: Status, expect: str):
"""Test class status and sub class property status_name."""
assert obj.status_name() == expect
@pytest.mark.parametrize(
"obj, tasks",
[
(Status, (1, 2, 3)),
(SUCCESS, (1.1, 2.2, 3.3)),
(FAILURE, (ConditionOperator(1), ConditionOperator(2), ConditionOperator(3))),
],
)
def test_class_status_depend_item_list_no_expect_type(obj: Status, tasks: Tuple):
"""Test class status and sub class raise error when assign not support type."""
with pytest.raises(
PyDSParamException, match=".*?only accept class Task or sub class Task, but get"
):
obj(*tasks).get_define()
@pytest.mark.parametrize(
"obj, tasks",
[
(Status, [Task(str(i), TEST_TYPE) for i in range(1)]),
(Status, [Task(str(i), TEST_TYPE) for i in range(2)]),
(Status, [Task(str(i), TEST_TYPE) for i in range(3)]),
(SUCCESS, [Task(str(i), TEST_TYPE) for i in range(1)]),
(SUCCESS, [Task(str(i), TEST_TYPE) for i in range(2)]),
(SUCCESS, [Task(str(i), TEST_TYPE) for i in range(3)]),
(FAILURE, [Task(str(i), TEST_TYPE) for i in range(1)]),
(FAILURE, [Task(str(i), TEST_TYPE) for i in range(2)]),
(FAILURE, [Task(str(i), TEST_TYPE) for i in range(3)]),
],
)
def test_class_status_depend_item_list(obj: Status, tasks: Tuple):
"""Test class status and sub class function :func:`depend_item_list`."""
status = obj.status_name()
expect = [
{
"depTaskCode": i.code,
"status": status,
}
for i in tasks
]
assert obj(*tasks).get_define() == expect
@pytest.mark.parametrize(
"obj, expect",
[
(ConditionOperator, "CONDITIONOPERATOR"),
(And, "AND"),
(Or, "OR"),
],
)
def test_condition_operator_operator_name(obj: ConditionOperator, expect: str):
"""Test class ConditionOperator and sub class class function :func:`operator_name`."""
assert obj.operator_name() == expect
@pytest.mark.parametrize(
"obj, expect",
[
(ConditionOperator, "CONDITIONOPERATOR"),
(And, "AND"),
(Or, "OR"),
],
)
def test_condition_operator_relation(obj: ConditionOperator, expect: str):
"""Test class ConditionOperator and sub class class property `relation`."""
assert obj(1).relation == expect
@pytest.mark.parametrize(
"obj, status_or_operator, match",
[
(
ConditionOperator,
[Status(Task("1", TEST_TYPE)), 1],
".*?operator parameter support ConditionTask and ConditionOperator.*?",
),
(
ConditionOperator,
[
Status(Task("1", TEST_TYPE)),
1.0,
],
".*?operator parameter support ConditionTask and ConditionOperator.*?",
),
(
ConditionOperator,
[
Status(Task("1", TEST_TYPE)),
ConditionOperator(And(Status(Task("1", TEST_TYPE)))),
],
".*?operator parameter only support same type.",
),
(
ConditionOperator,
[
ConditionOperator(And(Status(Task("1", TEST_TYPE)))),
Status(Task("1", TEST_TYPE)),
],
".*?operator parameter only support same type.",
),
],
)
def test_condition_operator_set_define_attr_not_support_type(
obj, status_or_operator, match
):
"""Test class ConditionOperator parameter error, including parameter not same or type not support."""
with pytest.raises(PyDSParamException, match=match):
op = obj(*status_or_operator)
op.set_define_attr()
@pytest.mark.parametrize(
"obj, task_num",
[
(ConditionOperator, 1),
(ConditionOperator, 2),
(ConditionOperator, 3),
(And, 1),
(And, 2),
(And, 3),
(Or, 1),
(Or, 2),
(Or, 3),
],
)
def test_condition_operator_set_define_attr_status(
obj: ConditionOperator, task_num: int
):
"""Test :func:`set_define_attr` with one or more class status."""
attr = "depend_item_list"
tasks = [Task(str(i), TEST_TYPE) for i in range(task_num)]
status = Status(*tasks)
expect = [
{"depTaskCode": task.code, "status": status.status_name()} for task in tasks
]
co = obj(status)
co.set_define_attr()
assert getattr(co, attr) == expect
@pytest.mark.parametrize(
"obj, status",
[
(ConditionOperator, (SUCCESS, SUCCESS)),
(ConditionOperator, (FAILURE, FAILURE)),
(ConditionOperator, (SUCCESS, FAILURE)),
(ConditionOperator, (FAILURE, SUCCESS)),
(And, (SUCCESS, SUCCESS)),
(And, (FAILURE, FAILURE)),
(And, (SUCCESS, FAILURE)),
(And, (FAILURE, SUCCESS)),
(Or, (SUCCESS, SUCCESS)),
(Or, (FAILURE, FAILURE)),
(Or, (SUCCESS, FAILURE)),
(Or, (FAILURE, SUCCESS)),
],
)
def test_condition_operator_set_define_attr_mix_status(
obj: ConditionOperator, status: List[Status]
):
"""Test :func:`set_define_attr` with one or more mixed status."""
attr = "depend_item_list"
task = Task("test-operator", TEST_TYPE)
status_list = []
expect = []
for sta in status:
status_list.append(sta(task))
expect.append({"depTaskCode": task.code, "status": sta.status_name()})
co = obj(*status_list)
co.set_define_attr()
assert getattr(co, attr) == expect
@pytest.mark.parametrize(
"obj, task_num",
[
(ConditionOperator, 1),
(ConditionOperator, 2),
(ConditionOperator, 3),
(And, 1),
(And, 2),
(And, 3),
(Or, 1),
(Or, 2),
(Or, 3),
],
)
def test_condition_operator_set_define_attr_operator(
obj: ConditionOperator, task_num: int
):
"""Test :func:`set_define_attr` with one or more class condition operator."""
attr = "depend_task_list"
task = Task("test-operator", TEST_TYPE)
status = Status(task)
expect = [
{
"relation": obj.operator_name(),
"dependItemList": [
{
"depTaskCode": task.code,
"status": status.status_name(),
}
],
}
for _ in range(task_num)
]
co = obj(*[obj(status) for _ in range(task_num)])
co.set_define_attr()
assert getattr(co, attr) == expect
@pytest.mark.parametrize(
"cond, sub_cond",
[
(ConditionOperator, (And, Or)),
(ConditionOperator, (Or, And)),
(And, (And, Or)),
(And, (Or, And)),
(Or, (And, Or)),
(Or, (Or, And)),
],
)
def test_condition_operator_set_define_attr_mix_operator(
cond: ConditionOperator, sub_cond: Tuple[ConditionOperator]
):
"""Test :func:`set_define_attr` with one or more class mix condition operator."""
attr = "depend_task_list"
task = Task("test-operator", TEST_TYPE)
expect = []
sub_condition = []
for cond in sub_cond:
status = Status(task)
sub_condition.append(cond(status))
expect.append(
{
"relation": cond.operator_name(),
"dependItemList": [
{
"depTaskCode": task.code,
"status": status.status_name(),
}
],
}
)
co = cond(*sub_condition)
co.set_define_attr()
assert getattr(co, attr) == expect
@patch(
"pydolphinscheduler.core.task.Task.gen_code_and_version",
return_value=(12345, 1),
)
@patch(
"pydolphinscheduler.tasks.condition.Conditions.gen_code_and_version",
return_value=(123, 1),
)
def test_dependent_get_define(mock_condition_code_version, mock_task_code_version):
"""Test task condition :func:`get_define`."""
common_task = Task(name="common_task", task_type="test_task_condition")
cond_operator = And(
And(
SUCCESS(common_task, common_task),
FAILURE(common_task, common_task),
),
Or(
SUCCESS(common_task, common_task),
FAILURE(common_task, common_task),
),
)
name = "test_condition_get_define"
expect = {
"code": 123,
"name": name,
"version": 1,
"description": None,
"delayTime": 0,
"taskType": "CONDITIONS",
"taskParams": {
"resourceList": [],
"localParams": [],
"dependence": {
"relation": "AND",
"dependTaskList": [
{
"relation": "AND",
"dependItemList": [
{"depTaskCode": common_task.code, "status": "SUCCESS"},
{"depTaskCode": common_task.code, "status": "SUCCESS"},
{"depTaskCode": common_task.code, "status": "FAILURE"},
{"depTaskCode": common_task.code, "status": "FAILURE"},
],
},
{
"relation": "OR",
"dependItemList": [
{"depTaskCode": common_task.code, "status": "SUCCESS"},
{"depTaskCode": common_task.code, "status": "SUCCESS"},
{"depTaskCode": common_task.code, "status": "FAILURE"},
{"depTaskCode": common_task.code, "status": "FAILURE"},
],
},
],
},
"conditionResult": {"successNode": [""], "failedNode": [""]},
"waitStartTimeout": {},
},
"flag": "YES",
"taskPriority": "MEDIUM",
"workerGroup": "default",
"failRetryTimes": 0,
"failRetryInterval": 1,
"timeoutFlag": "CLOSE",
"timeoutNotifyStrategy": None,
"timeout": 0,
}
task = Conditions(name, condition=cond_operator)
assert task.get_define() == expect
@patch(
"pydolphinscheduler.core.task.Task.gen_code_and_version",
return_value=(123, 1),
)
def test_condition_set_dep_workflow(mock_task_code_version):
"""Test task condition set dependence in workflow level."""
with ProcessDefinition(name="test-condition-set-dep-workflow") as pd:
parent = Task(name="parent", task_type=TEST_TYPE)
condition_success_1 = Task(name="condition_success_1", task_type=TEST_TYPE)
condition_success_2 = Task(name="condition_success_2", task_type=TEST_TYPE)
condition_fail = Task(name="condition_fail", task_type=TEST_TYPE)
cond_operator = And(
And(
SUCCESS(condition_success_1, condition_success_2),
FAILURE(condition_fail),
),
)
condition = Conditions(name=TEST_NAME, condition=cond_operator)
parent >> condition
# General tasks test
assert len(pd.tasks) == 5
assert sorted(pd.task_list, key=lambda t: t.name) == sorted(
[
parent,
condition,
condition_success_1,
condition_success_2,
condition_fail,
],
key=lambda t: t.name,
)
# Task dep test
assert parent._downstream_task_codes == {condition.code}
assert condition._upstream_task_codes == {parent.code}
# Condition task dep after ProcessDefinition function get_define called
assert condition._downstream_task_codes == {
condition_success_1.code,
condition_success_2.code,
condition_fail.code,
}
assert all(
[
child._upstream_task_codes == {condition.code}
for child in [condition_success_1, condition_success_2, condition_fail]
]
)