1126 lines
45 KiB
Python
1126 lines
45 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import contextlib
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import functools
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import futurist
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import six
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import testtools
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import taskflow.engines
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from taskflow.engines.action_engine import engine as eng
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from taskflow.engines.worker_based import engine as w_eng
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from taskflow.engines.worker_based import worker as wkr
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from taskflow import exceptions as exc
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from taskflow.patterns import graph_flow as gf
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from taskflow.patterns import linear_flow as lf
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from taskflow.patterns import unordered_flow as uf
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from taskflow.persistence import models
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from taskflow import states
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from taskflow import task
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from taskflow import test
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from taskflow.tests import utils
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from taskflow.types import failure
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from taskflow.types import graph as gr
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from taskflow.utils import eventlet_utils as eu
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from taskflow.utils import persistence_utils as p_utils
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from taskflow.utils import threading_utils as tu
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class EngineTaskTest(object):
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def test_run_task_as_flow(self):
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flow = utils.ProgressingTask(name='task1')
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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engine.run()
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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def test_run_task_with_notifications(self):
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flow = utils.ProgressingTask(name='task1')
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine) as capturer:
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engine.run()
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expected = ['task1.f RUNNING', 'task1.t RUNNING',
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'task1.t SUCCESS(5)', 'task1.f SUCCESS']
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self.assertEqual(expected, capturer.values)
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def test_failing_task_with_notifications(self):
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values = []
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flow = utils.FailingTask('fail')
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engine = self._make_engine(flow)
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expected = ['fail.f RUNNING', 'fail.t RUNNING',
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'fail.t FAILURE(Failure: RuntimeError: Woot!)',
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'fail.t REVERTING', 'fail.t REVERTED(None)',
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'fail.f REVERTED']
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with utils.CaptureListener(engine, values=values) as capturer:
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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self.assertEqual(expected, capturer.values)
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self.assertEqual(engine.storage.get_flow_state(), states.REVERTED)
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with utils.CaptureListener(engine, values=values) as capturer:
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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now_expected = list(expected)
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now_expected.extend(['fail.t PENDING', 'fail.f PENDING'])
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now_expected.extend(expected)
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self.assertEqual(now_expected, values)
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self.assertEqual(engine.storage.get_flow_state(), states.REVERTED)
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def test_invalid_flow_raises(self):
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def compile_bad(value):
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engine = self._make_engine(value)
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engine.compile()
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value = 'i am string, not task/flow, sorry'
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err = self.assertRaises(TypeError, compile_bad, value)
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self.assertIn(value, str(err))
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def test_invalid_flow_raises_from_run(self):
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def run_bad(value):
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engine = self._make_engine(value)
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engine.run()
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value = 'i am string, not task/flow, sorry'
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err = self.assertRaises(TypeError, run_bad, value)
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self.assertIn(value, str(err))
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def test_nasty_failing_task_exception_reraised(self):
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flow = utils.NastyFailingTask()
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engine = self._make_engine(flow)
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self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
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class EngineOptionalRequirementsTest(utils.EngineTestBase):
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def test_expected_optional_multiplers(self):
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flow_no_inject = lf.Flow("flow")
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flow_no_inject.add(utils.OptionalTask(provides='result'))
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flow_inject_a = lf.Flow("flow")
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flow_inject_a.add(utils.OptionalTask(provides='result',
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inject={'a': 10}))
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flow_inject_b = lf.Flow("flow")
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flow_inject_b.add(utils.OptionalTask(provides='result',
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inject={'b': 1000}))
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engine = self._make_engine(flow_no_inject, store={'a': 3})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'result': 15})
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engine = self._make_engine(flow_no_inject,
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store={'a': 3, 'b': 7})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'b': 7, 'result': 21})
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engine = self._make_engine(flow_inject_a, store={'a': 3})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'result': 50})
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engine = self._make_engine(flow_inject_a, store={'a': 3, 'b': 7})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'b': 7, 'result': 70})
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engine = self._make_engine(flow_inject_b, store={'a': 3})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'result': 3000})
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engine = self._make_engine(flow_inject_b, store={'a': 3, 'b': 7})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'a': 3, 'b': 7, 'result': 3000})
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class EngineMultipleResultsTest(utils.EngineTestBase):
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def test_fetch_with_a_single_result(self):
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flow = lf.Flow("flow")
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flow.add(utils.TaskOneReturn(provides='x'))
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engine = self._make_engine(flow)
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engine.run()
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result = engine.storage.fetch('x')
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self.assertEqual(result, 1)
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def test_many_results_visible_to(self):
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flow = lf.Flow("flow")
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flow.add(utils.AddOneSameProvidesRequires(
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'a', rebind={'value': 'source'}))
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flow.add(utils.AddOneSameProvidesRequires('b'))
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flow.add(utils.AddOneSameProvidesRequires('c'))
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engine = self._make_engine(flow, store={'source': 0})
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engine.run()
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# Check what each task in the prior should be seeing...
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atoms = list(flow)
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a = atoms[0]
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a_kwargs = engine.storage.fetch_mapped_args(a.rebind,
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atom_name='a')
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self.assertEqual({'value': 0}, a_kwargs)
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b = atoms[1]
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b_kwargs = engine.storage.fetch_mapped_args(b.rebind,
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atom_name='b')
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self.assertEqual({'value': 1}, b_kwargs)
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c = atoms[2]
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c_kwargs = engine.storage.fetch_mapped_args(c.rebind,
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atom_name='c')
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self.assertEqual({'value': 2}, c_kwargs)
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def test_many_results_storage_provided_visible_to(self):
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# This works as expected due to docs listed at
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#
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# http://docs.openstack.org/developer/taskflow/engines.html#scoping
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flow = lf.Flow("flow")
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flow.add(utils.AddOneSameProvidesRequires('a'))
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flow.add(utils.AddOneSameProvidesRequires('b'))
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flow.add(utils.AddOneSameProvidesRequires('c'))
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engine = self._make_engine(flow, store={'value': 0})
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engine.run()
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# Check what each task in the prior should be seeing...
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atoms = list(flow)
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a = atoms[0]
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a_kwargs = engine.storage.fetch_mapped_args(a.rebind,
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atom_name='a')
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self.assertEqual({'value': 0}, a_kwargs)
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b = atoms[1]
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b_kwargs = engine.storage.fetch_mapped_args(b.rebind,
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atom_name='b')
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self.assertEqual({'value': 0}, b_kwargs)
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c = atoms[2]
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c_kwargs = engine.storage.fetch_mapped_args(c.rebind,
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atom_name='c')
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self.assertEqual({'value': 0}, c_kwargs)
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def test_fetch_with_two_results(self):
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flow = lf.Flow("flow")
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flow.add(utils.TaskOneReturn(provides='x'))
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engine = self._make_engine(flow, store={'x': 0})
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engine.run()
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result = engine.storage.fetch('x')
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self.assertEqual(result, 0)
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def test_fetch_all_with_a_single_result(self):
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flow = lf.Flow("flow")
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flow.add(utils.TaskOneReturn(provides='x'))
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engine = self._make_engine(flow)
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'x': 1})
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def test_fetch_all_with_two_results(self):
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flow = lf.Flow("flow")
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flow.add(utils.TaskOneReturn(provides='x'))
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engine = self._make_engine(flow, store={'x': 0})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'x': [0, 1]})
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def test_task_can_update_value(self):
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flow = lf.Flow("flow")
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flow.add(utils.TaskOneArgOneReturn(requires='x', provides='x'))
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engine = self._make_engine(flow, store={'x': 0})
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engine.run()
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result = engine.storage.fetch_all()
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self.assertEqual(result, {'x': [0, 1]})
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class EngineLinearFlowTest(utils.EngineTestBase):
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def test_run_empty_flow(self):
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flow = lf.Flow('flow-1')
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engine = self._make_engine(flow)
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self.assertRaises(exc.Empty, engine.run)
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def test_overlap_parent_sibling_expected_result(self):
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flow = lf.Flow('flow-1')
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flow.add(utils.ProgressingTask(provides='source'))
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flow.add(utils.TaskOneReturn(provides='source'))
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subflow = lf.Flow('flow-2')
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subflow.add(utils.AddOne())
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flow.add(subflow)
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engine = self._make_engine(flow)
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engine.run()
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results = engine.storage.fetch_all()
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self.assertEqual(2, results['result'])
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def test_overlap_parent_expected_result(self):
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flow = lf.Flow('flow-1')
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flow.add(utils.ProgressingTask(provides='source'))
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subflow = lf.Flow('flow-2')
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subflow.add(utils.TaskOneReturn(provides='source'))
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subflow.add(utils.AddOne())
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flow.add(subflow)
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engine = self._make_engine(flow)
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engine.run()
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results = engine.storage.fetch_all()
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self.assertEqual(2, results['result'])
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def test_overlap_sibling_expected_result(self):
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flow = lf.Flow('flow-1')
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flow.add(utils.ProgressingTask(provides='source'))
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flow.add(utils.TaskOneReturn(provides='source'))
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flow.add(utils.AddOne())
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engine = self._make_engine(flow)
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engine.run()
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results = engine.storage.fetch_all()
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self.assertEqual(2, results['result'])
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def test_sequential_flow_one_task(self):
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flow = lf.Flow('flow-1').add(
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utils.ProgressingTask(name='task1')
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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engine.run()
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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def test_sequential_flow_two_tasks(self):
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flow = lf.Flow('flow-2').add(
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utils.ProgressingTask(name='task1'),
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utils.ProgressingTask(name='task2')
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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engine.run()
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
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'task2.t RUNNING', 'task2.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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self.assertEqual(len(flow), 2)
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def test_sequential_flow_two_tasks_iter(self):
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flow = lf.Flow('flow-2').add(
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utils.ProgressingTask(name='task1'),
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utils.ProgressingTask(name='task2')
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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gathered_states = list(engine.run_iter())
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self.assertTrue(len(gathered_states) > 0)
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
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'task2.t RUNNING', 'task2.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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self.assertEqual(len(flow), 2)
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def test_sequential_flow_iter_suspend_resume(self):
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flow = lf.Flow('flow-2').add(
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utils.ProgressingTask(name='task1'),
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utils.ProgressingTask(name='task2')
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)
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lb, fd = p_utils.temporary_flow_detail(self.backend)
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engine = self._make_engine(flow, flow_detail=fd)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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it = engine.run_iter()
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gathered_states = []
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suspend_it = None
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while True:
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try:
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s = it.send(suspend_it)
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gathered_states.append(s)
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if s == states.WAITING:
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# Stop it before task2 runs/starts.
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suspend_it = True
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except StopIteration:
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break
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self.assertTrue(len(gathered_states) > 0)
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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self.assertEqual(states.SUSPENDED, engine.storage.get_flow_state())
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# Attempt to resume it and see what runs now...
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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gathered_states = list(engine.run_iter())
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self.assertTrue(len(gathered_states) > 0)
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expected = ['task2.t RUNNING', 'task2.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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self.assertEqual(states.SUCCESS, engine.storage.get_flow_state())
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def test_revert_removes_data(self):
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flow = lf.Flow('revert-removes').add(
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utils.TaskOneReturn(provides='one'),
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utils.TaskMultiReturn(provides=('a', 'b', 'c')),
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utils.FailingTask(name='fail')
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)
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engine = self._make_engine(flow)
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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self.assertEqual(engine.storage.fetch_all(), {})
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def test_revert_provided(self):
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flow = lf.Flow('revert').add(
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utils.GiveBackRevert('giver'),
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utils.FailingTask(name='fail')
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)
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engine = self._make_engine(flow, store={'value': 0})
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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self.assertEqual(engine.storage.get_revert_result('giver'), 2)
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def test_nasty_revert(self):
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flow = lf.Flow('revert').add(
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utils.NastyTask('nasty'),
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utils.FailingTask(name='fail')
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)
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engine = self._make_engine(flow)
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self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
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fail = engine.storage.get_revert_result('nasty')
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self.assertIsNotNone(fail.check(RuntimeError))
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exec_failures = engine.storage.get_execute_failures()
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self.assertIn('fail', exec_failures)
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rev_failures = engine.storage.get_revert_failures()
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self.assertIn('nasty', rev_failures)
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def test_sequential_flow_nested_blocks(self):
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flow = lf.Flow('nested-1').add(
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utils.ProgressingTask('task1'),
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lf.Flow('inner-1').add(
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utils.ProgressingTask('task2')
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)
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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engine.run()
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
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'task2.t RUNNING', 'task2.t SUCCESS(5)']
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self.assertEqual(expected, capturer.values)
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def test_revert_exception_is_reraised(self):
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flow = lf.Flow('revert-1').add(
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utils.NastyTask(),
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utils.FailingTask(name='fail')
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)
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engine = self._make_engine(flow)
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self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
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def test_revert_not_run_task_is_not_reverted(self):
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flow = lf.Flow('revert-not-run').add(
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utils.FailingTask('fail'),
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utils.NeverRunningTask(),
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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expected = ['fail.t RUNNING',
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'fail.t FAILURE(Failure: RuntimeError: Woot!)',
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'fail.t REVERTING', 'fail.t REVERTED(None)']
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self.assertEqual(expected, capturer.values)
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def test_correctly_reverts_children(self):
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flow = lf.Flow('root-1').add(
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utils.ProgressingTask('task1'),
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lf.Flow('child-1').add(
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utils.ProgressingTask('task2'),
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utils.FailingTask('fail')
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)
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)
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engine = self._make_engine(flow)
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with utils.CaptureListener(engine, capture_flow=False) as capturer:
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self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
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expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
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'task2.t RUNNING', 'task2.t SUCCESS(5)',
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'fail.t RUNNING',
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'fail.t FAILURE(Failure: RuntimeError: Woot!)',
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'fail.t REVERTING', 'fail.t REVERTED(None)',
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'task2.t REVERTING', 'task2.t REVERTED(None)',
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'task1.t REVERTING', 'task1.t REVERTED(None)']
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self.assertEqual(expected, capturer.values)
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class EngineParallelFlowTest(utils.EngineTestBase):
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def test_run_empty_flow(self):
|
|
flow = uf.Flow('p-1')
|
|
engine = self._make_engine(flow)
|
|
self.assertRaises(exc.Empty, engine.run)
|
|
|
|
def test_parallel_flow_one_task(self):
|
|
flow = uf.Flow('p-1').add(
|
|
utils.ProgressingTask(name='task1', provides='a')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)']
|
|
self.assertEqual(expected, capturer.values)
|
|
self.assertEqual(engine.storage.fetch_all(), {'a': 5})
|
|
|
|
def test_parallel_flow_two_tasks(self):
|
|
flow = uf.Flow('p-2').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
utils.ProgressingTask(name='task2')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = set(['task2.t SUCCESS(5)', 'task2.t RUNNING',
|
|
'task1.t RUNNING', 'task1.t SUCCESS(5)'])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
|
|
def test_parallel_revert(self):
|
|
flow = uf.Flow('p-r-3').add(
|
|
utils.TaskNoRequiresNoReturns(name='task1'),
|
|
utils.FailingTask(name='fail'),
|
|
utils.TaskNoRequiresNoReturns(name='task2')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
|
|
self.assertIn('fail.t FAILURE(Failure: RuntimeError: Woot!)',
|
|
capturer.values)
|
|
|
|
def test_parallel_revert_exception_is_reraised(self):
|
|
# NOTE(imelnikov): if we put NastyTask and FailingTask
|
|
# into the same unordered flow, it is not guaranteed
|
|
# that NastyTask execution would be attempted before
|
|
# FailingTask fails.
|
|
flow = lf.Flow('p-r-r-l').add(
|
|
uf.Flow('p-r-r').add(
|
|
utils.TaskNoRequiresNoReturns(name='task1'),
|
|
utils.NastyTask()
|
|
),
|
|
utils.FailingTask()
|
|
)
|
|
engine = self._make_engine(flow)
|
|
self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
|
|
|
|
def test_sequential_flow_two_tasks_with_resumption(self):
|
|
flow = lf.Flow('lf-2-r').add(
|
|
utils.ProgressingTask(name='task1', provides='x1'),
|
|
utils.ProgressingTask(name='task2', provides='x2')
|
|
)
|
|
|
|
# Create FlowDetail as if we already run task1
|
|
lb, fd = p_utils.temporary_flow_detail(self.backend)
|
|
td = models.TaskDetail(name='task1', uuid='42')
|
|
td.state = states.SUCCESS
|
|
td.results = 17
|
|
fd.add(td)
|
|
|
|
with contextlib.closing(self.backend.get_connection()) as conn:
|
|
fd.update(conn.update_flow_details(fd))
|
|
td.update(conn.update_atom_details(td))
|
|
|
|
engine = self._make_engine(flow, fd)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = ['task2.t RUNNING', 'task2.t SUCCESS(5)']
|
|
self.assertEqual(expected, capturer.values)
|
|
self.assertEqual(engine.storage.fetch_all(),
|
|
{'x1': 17, 'x2': 5})
|
|
|
|
|
|
class EngineLinearAndUnorderedExceptionsTest(utils.EngineTestBase):
|
|
|
|
def test_revert_ok_for_unordered_in_linear(self):
|
|
flow = lf.Flow('p-root').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
utils.ProgressingTask(name='task2'),
|
|
uf.Flow('p-inner').add(
|
|
utils.ProgressingTask(name='task3'),
|
|
utils.FailingTask('fail')
|
|
)
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
|
|
|
|
# NOTE(imelnikov): we don't know if task 3 was run, but if it was,
|
|
# it should have been REVERTED(None) in correct order.
|
|
possible_values_no_task3 = [
|
|
'task1.t RUNNING', 'task2.t RUNNING',
|
|
'fail.t FAILURE(Failure: RuntimeError: Woot!)',
|
|
'task2.t REVERTED(None)', 'task1.t REVERTED(None)'
|
|
]
|
|
self.assertIsSuperAndSubsequence(capturer.values,
|
|
possible_values_no_task3)
|
|
if 'task3' in capturer.values:
|
|
possible_values_task3 = [
|
|
'task1.t RUNNING', 'task2.t RUNNING', 'task3.t RUNNING',
|
|
'task3.t REVERTED(None)', 'task2.t REVERTED(None)',
|
|
'task1.t REVERTED(None)'
|
|
]
|
|
self.assertIsSuperAndSubsequence(capturer.values,
|
|
possible_values_task3)
|
|
|
|
def test_revert_raises_for_unordered_in_linear(self):
|
|
flow = lf.Flow('p-root').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
utils.ProgressingTask(name='task2'),
|
|
uf.Flow('p-inner').add(
|
|
utils.ProgressingTask(name='task3'),
|
|
utils.NastyFailingTask(name='nasty')
|
|
)
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine,
|
|
capture_flow=False,
|
|
skip_tasks=['nasty']) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
|
|
|
|
# NOTE(imelnikov): we don't know if task 3 was run, but if it was,
|
|
# it should have been REVERTED(None) in correct order.
|
|
possible_values = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
|
|
'task2.t RUNNING', 'task2.t SUCCESS(5)',
|
|
'task3.t RUNNING', 'task3.t SUCCESS(5)',
|
|
'task3.t REVERTING',
|
|
'task3.t REVERTED(None)']
|
|
self.assertIsSuperAndSubsequence(possible_values, capturer.values)
|
|
possible_values_no_task3 = ['task1.t RUNNING', 'task2.t RUNNING']
|
|
self.assertIsSuperAndSubsequence(capturer.values,
|
|
possible_values_no_task3)
|
|
|
|
def test_revert_ok_for_linear_in_unordered(self):
|
|
flow = uf.Flow('p-root').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
lf.Flow('p-inner').add(
|
|
utils.ProgressingTask(name='task2'),
|
|
utils.FailingTask('fail')
|
|
)
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
|
|
self.assertIn('fail.t FAILURE(Failure: RuntimeError: Woot!)',
|
|
capturer.values)
|
|
|
|
# NOTE(imelnikov): if task1 was run, it should have been reverted.
|
|
if 'task1' in capturer.values:
|
|
task1_story = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
|
|
'task1.t REVERTED(None)']
|
|
self.assertIsSuperAndSubsequence(capturer.values, task1_story)
|
|
|
|
# NOTE(imelnikov): task2 should have been run and reverted
|
|
task2_story = ['task2.t RUNNING', 'task2.t SUCCESS(5)',
|
|
'task2.t REVERTED(None)']
|
|
self.assertIsSuperAndSubsequence(capturer.values, task2_story)
|
|
|
|
def test_revert_raises_for_linear_in_unordered(self):
|
|
flow = uf.Flow('p-root').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
lf.Flow('p-inner').add(
|
|
utils.ProgressingTask(name='task2'),
|
|
utils.NastyFailingTask()
|
|
)
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
|
|
self.assertNotIn('task2.t REVERTED(None)', capturer.values)
|
|
|
|
|
|
class EngineGraphFlowTest(utils.EngineTestBase):
|
|
|
|
def test_run_empty_flow(self):
|
|
flow = gf.Flow('g-1')
|
|
engine = self._make_engine(flow)
|
|
self.assertRaises(exc.Empty, engine.run)
|
|
|
|
def test_run_nested_empty_flows(self):
|
|
flow = gf.Flow('g-1').add(lf.Flow('l-1'),
|
|
gf.Flow('g-2'))
|
|
engine = self._make_engine(flow)
|
|
self.assertRaises(exc.Empty, engine.run)
|
|
|
|
def test_graph_flow_one_task(self):
|
|
flow = gf.Flow('g-1').add(
|
|
utils.ProgressingTask(name='task1')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)']
|
|
self.assertEqual(expected, capturer.values)
|
|
|
|
def test_graph_flow_two_independent_tasks(self):
|
|
flow = gf.Flow('g-2').add(
|
|
utils.ProgressingTask(name='task1'),
|
|
utils.ProgressingTask(name='task2')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = set(['task2.t SUCCESS(5)', 'task2.t RUNNING',
|
|
'task1.t RUNNING', 'task1.t SUCCESS(5)'])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
self.assertEqual(len(flow), 2)
|
|
|
|
def test_graph_flow_two_tasks(self):
|
|
flow = gf.Flow('g-1-1').add(
|
|
utils.ProgressingTask(name='task2', requires=['a']),
|
|
utils.ProgressingTask(name='task1', provides='a')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
|
|
'task2.t RUNNING', 'task2.t SUCCESS(5)']
|
|
self.assertEqual(expected, capturer.values)
|
|
|
|
def test_graph_flow_four_tasks_added_separately(self):
|
|
flow = (gf.Flow('g-4')
|
|
.add(utils.ProgressingTask(name='task4',
|
|
provides='d', requires=['c']))
|
|
.add(utils.ProgressingTask(name='task2',
|
|
provides='b', requires=['a']))
|
|
.add(utils.ProgressingTask(name='task3',
|
|
provides='c', requires=['b']))
|
|
.add(utils.ProgressingTask(name='task1',
|
|
provides='a'))
|
|
)
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
|
|
'task2.t RUNNING', 'task2.t SUCCESS(5)',
|
|
'task3.t RUNNING', 'task3.t SUCCESS(5)',
|
|
'task4.t RUNNING', 'task4.t SUCCESS(5)']
|
|
self.assertEqual(expected, capturer.values)
|
|
|
|
def test_graph_flow_four_tasks_revert(self):
|
|
flow = gf.Flow('g-4-failing').add(
|
|
utils.ProgressingTask(name='task4',
|
|
provides='d', requires=['c']),
|
|
utils.ProgressingTask(name='task2',
|
|
provides='b', requires=['a']),
|
|
utils.FailingTask(name='task3',
|
|
provides='c', requires=['b']),
|
|
utils.ProgressingTask(name='task1', provides='a'))
|
|
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
self.assertFailuresRegexp(RuntimeError, '^Woot', engine.run)
|
|
expected = ['task1.t RUNNING', 'task1.t SUCCESS(5)',
|
|
'task2.t RUNNING', 'task2.t SUCCESS(5)',
|
|
'task3.t RUNNING',
|
|
'task3.t FAILURE(Failure: RuntimeError: Woot!)',
|
|
'task3.t REVERTING',
|
|
'task3.t REVERTED(None)',
|
|
'task2.t REVERTING',
|
|
'task2.t REVERTED(None)',
|
|
'task1.t REVERTING',
|
|
'task1.t REVERTED(None)']
|
|
self.assertEqual(expected, capturer.values)
|
|
self.assertEqual(engine.storage.get_flow_state(), states.REVERTED)
|
|
|
|
def test_graph_flow_four_tasks_revert_failure(self):
|
|
flow = gf.Flow('g-3-nasty').add(
|
|
utils.NastyTask(name='task2', provides='b', requires=['a']),
|
|
utils.FailingTask(name='task3', requires=['b']),
|
|
utils.ProgressingTask(name='task1', provides='a'))
|
|
|
|
engine = self._make_engine(flow)
|
|
self.assertFailuresRegexp(RuntimeError, '^Gotcha', engine.run)
|
|
self.assertEqual(engine.storage.get_flow_state(), states.FAILURE)
|
|
|
|
def test_graph_flow_with_multireturn_and_multiargs_tasks(self):
|
|
flow = gf.Flow('g-3-multi').add(
|
|
utils.TaskMultiArgOneReturn(name='task1',
|
|
rebind=['a', 'b', 'y'], provides='z'),
|
|
utils.TaskMultiReturn(name='task2', provides=['a', 'b', 'c']),
|
|
utils.TaskMultiArgOneReturn(name='task3',
|
|
rebind=['c', 'b', 'x'], provides='y'))
|
|
|
|
engine = self._make_engine(flow)
|
|
engine.storage.inject({'x': 30})
|
|
engine.run()
|
|
self.assertEqual(engine.storage.fetch_all(), {
|
|
'a': 1,
|
|
'b': 3,
|
|
'c': 5,
|
|
'x': 30,
|
|
'y': 38,
|
|
'z': 42
|
|
})
|
|
|
|
def test_task_graph_property(self):
|
|
flow = gf.Flow('test').add(
|
|
utils.TaskNoRequiresNoReturns(name='task1'),
|
|
utils.TaskNoRequiresNoReturns(name='task2'))
|
|
|
|
engine = self._make_engine(flow)
|
|
engine.compile()
|
|
graph = engine.compilation.execution_graph
|
|
self.assertIsInstance(graph, gr.DiGraph)
|
|
|
|
def test_task_graph_property_for_one_task(self):
|
|
flow = utils.TaskNoRequiresNoReturns(name='task1')
|
|
|
|
engine = self._make_engine(flow)
|
|
engine.compile()
|
|
graph = engine.compilation.execution_graph
|
|
self.assertIsInstance(graph, gr.DiGraph)
|
|
|
|
|
|
class EngineMissingDepsTest(utils.EngineTestBase):
|
|
def test_missing_deps_deep(self):
|
|
flow = gf.Flow('missing-many').add(
|
|
utils.TaskOneReturn(name='task1',
|
|
requires=['a', 'b', 'c']),
|
|
utils.TaskMultiArgOneReturn(name='task2',
|
|
rebind=['e', 'f', 'g']))
|
|
engine = self._make_engine(flow)
|
|
engine.compile()
|
|
engine.prepare()
|
|
self.assertRaises(exc.MissingDependencies, engine.validate)
|
|
c_e = None
|
|
try:
|
|
engine.validate()
|
|
except exc.MissingDependencies as e:
|
|
c_e = e
|
|
self.assertIsNotNone(c_e)
|
|
self.assertIsNotNone(c_e.cause)
|
|
|
|
|
|
class EngineGraphConditionalFlowTest(utils.EngineTestBase):
|
|
|
|
def test_graph_flow_conditional(self):
|
|
flow = gf.Flow('root')
|
|
|
|
task1 = utils.ProgressingTask(name='task1')
|
|
task2 = utils.ProgressingTask(name='task2')
|
|
task2_2 = utils.ProgressingTask(name='task2_2')
|
|
task3 = utils.ProgressingTask(name='task3')
|
|
|
|
flow.add(task1, task2, task2_2, task3)
|
|
flow.link(task1, task2, decider=lambda history: False)
|
|
flow.link(task2, task2_2)
|
|
flow.link(task1, task3, decider=lambda history: True)
|
|
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
|
|
expected = set([
|
|
'task1.t RUNNING',
|
|
'task1.t SUCCESS(5)',
|
|
|
|
'task2.t IGNORE',
|
|
'task2_2.t IGNORE',
|
|
|
|
'task3.t RUNNING',
|
|
'task3.t SUCCESS(5)',
|
|
])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
|
|
def test_graph_flow_diamond_ignored(self):
|
|
flow = gf.Flow('root')
|
|
|
|
task1 = utils.ProgressingTask(name='task1')
|
|
task2 = utils.ProgressingTask(name='task2')
|
|
task3 = utils.ProgressingTask(name='task3')
|
|
task4 = utils.ProgressingTask(name='task4')
|
|
|
|
flow.add(task1, task2, task3, task4)
|
|
flow.link(task1, task2)
|
|
flow.link(task2, task4, decider=lambda history: False)
|
|
flow.link(task1, task3)
|
|
flow.link(task3, task4, decider=lambda history: True)
|
|
|
|
engine = self._make_engine(flow)
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
|
|
expected = set([
|
|
'task1.t RUNNING',
|
|
'task1.t SUCCESS(5)',
|
|
|
|
'task2.t RUNNING',
|
|
'task2.t SUCCESS(5)',
|
|
|
|
'task3.t RUNNING',
|
|
'task3.t SUCCESS(5)',
|
|
|
|
'task4.t IGNORE',
|
|
])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
self.assertEqual(states.IGNORE,
|
|
engine.storage.get_atom_state('task4'))
|
|
self.assertEqual(states.IGNORE,
|
|
engine.storage.get_atom_intention('task4'))
|
|
|
|
def test_graph_flow_conditional_history(self):
|
|
|
|
def even_odd_decider(history, allowed):
|
|
total = sum(six.itervalues(history))
|
|
if total == allowed:
|
|
return True
|
|
return False
|
|
|
|
flow = gf.Flow('root')
|
|
|
|
task1 = utils.TaskMultiArgOneReturn(name='task1')
|
|
task2 = utils.ProgressingTask(name='task2')
|
|
task2_2 = utils.ProgressingTask(name='task2_2')
|
|
task3 = utils.ProgressingTask(name='task3')
|
|
task3_3 = utils.ProgressingTask(name='task3_3')
|
|
|
|
flow.add(task1, task2, task2_2, task3, task3_3)
|
|
flow.link(task1, task2,
|
|
decider=functools.partial(even_odd_decider, allowed=2))
|
|
flow.link(task2, task2_2)
|
|
|
|
flow.link(task1, task3,
|
|
decider=functools.partial(even_odd_decider, allowed=1))
|
|
flow.link(task3, task3_3)
|
|
|
|
engine = self._make_engine(flow)
|
|
engine.storage.inject({'x': 0, 'y': 1, 'z': 1})
|
|
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
|
|
expected = set([
|
|
'task1.t RUNNING', 'task1.t SUCCESS(2)',
|
|
'task3.t IGNORE', 'task3_3.t IGNORE',
|
|
'task2.t RUNNING', 'task2.t SUCCESS(5)',
|
|
'task2_2.t RUNNING', 'task2_2.t SUCCESS(5)',
|
|
])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
|
|
engine = self._make_engine(flow)
|
|
engine.storage.inject({'x': 0, 'y': 0, 'z': 1})
|
|
with utils.CaptureListener(engine, capture_flow=False) as capturer:
|
|
engine.run()
|
|
|
|
expected = set([
|
|
'task1.t RUNNING', 'task1.t SUCCESS(1)',
|
|
'task2.t IGNORE', 'task2_2.t IGNORE',
|
|
'task3.t RUNNING', 'task3.t SUCCESS(5)',
|
|
'task3_3.t RUNNING', 'task3_3.t SUCCESS(5)',
|
|
])
|
|
self.assertEqual(expected, set(capturer.values))
|
|
|
|
|
|
class EngineCheckingTaskTest(utils.EngineTestBase):
|
|
# FIXME: this test uses a inner class that workers/process engines can't
|
|
# get to, so we need to do something better to make this test useful for
|
|
# those engines...
|
|
|
|
def test_flow_failures_are_passed_to_revert(self):
|
|
class CheckingTask(task.Task):
|
|
def execute(m_self):
|
|
return 'RESULT'
|
|
|
|
def revert(m_self, result, flow_failures):
|
|
self.assertEqual(result, 'RESULT')
|
|
self.assertEqual(list(flow_failures.keys()), ['fail1'])
|
|
fail = flow_failures['fail1']
|
|
self.assertIsInstance(fail, failure.Failure)
|
|
self.assertEqual(str(fail), 'Failure: RuntimeError: Woot!')
|
|
|
|
flow = lf.Flow('test').add(
|
|
CheckingTask(),
|
|
utils.FailingTask('fail1')
|
|
)
|
|
engine = self._make_engine(flow)
|
|
self.assertRaisesRegexp(RuntimeError, '^Woot', engine.run)
|
|
|
|
|
|
class SerialEngineTest(EngineTaskTest,
|
|
EngineMultipleResultsTest,
|
|
EngineLinearFlowTest,
|
|
EngineParallelFlowTest,
|
|
EngineLinearAndUnorderedExceptionsTest,
|
|
EngineOptionalRequirementsTest,
|
|
EngineGraphFlowTest,
|
|
EngineMissingDepsTest,
|
|
EngineGraphConditionalFlowTest,
|
|
EngineCheckingTaskTest,
|
|
test.TestCase):
|
|
def _make_engine(self, flow,
|
|
flow_detail=None, store=None):
|
|
return taskflow.engines.load(flow,
|
|
flow_detail=flow_detail,
|
|
engine='serial',
|
|
backend=self.backend,
|
|
store=store)
|
|
|
|
def test_correct_load(self):
|
|
engine = self._make_engine(utils.TaskNoRequiresNoReturns)
|
|
self.assertIsInstance(engine, eng.SerialActionEngine)
|
|
|
|
def test_singlethreaded_is_the_default(self):
|
|
engine = taskflow.engines.load(utils.TaskNoRequiresNoReturns)
|
|
self.assertIsInstance(engine, eng.SerialActionEngine)
|
|
|
|
|
|
class ParallelEngineWithThreadsTest(EngineTaskTest,
|
|
EngineMultipleResultsTest,
|
|
EngineLinearFlowTest,
|
|
EngineParallelFlowTest,
|
|
EngineLinearAndUnorderedExceptionsTest,
|
|
EngineOptionalRequirementsTest,
|
|
EngineGraphFlowTest,
|
|
EngineMissingDepsTest,
|
|
EngineGraphConditionalFlowTest,
|
|
EngineCheckingTaskTest,
|
|
test.TestCase):
|
|
_EXECUTOR_WORKERS = 2
|
|
|
|
def _make_engine(self, flow,
|
|
flow_detail=None, executor=None, store=None):
|
|
if executor is None:
|
|
executor = 'threads'
|
|
return taskflow.engines.load(flow, flow_detail=flow_detail,
|
|
backend=self.backend,
|
|
executor=executor,
|
|
engine='parallel',
|
|
store=store,
|
|
max_workers=self._EXECUTOR_WORKERS)
|
|
|
|
def test_correct_load(self):
|
|
engine = self._make_engine(utils.TaskNoRequiresNoReturns)
|
|
self.assertIsInstance(engine, eng.ParallelActionEngine)
|
|
|
|
def test_using_common_executor(self):
|
|
flow = utils.TaskNoRequiresNoReturns(name='task1')
|
|
executor = futurist.ThreadPoolExecutor(self._EXECUTOR_WORKERS)
|
|
try:
|
|
e1 = self._make_engine(flow, executor=executor)
|
|
e2 = self._make_engine(flow, executor=executor)
|
|
self.assertIs(e1.options['executor'], e2.options['executor'])
|
|
finally:
|
|
executor.shutdown(wait=True)
|
|
|
|
|
|
@testtools.skipIf(not eu.EVENTLET_AVAILABLE, 'eventlet is not available')
|
|
class ParallelEngineWithEventletTest(EngineTaskTest,
|
|
EngineMultipleResultsTest,
|
|
EngineLinearFlowTest,
|
|
EngineParallelFlowTest,
|
|
EngineLinearAndUnorderedExceptionsTest,
|
|
EngineOptionalRequirementsTest,
|
|
EngineGraphFlowTest,
|
|
EngineMissingDepsTest,
|
|
EngineGraphConditionalFlowTest,
|
|
EngineCheckingTaskTest,
|
|
test.TestCase):
|
|
|
|
def _make_engine(self, flow,
|
|
flow_detail=None, executor=None, store=None):
|
|
if executor is None:
|
|
executor = futurist.GreenThreadPoolExecutor()
|
|
self.addCleanup(executor.shutdown)
|
|
return taskflow.engines.load(flow, flow_detail=flow_detail,
|
|
backend=self.backend, engine='parallel',
|
|
executor=executor,
|
|
store=store)
|
|
|
|
|
|
class ParallelEngineWithProcessTest(EngineTaskTest,
|
|
EngineMultipleResultsTest,
|
|
EngineLinearFlowTest,
|
|
EngineParallelFlowTest,
|
|
EngineLinearAndUnorderedExceptionsTest,
|
|
EngineOptionalRequirementsTest,
|
|
EngineGraphFlowTest,
|
|
EngineMissingDepsTest,
|
|
EngineGraphConditionalFlowTest,
|
|
test.TestCase):
|
|
_EXECUTOR_WORKERS = 2
|
|
|
|
def test_correct_load(self):
|
|
engine = self._make_engine(utils.TaskNoRequiresNoReturns)
|
|
self.assertIsInstance(engine, eng.ParallelActionEngine)
|
|
|
|
def _make_engine(self, flow,
|
|
flow_detail=None, executor=None, store=None):
|
|
if executor is None:
|
|
executor = 'processes'
|
|
return taskflow.engines.load(flow, flow_detail=flow_detail,
|
|
backend=self.backend,
|
|
engine='parallel',
|
|
executor=executor,
|
|
store=store,
|
|
max_workers=self._EXECUTOR_WORKERS)
|
|
|
|
|
|
class WorkerBasedEngineTest(EngineTaskTest,
|
|
EngineMultipleResultsTest,
|
|
EngineLinearFlowTest,
|
|
EngineParallelFlowTest,
|
|
EngineLinearAndUnorderedExceptionsTest,
|
|
EngineOptionalRequirementsTest,
|
|
EngineGraphFlowTest,
|
|
EngineMissingDepsTest,
|
|
EngineGraphConditionalFlowTest,
|
|
test.TestCase):
|
|
def setUp(self):
|
|
super(WorkerBasedEngineTest, self).setUp()
|
|
shared_conf = {
|
|
'exchange': 'test',
|
|
'transport': 'memory',
|
|
'transport_options': {
|
|
# NOTE(imelnikov): I run tests several times for different
|
|
# intervals. Reducing polling interval below 0.01 did not give
|
|
# considerable win in tests run time; reducing polling interval
|
|
# too much (AFAIR below 0.0005) affected stability -- I was
|
|
# seeing timeouts. So, 0.01 looks like the most balanced for
|
|
# local transports (for now).
|
|
'polling_interval': 0.01,
|
|
},
|
|
}
|
|
worker_conf = shared_conf.copy()
|
|
worker_conf.update({
|
|
'topic': 'my-topic',
|
|
'tasks': [
|
|
# This makes it possible for the worker to run/find any atoms
|
|
# that are defined in the test.utils module (which are all
|
|
# the task/atom types that this test uses)...
|
|
utils.__name__,
|
|
],
|
|
})
|
|
self.engine_conf = shared_conf.copy()
|
|
self.engine_conf.update({
|
|
'engine': 'worker-based',
|
|
'topics': tuple([worker_conf['topic']]),
|
|
})
|
|
self.worker = wkr.Worker(**worker_conf)
|
|
self.worker_thread = tu.daemon_thread(self.worker.run)
|
|
self.worker_thread.start()
|
|
|
|
# Make sure the worker is started before we can continue...
|
|
self.worker.wait()
|
|
|
|
def tearDown(self):
|
|
self.worker.stop()
|
|
self.worker_thread.join()
|
|
super(WorkerBasedEngineTest, self).tearDown()
|
|
|
|
def _make_engine(self, flow,
|
|
flow_detail=None, store=None):
|
|
return taskflow.engines.load(flow, flow_detail=flow_detail,
|
|
backend=self.backend,
|
|
store=store, **self.engine_conf)
|
|
|
|
def test_correct_load(self):
|
|
engine = self._make_engine(utils.TaskNoRequiresNoReturns)
|
|
self.assertIsInstance(engine, w_eng.WorkerBasedActionEngine)
|