165 lines
5.2 KiB
Python
165 lines
5.2 KiB
Python
# Copyright 2017 - Nokia Networks.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import time
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import cachetools
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from oslo_config import cfg
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from mistral.db.v2 import api as db_api
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from mistral.services import actions as action_service
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from mistral.services import workflows as wf_service
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from mistral.tests.unit.engine import base
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from mistral.workflow import lookup_utils
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from mistral.workflow import states
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# Use the set_default method to set value otherwise in certain test cases
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# the change in value is not permanent.
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cfg.CONF.set_default('auth_enable', False, group='pecan')
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class LookupUtilsTest(base.EngineTestCase):
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def test_task_execution_cache_invalidation(self):
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wf_text = """---
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version: '2.0'
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wf:
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tasks:
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task1:
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action: std.noop
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on-success: join_task
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task2:
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action: std.noop
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on-success: join_task
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join_task:
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join: all
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on-success: task4
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task4:
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action: std.noop
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pause-before: true
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"""
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wf_service.create_workflows(wf_text)
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# Start workflow.
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wf_ex = self.engine.start_workflow('wf')
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self.await_workflow_paused(wf_ex.id)
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with db_api.transaction():
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# Note: We need to reread execution to access related tasks.
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wf_ex = db_api.get_workflow_execution(wf_ex.id)
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tasks = wf_ex.task_executions
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self.assertEqual(4, len(tasks))
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self._assert_single_item(tasks, name='task1', state=states.SUCCESS)
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self._assert_single_item(tasks, name='task2', state=states.SUCCESS)
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self._assert_single_item(tasks, name='join_task', state=states.SUCCESS)
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self._assert_single_item(tasks, name='task4', state=states.IDLE)
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# Expecting one cache entry because we know that 'join' operation
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# uses cached lookups and the workflow is not finished yet.
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self.assertEqual(1, lookup_utils.get_task_execution_cache_size())
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self.engine.resume_workflow(wf_ex.id)
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self.await_workflow_success(wf_ex.id)
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# Expecting that the cache size is 0 because the workflow has
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# finished and invalidated corresponding cache entry.
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self.assertEqual(0, lookup_utils.get_task_execution_cache_size())
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def test_action_definition_cache_ttl(self):
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action = """---
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version: '2.0'
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action1:
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base: std.echo output='Hi'
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output:
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result: $
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"""
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wf_text = """---
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version: '2.0'
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wf:
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tasks:
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task1:
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action: action1
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on-success: join_task
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task2:
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action: action1
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on-success: join_task
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join_task:
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join: all
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on-success: task4
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task4:
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action: action1
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pause-before: true
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"""
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wf_service.create_workflows(wf_text)
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# Create an action.
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db_actions = action_service.create_actions(action)
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self.assertEqual(1, len(db_actions))
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self._assert_single_item(db_actions, name='action1')
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# Explicitly mark the action to be deleted after the test execution.
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self.addCleanup(db_api.delete_action_definitions, name='action1')
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# Reinitialise the cache with reduced action_definition_cache_time
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# to make the test faster.
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# Save the existing cache into a temporary variable and restore
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# the value when the test passed.
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old_cache = lookup_utils._ACTION_DEF_CACHE
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lookup_utils._ACTION_DEF_CACHE = cachetools.TTLCache(
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maxsize=1000,
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ttl=5 # 5 seconds
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)
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self.addCleanup(setattr, lookup_utils, '_ACTION_DEF_CACHE', old_cache)
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# Start workflow.
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wf_ex = self.engine.start_workflow('wf')
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self.await_workflow_paused(wf_ex.id)
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# Check that 'action1' 'echo' and 'noop' are cached.
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self.assertEqual(3, lookup_utils.get_action_definition_cache_size())
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self.assertIn('action1', lookup_utils._ACTION_DEF_CACHE)
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self.assertIn('std.noop', lookup_utils._ACTION_DEF_CACHE)
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self.assertIn('std.echo', lookup_utils._ACTION_DEF_CACHE)
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# Wait some time until cache expires
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time.sleep(7)
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self.assertEqual(0, lookup_utils.get_action_definition_cache_size())
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self.engine.resume_workflow(wf_ex.id)
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self.await_workflow_success(wf_ex.id)
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# Check all actions are cached again.
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self.assertEqual(2, lookup_utils.get_action_definition_cache_size())
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self.assertIn('action1', lookup_utils._ACTION_DEF_CACHE)
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self.assertIn('std.echo', lookup_utils._ACTION_DEF_CACHE)
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