b1f81badfd
Match the requirements for taskflow with the openstack requirements (note the upstream requirements are missing 'futures' and 'networkx') and update the new hacking violations that were detected due to the hacking requirement version bump. Change-Id: I8d1326cf2a8b1ea062f5e9aacd0c4f8261c6531a
146 lines
3.8 KiB
Python
146 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012-2013 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 logging
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import os
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import sys
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logging.basicConfig(level=logging.ERROR)
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top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
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os.pardir,
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os.pardir))
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sys.path.insert(0, top_dir)
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import taskflow.engines
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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 import task
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def build_frame():
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return 'steel'
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def build_engine():
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return 'honda'
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def build_doors():
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return '2'
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def build_wheels():
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return '4'
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def install_engine(frame, engine):
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return True
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def install_doors(frame, windows_installed, doors):
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return True
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def install_windows(frame, doors):
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return True
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def install_wheels(frame, engine, engine_installed, wheels):
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return True
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def trash(**kwargs):
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print("Throwing away pieces of car!")
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def startup(**kwargs):
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# TODO(harlowja): try triggering reversion here!
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# raise ValueError("Car not verified")
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return True
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def verify(spec, **kwargs):
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for key, value in kwargs.items():
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if spec[key] != value:
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raise Exception("Car doesn't match spec!")
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return True
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def flow_watch(state, details):
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print('Flow => %s' % state)
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def task_watch(state, details):
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print('Task %s => %s' % (details.get('task_name'), state))
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flow = lf.Flow("make-auto").add(
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task.FunctorTask(startup, revert=trash, provides='ran'),
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gf.Flow("install-parts").add(
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task.FunctorTask(build_frame, provides='frame'),
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task.FunctorTask(build_engine, provides='engine'),
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task.FunctorTask(build_doors, provides='doors'),
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task.FunctorTask(build_wheels, provides='wheels'),
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task.FunctorTask(install_engine, provides='engine_installed'),
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task.FunctorTask(install_doors, provides='doors_installed'),
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task.FunctorTask(install_windows, provides='windows_installed'),
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task.FunctorTask(install_wheels, provides='wheels_installed')),
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task.FunctorTask(verify, requires=['frame',
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'engine',
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'doors',
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'wheels',
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'engine_installed',
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'doors_installed',
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'windows_installed',
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'wheels_installed']))
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spec = {
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"frame": 'steel',
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"engine": 'honda',
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"doors": '2',
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"wheels": '4',
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"engine_installed": True,
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"doors_installed": True,
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"windows_installed": True,
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"wheels_installed": True,
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}
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engine = taskflow.engines.load(flow, store={'spec': spec.copy()})
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engine.notifier.register('*', flow_watch)
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engine.task_notifier.register('*', task_watch)
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print("Build a car")
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engine.run()
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spec['doors'] = 5
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engine = taskflow.engines.load(flow, store={'spec': spec.copy()})
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engine.notifier.register('*', flow_watch)
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engine.task_notifier.register('*', task_watch)
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try:
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print("Build a wrong car that doesn't match specification")
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engine.run()
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except Exception as e:
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print("Flow failed: %s" % e)
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