dd9d5c157e
Use a new rollback accumulator to collect which tasks need to be rolled back and use that in the ordered workflow code. Move the usage of provides/requires as functions and just let them be attributes of the flow objects.
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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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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from taskflow import task
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ARGS_KEY = '__args__'
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KWARGS_KEY = '__kwargs__'
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ORDER_KEY = '__order__'
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def close_all(*args):
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for a in args:
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if not a:
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continue
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a.close()
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def null_functor(*args, **kwargs): # pylint: disable=W0613
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return None
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class ProvidesRequiresTask(task.Task):
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def __init__(self, name, provides, requires):
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super(ProvidesRequiresTask, self).__init__(name)
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self.provides = provides
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self.requires = requires
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def apply(self, context, *args, **kwargs):
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outs = {
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KWARGS_KEY: dict(kwargs),
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ARGS_KEY: list(args),
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}
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if not ORDER_KEY in context:
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context[ORDER_KEY] = []
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context[ORDER_KEY].append(self.name)
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for v in self.provides:
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outs[v] = True
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return outs
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