359cc490bd
To make it easily possible to change the retry atom execution from being in the engine thread this creates a retry executor (which is similar to the task executor) and provide that a serial executor (which it will use to execute with). This makes the retry and task actions closer to being the same and makes the surrounding code that much similar (which makes understanding it easier). Change-Id: I993e938280df3bd97f8076293183ef21989e2dba
56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2015 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 abc
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import six
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from taskflow import states
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@six.add_metaclass(abc.ABCMeta)
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class Action(object):
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"""An action that handles executing, state changes, ... of atoms."""
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NO_RESULT = object()
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"""
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Sentinel use to represent lack of any result (none can be a valid result)
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"""
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#: States that are expected to have a result to save...
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SAVE_RESULT_STATES = (states.SUCCESS, states.FAILURE,
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states.REVERTED, states.REVERT_FAILURE)
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def __init__(self, storage, notifier):
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self._storage = storage
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self._notifier = notifier
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@abc.abstractmethod
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def schedule_execution(self, atom):
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"""Schedules atom execution."""
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@abc.abstractmethod
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def schedule_reversion(self, atom):
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"""Schedules atom reversion."""
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@abc.abstractmethod
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def complete_reversion(self, atom, result):
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"""Completes atom reversion."""
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@abc.abstractmethod
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def complete_execution(self, atom, result):
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"""Completes atom execution."""
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