62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 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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# For more information please visit: https://wiki.openstack.org/wiki/TaskFlow
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from cinder.taskflow import task
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def _make_task_name(cls, addons=None):
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"""Makes a pretty name for a task class."""
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base_name = ".".join([cls.__module__, cls.__name__])
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extra = ''
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if addons:
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extra = ';%s' % (", ".join([str(a) for a in addons]))
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return base_name + extra
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class CinderTask(task.Task):
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"""The root task class for all cinder tasks.
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It automatically names the given task using the module and class that
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implement the given task as the task name.
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"""
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def __init__(self, addons=None):
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super(CinderTask, self).__init__(_make_task_name(self.__class__,
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addons))
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class InjectTask(CinderTask):
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"""This injects a dict into the flow.
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This injection is done so that the keys (and values) provided can be
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dependended on by tasks further down the line. Since taskflow is dependency
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based this can be considered the bootstrapping task that provides an
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initial set of values for other tasks to get started with. If this did not
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exist then tasks would fail locating there dependent tasks and the values
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said dependent tasks produce.
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Reversion strategy: N/A
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"""
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def __init__(self, inject_what, addons=None):
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super(InjectTask, self).__init__(addons=addons)
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self.provides.update(inject_what.keys())
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self._inject = inject_what
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def __call__(self, context):
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return dict(self._inject)
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