OpenStack Study: flow_utils.py

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# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

# License for the specific language governing permissions and limitations

# under the License.

# For more information please visit: https://wiki.openstack.org/wiki/TaskFlow

from taskflow import task

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def _make_task_name(cls, addons=None):

    """Makes a pretty name for a task class."""

    base_name = ".".join([cls.__module__, cls.__name__])

    extra = ''

    if addons:

        extra = ';%s' % (", ".join([str(a) for a in addons]))

    return base_name + extra

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class CinderTask(task.Task):

"""The root task class for all cinder tasks.

It automatically names the given task using the module and class that

implement the given task as the task name.

"""

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    def __init__(self, addons=None, **kwargs):

        super(CinderTask, self).__init__(_make_task_name(self.__class__,

                                                         addons),

                                         **kwargs)