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OpenStack Study: constants.py

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# Copyright 2013 VMware, Inc.

# All Rights Reserved

#

# 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.

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class TaskStatus(object):

"""Task running status.

This is used by execution/status callback function to notify the

task manager what's the status of current task, and also used for

indication the final task execution result.

"""

PENDING = 1

COMPLETED = 2

ERROR = 3

ABORT = 4

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class TaskState(object):

"""Current state of a task.

This is to keep track of the current state of a task.

NONE: the task is still in the queue

START: the task is pull out from the queue and is about to be executed

EXECUTED: the task has been executed

STATUS: we're running periodic status check for this task

RESULT: the task has finished and result is ready

"""

NONE = -1

START = 0

EXECUTED = 1

STATUS = 2

RESULT = 3