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38 lines
1.2 KiB
38 lines
1.2 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2017 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from ..iou_error import IOUError
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import logging
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log = logging.getLogger(__name__)
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def get_next_application_id(nodes):
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"""
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Calculates free application_id from given nodes
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:param nodes:
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:raises IOUError when exceeds number
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:return: integer first free id
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"""
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used = set([n.application_id for n in nodes])
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pool = set(range(1, 512))
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try:
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return (pool - used).pop()
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except KeyError:
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raise IOUError("Cannot create a new IOU VM (limit of 512 VMs on one host reached)")
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